Recommendations
Appendix A - Subscription Option User Facilities (from X.2)
UKa
| new | imp | standard X25 | X75 | |
| 1.1 Extended Packet Sequence Numbering | n | n | y | n |
| 1.2 Nonstandard Default Window sizes | n | y | y | y |
| 1.3 Nonstandard Default Packet sizes (16 ,32 ,64,128 ,256 ,512, 1024,2048, 4096 ) | y* | y* | y | y |
| 1.4 Default Throughput Classes Assignment | n | y | y | n |
| 1.5 Flow control Parameter Negotiation | n | y | y | n |
| 1.6 Throughput Class Negotiation | n | y | y | y |
| 1.7 Packet Retransmission | y | y | y | n |
| 1.8 Incoming Calls Barred | n | y | y | n |
| 1.9 Outgoing Calls Barred | n | y | y | n |
| 1.10 One-way Logical Channel Outgoing | n | y | y | n |
| 1.11 One-way Logical Channel Incoming | n | y | y | n |
| 1.12 Closed user group | n | y | y | y |
| 1.13 Closed user group with Outgoing Access | n | p | y | y |
| 1.14 Closed user group with Incoming Access | n | p | y | n |
| 1.15 Incoming Calls Barred within a closed user group | n | n | y | n |
| 1.16 Outgoing Calls Barred within a closed user group | n | n | y | n |
| 1.17 Bilateral Closed User Groups | n | n | y | n |
| 1.18 Bilateral Closed User Groups with outgoing Access | n | n | y | n |
| 1.19 Reverse Charging Acceptance | n | y | y | y |
| 1.20 Fast Select Acceptance | n | y | y | y |
| 1.21 Multilink procedures | y | n | y | y |
| 1.22 Charging information | y | y | y | n |
| Uka TEST SCRIPT: CHARGE | ||||
| 1.23 Direct Call | n | n | y | n |
| 1.24 Hunt Group | y | y | y | n |
| UKa TEST SCRIPT: HGRP.80 HGRP.84 | ||||
| 1.25 On-line facility registration | y | n | y | n |
| 1.26 D-bit modification | n | y | y | n |
| 1.27 Local charging prevention | y | y | y | n |
| UKa TEST SCRIPT: CHRGPREV | ||||
| 1.28 Call redirection | y | y | y | n |
| UKa TEST SCRIPT: REDIR80 REDIR84 | ||||
| 1.29 Network User Identification | y | y | y | n |
| 1.30 Extended Frame Sequence Numbering | y | y | y | y |
| 1.31 RPOA Selection | y | y | y | n |
| UKa TEST SCRIPT: RPOA | ||||
Appendix B - Per Call User Facilities (from X.2 1984)
| |new | imp | standar | ||
| X25 | X75 | |||
| 2.1 Closed User Group Selection | n | y | y | y |
| 2.2 Bilateral Closed user group | n | n | y | n |
| 2.3 Reverse charging | n | y1 | y | y |
| 2.4 RPOA selection | n | y2 | y | n |
| TEST SCRIPT: RPOA | ||||
| 2.5 Flow control parameter negotiation | n | y | y | y |
| 2.6 Fast select | n | y | y | y |
| 2.7 Throughput class negotiation | n | n | y | y |
| 2.8 Abbreviated Address Calling | n | y | y | n |
| 2.9 Charging Information | y | y | y | n |
| UKa TEST SCRIPT: CHARGE | ||||
| 2.10 Transit Delay Selection and indication | y | y | y | y |
| UKa TEST SCRIPT: TRNDLY | ||||
| 2.11 Call redirection notification | y | y | y | n |
| 2.12 Called line address Modified Notification | y | y | y | y |
| 2.13 Network User Identification | y | y | y | n |
| 2.14 Closed User Group with Outgoing Access Selection | y | y | y | y |
CCITT 1984 CAUSE CODES, Expanded Length Field and the OSI DTE
Facility Marker in a 1984 to 1984 configuration.
Appendix C - Release 4 templates
TXDTES X.25 port static parameters
No change to static template TXDTES27
| TXDTES Q002 | Do you wish to define any two way SVCs? |
| TXDTES Q003 | Enter starting logical channel group number |
| TXDTES Q004 | Enter maximum number of VCs |
| TXDTES Q005 | Do you wish to define any incoming SVCs? |
| TXDTES Q006 | Enter starting logical group number |
| TXDTES Q007 | Enter maximum number of VCs |
| TXDTES Q008 | Do you wish to define any outgoing SVCs |
| TXDTES Q009 | Enter starting logical channel group number |
| TXDTES Q010 | Enter maximum number of VCs |
| TXDTES Q011 | Do you wish to define any PVCs |
| TXDTES Q012 | Enter starting logical channel group number...112 |
| TXDTES Q013 | Enter maximum number of VCs |
| TXDTES Q015 | Using X.75 protocol |
| TXDTES Q017 | Is this a privileged DTE? |
| TXDTES Q019 | Is this a prime 200 TIP |
| TXDTES Q021 | Enter remote machine number |
| TXDTES Q023 | Enter DTE address (12-digit) |
| TXDTES Q026 | Enter DTE address (14-digit) |
| TXDTES Q027 | Enter minimum length of DTE address |
| TXDTES Q028 | Is this an old-style X.25 DTE? |
Appendix C - Release 4 templates - continued
TNDTED
old template: TNDTED
new template: TNDTED53
1) For each of the questions in TNDTED53-
All questions will be asked regardless of whether you are configuring a DX1
or DX2.
When configuring a DX1, the CCITT84 questions that are not supported on the DX1 should be answered "NO"
These are :-
Q9 Does DTE subscribe to Receipt of CCITT Charging Information
Facilities?
Q10 Does DTE subscribe to Receipt of the CRN Facility/Utility?
Q11 Does DTE subscribe to Hunt Group Address Replacement?
Q12 Is the DTE required to send the CLAMN Facility?
Q13 Does DTE/STE subscribe to Receipt of the CLAMN Facility/Utility?
All questions apply to DX2 switches
| new | old | |
| TNDTED Q001 | Q001 | Using X75 or X25 protocol |
| TNDTED Q004 | Q004 | X75 DNIC barring |
| TNDTED Q008 | new | STE receive RPOA option |
| TNDTED Q010 | Q012 | sending CLAMN facility |
| TNDTED Q011 | Q013 | receipt of CLAMN facility |
| TNDTED Q012 | new | Receive CNIC Utility |
| TNDTED Q013 | new | STE receipt of transit delay |
| TNDTED Q014 | Q011 | Hunt group address replacement |
| TNDTED Q015 | Q124 | local charge prevention |
| TNDTED Q016 | Q014 | default max packet size to local STE |
| TNDTED Q017 | Q015 | default max packet size from local |
| TNDTED Q019 | Q020 | hdlc/bsc framing |
| TNDTED Q020 | Q021 | ASCII or EBCDIC for bsc framing |
| TNDTED Q021 | Q022 | high speed hdlc line |
| TNDTED Q024 | Q025 | frame retransmission count (n2) |
| TNDTED Q025 | Q026 | frame retransmission timer (t1) |
| TNDTED Q026 | Q027 | disable congestion control |
| TNDTED Q027 | Q028 | congestion - link level lower thres |
| TNDTED Q028 | Q029 | congestion link level upper thresh |
| TNDTED Q029 | Q030 | congestion packet upper threshold |
| TNDTED Q030 | Q031 | congestion packet lower threshold |
| TNDTED Q031 | Q032 | suppress accounting data |
| TNDTED Q032 | Q033 | accounting unit |
| TNDTED Q033 | Q036 | LCN assignment |
| TNDTED Q034 | Q037 | extended frame sequence numbering |
| TNDTED Q035 | Q038 | extended link level window size |
| TNDTED Q036 | Q039 | frame window size value |
| TNDTED Q037 | Q040 | bar incoming calls |
| TNDTED Q038 | Q041 | accept incoming fast select calls |
| TNDTED Q038 | Q041 | accept i/c fast select calls |
| TNDTED Q039 | Q042 | accept incoming collect calls |
| TNDTED Q040 | Q043 | bar outgoing calls |
| TNDTED Q041 | Q044 | originate fast select calls |
| TNDTED Q042 | Q045 | originat collect calls |
| TNDTED Q043 | Q046 | clear charging information |
| TNDTED Q045 | Q047 | internal clocing speed |
| TNDTED Q046 | Q050 | throughput class negotiation utility |
| TNDTED Q047 | Q051 | packet size negotiation |
| TNDTED Q048 | Q052 | window size negotiation |
| TNDTED Q049 | Q054 | local end clearing |
| TNDTED Q050 | Q055 | X29 protocol ID |
| TNDTED Q053 | Q058 | default window size to local STE |
| TNDTED Q054 | Q059 | default window size from local STE |
| TNDTED Q055 | Q060 | DCE link level addressing |
| TNDTED Q056 | Q061 | low, med or high call priority |
| TNDTED Q057 | Q063 | ICUG member |
| TNDTED Q058 | Q064 | receipt of TNIC Utility |
| TNDTED Q059 | Q009 | 1984 charging facilities |
| TNDTED Q064 | Q071 | address length value |
| TNDTED Q065 | Q072 | i/c throughput class value |
| TNDTED Q066 | Q073 | o/g throughput class value |
| TNDTED Q068 | Q075 | STE congestion timer |
| TNDTED Q069 | Q076 | restart indication interval |
| TNDTED Q070 | Q077 | restart indication count |
| TNDTED Q071 | Q078 | i/c call timerT11 |
| TNDTED Q072 | Q079 | reset interval valueT12 |
| TNDTED Q073 | Q080 | reset count |
| TNDTED Q074 | Q081 | clear interval T13 |
| TNDTED Q075 | Q082 | clear count |
| TNDTED Q076 | Q083 | STE link active/passive |
| TNDTED Q077 | Q091 | Call ID |
| TNDTED Q079 | Q093 | d-bit modification |
| TNDTED Q080 | Q094 | d-bit confirmation |
| TNDTED Q081 | Q095 | i/c call screening |
| TNDTED Q082 | Q096 | STE send ID facility |
| TNDTED Q083 | Q097 | STE receiving ID facility |
| TNDTED Q084 | Q098 | STE send interlock code |
| TNDTED Q085 | Q099 | STE receiving interlock code |
| TNDTED Q087 | Q101 | outgoing call screening |
| TNDTED Q088 | new | call forwarding |
| TNDTED Q089 | new | receive receipt call forwarding |
| TNDTED Q090 | Q104 | receipt of validatio errror facility |
| TNDTED Q093 | Q106 | X29 async call screening |
| TNDTED Q101 | Q114 | i/c priority calls |
| TNDTED Q102 | Q115 | o/g priority calls |
| TNDTED Q104 | Q117 | priority facility assignment |
| TNDTED Q105 | Q118 | medium priority fairness timer |
| TNDTED Q106 | Q119 | low priority fairness timer |
| TNDTED Q107 | Q120 | multi-user virtual circuit |
| TNDTED Q111 | Q127 | Can the DTE pass 'wait for DQ' ind |
| TNDTED Q112 | Q130 | Can the DTE receive 'wait for DQ' |
| TNDTED Q115 | q5 | Multiple Address assignment check |
| TNDTED Q116 | Q128 | Is this an old style X25 DTE |
| TNDTED Q117 | q9 | 1984 charging facilities |
| TNDTED Q118 | Q10 | CRN facility |
| TNDTED Q119 | Q12 | sending CLAMN facility |
| TNDTED Q120 | Q13 | receipt of CLAMN facility |
| TNDTED Q121 | new | DTE receipt of transit delay |
| TNDTED Q122 | new | subscription: send RPOA facility |
| TNDTED Q124 | new | subscribe: default RPOA |
| TNDTED Q125 | new | default interchange carrier (RPOA) |
| TNDTED Q126 | new | DTE receive RPOA9 |
| TNDTED Q128 | new | Subscription: send NUI facility |
| TNDTED Q130 | Q11 | Hunt Group address replacement |
| TNDTED Q131 | Q124 | subscribe: local charge prevention9 |
| TNDTED Q132 | new | subscribe: reject packet |
| TNDTED Q134 | Q14 | default max packet size to DTE |
| TNDTED Q135 | Q15 | default max packet size from DTE |
| TNDTED Q137 | q20 | hdlc/bsc framing |
| TNDTED Q138 | q21 | ASCII or EBCDIC for bsc framing |
| TNDTED Q139 | q22 | high speed hdlc line |
| TNDTED Q142 | q25 | frame retransmission count (n2) |
| TNDTED Q143 | q26 | frame retransmission timer (t1) |
| TNDTED Q144 | q27 | disable congestion control |
| TNDTED Q145 | q28 | congestion - link level lower thres |
| TNDTED Q146 | q29 | congestion - link level upper thres |
| TNDTED Q147 | q30 | congestion - packet upper threshold |
| TNDTED Q148 | q31 | congestion - packet lower threshold |
| TNDTED Q149 | q32 | accounting data |
| TNDTED Q150 | q33 | accounting unit1 |
| TNDTED Q151 | q35 | half call suppression |
| TNDTED Q152 | q36 | lcn assignment |
| TNDTED Q153 | q37 | extended frame sequence numbering |
| TNDTED Q154 | q38 | extended link level window size |
| TNDTED Q155 | q39 | frame window size value (1-7) |
| TNDTED Q156 | q40 | bar incoming calls |
| TNDTED Q157 | q41 | accept incoming fast select calls |
| TNDTED Q158 | q42 | accept incoming collect calls |
| TNDTED Q159 | q43 | bar outgoing calls |
| TNDTED Q160 | q44 | originate fast select calls |
| TNDTED Q161 | q45 | originate collect calls |
| TNDTED Q162 | q46 | clear charging information |
| TNDTED Q164 | q47 | internal clocking speed |
| TNDTED Q165 | q49 | enhanced DTE |
| TNDTED Q166 | q50 | throughput class negotiation fac |
| TNDTED Q167 | q51 | packet size negotiation |
| TNDTED Q168 | q52 | window size negotiation |
| TNDTED Q169 | q54 | local end clearing |
| TNDTED Q170 | q55 | x29 protocol id |
| TNDTED Q173 | q58 | default window size to dte |
| TNDTED Q174 | q59 | window size from dte |
| TNDTED Q175 | q60 | DCE link level addressing3 |
| TNDTED Q176 | q61 | low, medium or high call priority |
| TNDTED Q177 | q65 | privileged DTE |
| TNDTED Q178 | Q066 | tarrif utility |
| TNDTED Q182 | q70 | non zero cause codes |
| TNDTED Q183 | q71 | address length value |
| TNDTED Q184 | q72 | i/c throughput class value |
| TNDTED Q185 | q73 | o/g throughput class value |
| TNDTED Q187 | q75 | dte congestion timer |
| TNDTED Q188 | q76 | restart indication interval |
| TNDTED Q189 | q77 | restart indication count |
| TNDTED Q190 | q78 | i/c call timer |
| TNDTED Q191 | q79 | reset interval value |
| TNDTED Q192 | q80 | reset count |
| TNDTED Q193 | q81 | clear interval |
| TNDTED Q194 | q82 | clear count |
| TNDTED Q195 | q83 | dte link active/passive |
| TNDTED Q196 | q85 | UKa or alternate style address |
| TNDTED Q198 | q86 | redirection address length |
| TNDTED Q199 | q87 | redirection address length |
| TNDTED Q202 | q8 | redirect on no VCs |
| TNDTED Q203 | new | subscribe: systematic call redir |
| TNDTED Q204 | q90 | redirection address |
| TNDTED Q205 | q93 | d-bit modification |
| TNDTED Q206 | q94 | d-bit confirmation |
| TNDTED Q207 | q95 | i/c call screening |
| TNDTED Q208 | q96 | DTE send id facility |
| TNDTED Q209 | q97 | DTE receiving ID facility |
| TNDTED Q210 | q98 | DTE sending interlock code fac |
| TNDTED Q211 | q99 | DTE receiving interlock code fac7 |
| TNDTED Q212 | Q100 | validation host |
| TNDTED Q213 | Q101 | outgoing call screening |
| TNDTED Q214 | Q102 | sending call forwarding facilities |
| TNDTED Q215 | Q103 | receipt call forwarding facilities |
| TNDTED Q216 | Q104 | receipt of validation error facil |
| TNDTED Q219 | Q106 | x29 async call screening |
| TNDTED Q227 | Q114 | i/c priority calls |
| TNDTED Q228 | Q115 | o/g priority calls |
| TNDTED Q230 | Q117 | priority facility assignment |
| TNDTED Q231 | Q118 | medium priority fairness timer1 |
| TNDTED Q232 | Q119 | low priority fairness timer |
| TNDTED Q233 | Q120 | multi-user virtual circuit |
| TNDTED Q234 | Q121 | cug member |
| TNDTED Q235 | Q123 | x25 dial-in port |
| TNDTED Q238 | Q127 | Can the DTE pass 'wait for DQ' ind |
| TNDTED Q241 | Q130 | Can DTE receive 'wait for DQ' ind |
Appendix D UKb macros
:: Complete Sysgen Configuration
: -----------------------------
:: Basic Interface StatementsLOGII
PROTOCOL(X.75,HDLC,SLP)
DPORTS(4)
:: Host Statements
LINKHOSTNUMBER(0,823)
HOSTLINKS(823,0)
:>HOSTCOST not reported
HOSTPORTAVAILABILITY(0,0)
HOSTKEY(0)
ROTATELINKS(off)
ADRPOS(4)
:: Link Level Statements for Link 0
LINKLU(0,0)
: Hardware Level Statements
HDWOPT(-NOCLK)
: Frame Level Statements
PSADR(3,1)
K(7)
MAXK(7)
N2(10)
T1(30)
:>FMLT0, not FML protocol
:>FMLTD, not FML protocol
:>FMLTM, not FML protocol
IDLELINE(60,20)
:>ILRR not configured, extra RR response will not be sent
:>ILRRC not configured, RR commands will not be sent
FRMOPT(-FM128,-DWDSC)
: Packet Level Statements
LINKBIAS(1)
CCNL(0,512)
PCNL(NONE)
ICNL(NONE)
TCNL(NONE)
OCNL(NONE)
T30(60,3)
T31(180)
T32(60,3)
T33(60,3)
ODNIC(3106)
:>CHKCLG not configured, calling address in call request not checked
CLDADL(14)
NETUSERNAMEPREFIX(X75.)
PKTOPT(-PM128,-HILCN,ZCAUS,-IPRNR,-NONTN,TKSUP,-BRFCA,-TKDSP,-TRGPF,PCAUSE,NODIAG,-NOEEDO)
CKRESPADRS(-NOCLD,-NOCLG)
: Optional User Facilities
PWIND(2,2,NEGOTIATION)
PSIZE(128,128,NEGOTIATION)
MAXPSIZE(128,128)
TCLASS(10,10,,NEGOTIATION,-XCLEAR,-PASSTOX)
:>TCTOPW not used
:>TCTOPS not used
:>TCTOSC not used
TCTCSI(1,1,1,1,1,2,2,3,3,4,4,4,4,4,4)
CSITTC(6,7,9,11)
CHARGE(CPT,-RCX,-RCNA,-CPNA,-RCNS,-LCP,-XCLEAR)
FASTSELECT(SUBSCRIPTION,ACCEPTANCE)
CUG(SUBSCRIPTION,INCOMING,OUTGOING)
RPOA(-PASSTOX)
CALLID(CIDCHECK)
TRAFFICLASS(-XCLEAR,-PASSTOX)
NATIONAL(-XCLEAR,PASSTOX,-PASSINV,-PASSHST,-PASSCCT)
UNKNOWNFACILITY(-XCLEAR,PASSTOX)
FACOPT(-LASTSEEN,-NO84,-NONUI,-NORPOA,-INBAR,-OUTBAR)
TYMCALL(-UNAME,-CCT,-PORT,-TIME)
ONREGIST(-SUBSCRIPTION,-NOREG)
:>no GATEWAYs or RPOAGATEWAYs USED
: Pad Options
CLGADR(-NUIADR,HOSTADR)
CUDSTRING() :CUDSTRING or CUDUSERNAME
INPARITY(SAVE)
PADOPTIONS(-NECHO,-NCRLF,-NLFCR,-HCRLF,-HLFCR)
PADOPTIONS(-NR13,-NR14,-XONOF,-T2741,-U2741)
PADIDLETIME(60,20)
PADFORWARD(126,126)
PADBREAK(21,-1)
PADNATIONAL(0,-NOPASS)
ECHOABLE(8,0A,0D,20-7E)
UKa(-TX3,-TADR,-TPID,-TFAC,-TCAP)
DATAPAC(-DX3,-DTAR)
: Log Report Statements
LOGINTERVAL(8)
LOGREPORTS(OFF,10-39,80-0AA)
:: Global Statements
DNICID(3106,1)
HIHOSTNUMBER(20000)
SEGAC(64)
DNICNODES(3106)
TALKOLDCODE(OFF)
:>INFOSWITCH not configured
L1ENABLE(OFF)
:: Global Storage Allocation Statements
MAXGATEWAYS(0)
RCVSECTORS(16)
BUFFERPOOL(4802)
MAXHOSTS(1)
MAXODNIC(1)
MAXDNICNODES(0)
MAXCUGINDEX(16)
MAXTORPOA(0)
MAXADRLINKS(0)
THROUGHPUTCLASSTABLES(OFF)
FSLTCODE(OFF)
CUGCODE(OFF)
COSTCODE(OFF)
TELCODE(OFF)
DPACODE(OFF)
PVCCODE(OFF)
:: XOM Statements
XOMUSERNAME(XRAY)
XOMHOST(823)
Macros used in X25 configuration
LOGII
PROTOCOL(X.75,HDLC,SLP,)
DPORTS(4)
LINKHOSTNUMBER(0,0823)
HOSTLINKS(0823,0,,,,,,,,,,,,,,)
LINKS(0,,,,,,,,,,,,,,,)
PSADR(03,01)
K(7)
MAXK(7)
N2(10)
T1(30)
FRMOPT(-FM128,-DWDSC)
PKTOPT(-PM128,+ZCAUS,+TKSUP,+PCAUSE,,,,,,,,)
TCNL(0,512)
DFLADR(NONE,,,+NOCRI,+NOICI)
PWIND(2,2,+NEGOTIATION,)
PSIZE(128,128,+NEGOTIATION,-XCLEAR)
TCLASS(10,10,+NEGOTIATION,-XCLEAR,-PASSTOX)
CHARGE(-XCLEAR,-RCNA,-RCNS,-CPNA,+CPT,-RCX,-LCP)
FASTSELECT(+SUBSCRIPTION,+ACCEPTANCE)
CUG(+SUBSCRIPTION,+INCOMING,+OUTGOING,-PREFOC)
CALLID(+CIDCHECK)
NATIONAL(-XCLEAR,+PASSTOX,-PASSINV,,)
UNKNOWNFACILITY(-XCLEAR,+PASSTOX)
FACOPT(-LASTSEEN,-NO84,-NONUI,-NORPOA,-INBAR,-OUTBAR,)
CLGADR(-NUIADR,+HOSTADR)
CUDSTRING()
PADIDLETIMER(60,20)
PADFORWARD(126,126)
PADBREAK(21,)
PADNATIONAL(00,-NOPASS)
ECHOABLE(08,0A,0D,20-7E,,,,,,,,,,,,)
LOGINTERVAL(8)
LOGREPORTS(OFF,24-39,,,,,,,,,,,,,,)
MTEXT(0001,"8A"8DNTSNET: )
SEGAC(64)
DNICID(3106,1,,,,,,,,,)
XOMUSERNAME(XRAY)
Appendix D 1984 per-call facility fields
| 43 | 01000010 | packet size |
| 43 | 01000010 | packet size |
| 02 | 00000010 | throughput class negotiation |
| 03 | 00000011 | Closed user group selection |
| 47 | 01000111 | Closed user group selection.extended |
| 09 | 00001001 | Closed user group outgoing access |
| 48 | 01001000 | Closed user group outgoing access ext |
| 41 | 01000001 | Bilateral Closed user group |
| 01 | 00000001 | Reverse charge/fast select |
| C6 | 11000110 | Network User Identification (NUI) |
| 04 | 00000100 | Charging Information - req to receive |
| C2 | 11000010 | Charging Information - duration |
| C1 | 11000001 | Charging Information - segment count |
| 44 | 01000100 | RPOA selection facility |
| C4 | 11000100 | RPOA selection facility.Extended |
| D1 | 11010001 | Call deflection selection |
| C3 | 11000011 | Call redirection notification |
| C3 | 11000011 | Call redirection notification |
| 49 | 01001001 | Transit Delay Selection and indication |
| 00 | 00000000 | Marker 000F = DTE facility marker |
| CB | 11001011 | Calling Address extension facility |
| C9 | 11001001 | Called Address extension facility |
| 0A | 00001010 | Minimum Throughput Class |
| CA | 11001010 | End-to-end transit delay |
| D2 | 11010010 | Priority facility |
| D3 | 11010011 | Protection facility |
| 0B | 00001011 | Expidited data negotiation facility |
Appendix E clear causes
The call can be cleared by either end (or in case of faults by the network)
at any time during the call.
The CLEAR packet contains a 2 byte data field containing the cause and diagnostic
bytes, these bytes give the reason for the clear and are therefore very useful
for finding faults.
The first byte is the cause byte and is coded as shown below.
| code | clear cause |
| HEX | |
| 00 | DTE clearing |
| 01 | Number busy |
| 03 | Invalid call |
| 05 | Network congestion |
| 09 | Out of order - clear clear |
| 0B | Access barred |
| 0D | Not obtainable |
| 11 | Remote procedure error clear |
| 11 | incompatrocedure error clear |
| 13 | Local procedure error |
| 15 | RPOA out of order |
| 19 | Reverse charging not subscribed to |
| 21 | DTE incompatible call |
| 29 | Fast select not subscribed to |
| 39 | Ship absent ....................... *** new for rel 4 |
| 80-FF | DTE ............................... *** new for rel 4 |
| code | Reset cause |
| HEX | |
| 00 | DTE clearing |
| 01 | out of order |
| 03 | remote procedure error |
| 05 | local procedure error |
| 07 | Network cogestion Reset |
| 09 | Remote DTE operational - reset reset |
| 0F | Network operational |
| 11 | incompatible destination |
| 1D | Network out of order |
| 80-FF | DTE ............................... *** new for rel 4 |
| code | Restart cause |
| HEX | |
| 01 | local procedure error |
| 03 | network congestion |
| 07 | network operational |
| 7F | registration/cancellation confirmed *** not UKa |
| code | Registration cause *** not supported by UKa |
| HEX | |
| 03 | remote procedure error |
| 05 | network congestion |
| 13 | local procedure error |
| 7F | registration/cancellation confirmed |
Appendix F - Clear diagnostics
| 000 | H01 | No additional information | |
| 001 | H01 | INVALID P(S) | RESET |
| 002 | H02 | INVALID P(R) | RESET |
| 016 | H10 | packet type invalid (general) | ** new |
| 017 | H11 | PACKET TYPE INVALID FOr STATE r1 | RESTART |
| 018 | H12 | PACKET TYPE INVALID FOR STATE r2 | RESTART |
| 019 | H13 | PACKET TYPE INVALID FOR STATE r3 | RESTART |
| 020 | H14 | PACKET TYPE INVALID FOR STATE p1 | CLEAR |
| 021 | H15 | PACKET TYPE INVALID FOR STATE p2 | CLEAR |
| 022 | H16 | PACKET TYPE INVALID FOR STATE p3 | CLEAR |
| 023 | H17 | PACKET TYPE INVALID FOR STATE p4 | CLEAR |
| 024 | H18 | PACKET TYPE INVALID FOR STATE p5 | RESET |
| 025 | H19 | PACKET TYPE INVALID FOR STATE p6 | CLEAR |
| 026 | H1A | PACKET TYPE INVALID FOR STATE p7 | CLEAR |
| 027 | H1B | PACKET TYPE INVALID FOR STATE d1 | RESET |
| 028 | H1C | PACKET TYPE INVALID FOR STATE d2 | RESET |
| 029 | H1D | PACKET TYPE INVALID FOR STATE d3 | RESET |
| 032 | H20 | PACKET NOT ALLOWED | |
| 033 | H21 | UNIDENTIFIABLE PACKET | |
| 034 | H22 | CALL ON ONE-WAY LOGICAL CHANNEL | CLEAR |
| 035 | H23 | INVALID PACKET TYPE ON PVC | RESET |
| 036 | H24 | PACKET ON UNASSIGNED LCN | CLEAR |
| 037 | H25 | REJECT NOT SUBSCRIBED TO | RESET |
| 038 | H26 | PACKET TOO SHORT | RESET |
| 039 | H27 | PACKET TOO LONG | RESET |
| 040 | H28 | INVALID GFI | CLEAR |
| 041 | H29 | RESTART WITH NON-ZERO BITS 4-15 | |
| 042 | H2A | PACKET TYPE NOT COMPATIBLE WITH FAC | ILITY CLEAR |
| 043 | H2B | UNAUTHORISED INTERRUPT CONF | RESET |
| 044 | H2C | UNAUTHORISED INTERRUPT | RESET |
| 045 | H2D | unauthorised reject | *** not supported |
| 048 | H30 | timer expired (general) | *** new |
| 049 | H31 | TIMER EXPIRED; INCOMING CALL | |
| 050 | H32 | TIMER EXPIRED; CLEAR INDICATION | |
| 051 | H33 | TIMER EXPIRED; RESET INDICATION | |
| 052 | H34 | TIMER EXPIRED; RESTART ind/req | |
| 064 | H40 | UNSPECIFIED CALL SET-UP PROBLEM | CLEAR |
| 065 | H41 | FACILITY CODE NOT ALLOWED | CLEAR |
| 066 | H42 | FACILITY PARAMETER NOT ALLOWED | CLEAR |
| 067 | H43 | INVALID CALLED ADDRESS | CLEAR |
| 068 | H44 | INVALID CALLING ADDRESS | CLEAR |
| 069 | H45 | invalid facility/registration lengt | h *** not nr4 |
| 070 | H46 | incoming call barred | *** not nr4 |
| 071 | H47 | no logical channel available | *** not nr4 |
| 072 | H48 | call collision | *** not nr4 |
| 073 | H49 | duplicate facility/utility requeste | d *** not nr4 |
| 074 | H4A | non-zero address length | *** not nr4 |
| 075 | H4B | non-zero facility length | *** not nr4 |
| 076 | H4C | facility/utility not provided when | expected not nr4 |
| 077 | H4D | invalid CCITT - specified DTE facil | ity *** not nr4 |
| 080 | H50 | miscellaneous | *** not nr4 |
| 081 | H51 | improper cause code from DTE | *** not nr4 |
| 082 | H52 | not aligned octet | *** not nr4 |
| 083 | H53 | inconsistent Q-bit setting | |
| 96-103 X.75 only | |||
| 096 | H60 | international call setup/clearing p | roblem *** new |
| 097 | H61 | unknown calling DNIC | *** new |
| 098 | H62 | TNIC mismatch | *** new |
| 099 | H63 | call identifier mismatch | *** new |
| 100 | H64 | negotiation error in Utility parame | ter value *** new |
| 101 | H65 | invalid utility length | *** new |
| 102 | H66 | non-zero utility length | *** new |
| 103 | H67 | M-bit violation | *** new |
| 112 | H70 | international problem (general) | *** not nr4 |
| 113 | H71 | remote network problem | *** not nr4 |
| 114 | H72 | international protocol problem | *** not nr4 |
| 115 | H73 | international link out of order | *** not nr4 |
| 116 | H74 | international link busy | *** not nr4 |
| 117 | H75 | transit network facility problem | *** not nr4 |
| 118 | H76 | remote network facility problem | *** not nr4 |
| 119 | H77 | international routing problem | *** not nr4 |
| 120 | H78 | temporary routing problem | *** not nr4 |
| 121 | H79 | unknown called DNIC | *** not nr4 |
| 122 | H7A | maintenance action (national/international) | *not nr4 |
| Tele | net | diagnostics | |
| 128 | H80 | Proto clearing - standard clearing cause | |
| 129 | H81 | not used | |
| 130 | H82 | subline down | |
| 131 | H83 | unable to reformat packet | |
| 132 | H84 | No slave side for call accept packet | |
| 133 | H85 | packet received with X.25 line in wrong state | |
| 134 | H86 | insufficient buffers to complete call | |
| 135 | H87 | timer expired | |
| 136 | H88 | interrupt confirmation received while no outstanding interrupts | |
| 137 | H89 | P(s) received from slave not equal to what proto expects | |
| 138 | H8A | not used - reserved for proto | |
| ... | |||
| 143 | H8F | not used - reserved for proto | |
| 144 | H90 | DTE/DCE CONGESTION | RESET |
| 145 | H91 | RECEIVED FAST SELECT CLEAR REQUEST | |
| 146 | H92 | LINE RESTARTING BY DEBUG COMMAND | RESTART |
| 147 | H93 | invalid restart confirm in state R3 | *** new |
| 148 | H94 | looped trunk lines detected | *** new |
| 149 | H95 | invalid length trunk restart | *** new |
| 150 | H96 | call quota distribution clear | *** new |
| 151 | H97 | reconnect multiple race | *** new |
| 152 | H98 | reconnect race timeout at destinati | on *** new |
| 153 | H99 | VH call to DTE which isnt a VH | *** new |
| 154 | H9A | requires security key | *** new |
| 155 | H9B | non-matching security key | *** new |
| 156 | H9C | DNIC utility barred | *** new |
| 157 | H9D | Local charging prevention | *** new |
| 158 | H9E | Invalid Traffic priority | *** new |
| 159 | H9F | Network table overflow | *** new |
| 160 | HA0 | NON-ZERO RESET CAUSE FROM DTE | RESET |
| 161 | HA1 | DATA PACKET TOO LONG | RESET |
| 162 | HA2 | INTERRUPT PACKET TOO LONG | RESET |
| 163 | HA3 | INT PACKET TOO SHORT; NO USERDATA | RESET |
| 164 | HA4 | INT CONFIRMATION PACKET TOO LONG | RESET |
| 165 | HA5 | RR PACKET TOO LONG | RESET |
| 166 | HA6 | RNR PACKET TOO LONG | RESET |
| 167 | HA7 | RESET PACKET TOO LONG | RESET |
| 168 | HA8 | RESET CONF PACKET TOO LONG | RESET |
| 169 | HA9 | INVALID `Q' BIT IN DATA PACKET | RESET |
| 170 | HAA | PACKET WINDOW RANGE EXCEEDED | RESET |
| 171 | HAB | UNABLE TO TRANSMIT PACKET | RESET |
| 172 | HAC | `Q' BIT SET IN NON-DATA PACKET | RESET |
| 173 | HAD | OUTSTANDING PACKET COUNT LESS THAN | ZERO RESET |
| 174 | HAE | RETRANSMISSION queue ERROR | RESET |
| 175 | HAF | RESET PACKET TOO SHORT (NO CAUSE) | RESET |
| 176 | HB0 | REJECT PACKET TOO LONG | RESET |
| 177 | HB1 | INVALID 1D PACKET | RESET |
| 178 | HB2 | UNSUCCESSFUL RECONNECTION RESNC | CLEAR |
| 179 | HB3 | NON-RECONNECT CALL IN STATE C1 | CLEAR |
| 180 | HB4 | SECOND 1D PACKET FROM DTE | CLEAR |
| 181 | HB5 | BAD DATA TRANSFER STATE IN RECONNEC | T CLEAR |
| 182 | HB6 | PACKET FORMAT INVALID | CLEAR |
| 183 | HB7 | FACILITY BYTE COUNT TOO LARGE | CLEAR |
| 184 | HB8 | INVALID PACKET DETECTED | CLEAR |
| 185 | HB9 | FACILITY/UTILITY FIELD BYTE COUNT > | 109 CLEAR was 63 |
| 186 | HBA | OUTGOING CALLS BARRED | CLEAR |
| 187 | HBB | INCOMING CALLS BARRED | CLEAR |
| 188 | HBC | CLEARING OF PVC | CLEAR |
| 189 | HBD | CALLED ADDRESS TOO LONG | CLEAR |
| 190 | HBE | CALLED ADDRESS TOO SHORT | CLEAR |
| 191 | HBF | CALLING ADDRESS TOO LONG | CLEAR |
| 192 | HC0 | CALLING ADDRESS TOO SHORT | CLEAR |
| 193 | HC1 | BCD ERROR IN CALL ADDRESS | CLEAR |
| 194 | HC2 | BCD ERROR IN CALLING ADDRESS | CLEAR |
| 195 | HC3 | USER DATA FIELD TOO LONG | CLEAR |
| 196 | HC4 | NO BUFFER AVAILABLE | CLEAR |
| 197 | HC5 | LOCAL DTE IS NOT ENHANCED | CLEAR |
| 198 | HC6 | FACILITY NEGOTIATION INVALID | CLEAR |
| 199 | HC7 | MANDATORY UTILITY NOT present | CLEAR |
| 200 | HC8 | quarter BUFFER NO AVAILABLE FOR TNI | C CLEAR |
| 201 | HC9 | OVERFLOW OF TNIC IN BUFFER | CLEAR |
| 202 | HCA | DTE LINE CONGESTED | CLEAR |
| 203 | HCB | TABLE ERROR IN PACKET PROCEDURES | |
| 204 | HCC | INSERT TABLE OVERFLOW | |
| 205 | HCD | DELETE TABLE OVERFLOW (extended XLB | not present) |
| 206 | HCE | call forward procedure error | ** new |
| 207 | HCF | call forward reset | ** new |
| 208 | HD0 | TRUNK LINE RESTART | RESTART |
| 209 | HD1 | INVALID EVENT IN STATE p2 | |
| 210 | HD2 | INVALID EVENT IN STATE p3 | |
| 211 | HD3 | INVALID 1D EVENT IN STATE d1 | |
| 212 | HD4 | CALL COLLISION ON TRUNK LINE | |
| 213 | HD5 | NO BUFFER AVAILABLE for EXCB | |
| 214 | HD6 | CALL COLLISION ON DTE LINE | |
| 215 | HD7 | DTE RESTART | |
| 216 | HD8 | CALL REQUEST TO TRUNK LINE Timed OU | T |
| 217 | HD9 | RECONNECT SET-UP TIMED OUT | |
| 218 | HDA | INVALID OUTPUT SIDE STATE | |
| 219 | HDB | ERROR DETECTED IN BLINK PACKET QUEU | E PROCEDURE |
| 220 | HDC | RESET INDICATION RETRANSMISSION COU | NT EXPIRED |
| 221 | HDD | INVALID OUTPUT SIDE STATE | |
| 222 | HDE | BLIND BUFFER QUEUE OVERFLOW IN STAT | E d4 |
| 223 | HDF | BLIND BUFFER QUEUE OVERFLOW IN STAT | E c1 |
| 224 | HE0 | BLIND BUFFER QUEUE OVERFLOW IN STAT | E c2 |
| 225 | HE1 | CLEAR PACKET BYTE COUNT TOO LARGE O | R TOO SMALL |
| 226 | HE2 | NON-ZERO CLEAR CAUSE | |
| 227 | HE3 | CLEAR CONF PACKET BYTE COUNT TOO SM | ALL OR TOO LARGE |
| 228 | HE4 | CALL COLLISION | |
| 229 | HE5 | INVALID TP LOAD REQUEST CALL PKT | |
| 230 | HE6 | MAXIMUM HOPCOUNT EXCEEDED | |
| 231 | HE7 | ROUTING LOOP DETECTED | |
| 232 | HE8 | PVC CALL REQUEST FAILURE | |
| 233 | HE9 | RECONNECT CALL REQUEST FAILED | |
| 234 | HEA | NO LC AVAILABLE ON OUTPUT XLB | |
| 235 | HEB | NO BUFFER AVAILABLE for txcb | |
| 236 | HEC | CALL REDIRECTION CLEAR | |
| 237 | HED | NO PATH ROUTE CALL | |
| 238 | HEE | CALL ROUTED TO DTE LINE | |
| 239 | HEF | CALL CANNOT BE REROUTED | |
| 240 | HF0 | ADDRESS NOT IN ROUTING TABLES | |
| 241 | HF1 | ROUTING TABLE CHANGE DURING CALL RO | UTING |
| 242 | HF2 | NO LC AVAILABLE ON FAKE TRUNK line | |
| 243 | HF3 | REMOTE DTE DOWN ON A PVC | |
| 244 | HF4 | INVALID EVENT DETECTED no xxcb or n | o call |
| 245 | HF5 | INVALID PACKET RECEIVED; STATE d4 | |
| 246 | HF6 | INVALID PACKET RECEIVED; STATE d5 | |
| 247 | HF7 | INVALID PACKET RECEIVED; STATE p8 | |
| 248 | HF8 | INTERNAL PROCESSING FAILURE getarea | fail |
| 249 | HF9 | INVALID RESTART INDICATION | |
| 250 | HFA | LINE STATUS CHANGE IN STATE r5 dow | n>up |
| 251 | HFB | INVALID PACKET RECEIVED; STATE r5 | |
| 252 | HFC | INVALID PACKET RECEIVED; STATE r4 | |
| 253 | HFD | LINE STATUS CHANGE IN STATE r3 up>d | own |
| 254 | HFE | LINE STATUS CHANGE IN STATE r2 up>d | own |
| 255 | HFF | LINE STATUS CHANGE IN STATE r1 up>d | own |
cat abc.dif
:: CCITT DEFINED DIAGNOSTIC CODES.
| DIA000 | EQ | $A00 | :NO ADDITIONAL INFO | |||||
| DIA001 | EQ | $A01 | :INVALID P(S) | |||||
| DIA002 | EQ | $A02 | :INVALID P(R) | |||||
| DIA016 | EQ | $A16 | :INVALID PACKET TYPE (GENERIC) | |||||
| DIA017 | EQ | $A17 | :ON PACKET LEVEL READY STATE | |||||
| DIA018 | EQ | $A18 | :ON DTE RESTART STATE | |||||
| DIA019 | EQ | $A19 | :ON DCE RESTART STATE | |||||
| DIA020 | EQ | $A20 | :ON READY SATE | |||||
| DIA021 | EQ | $A21 | :ON DTE WAITING STATE | |||||
| DIA022 | EQ | $A22 | :ON DCE WAITING STATE | |||||
| DIA023 | EQ | $A23 | :ON DATA TRANSFER STATE | |||||
| DIA025 | EQ | $A25 | :ON DTE CLEAR STATE | |||||
| DIA026 | EQ | $A26 | :ON DCE CLEAR STATE | |||||
| DIA027 | EQ | $A27 | :ON FLOW CONTROL READY SATE | |||||
| DIA028 | EQ | $A28 | :ON DTE RESET STATE | |||||
| DIA029 | EQ | $A29 | :ON DCE RESET STATE | |||||
| DIA032 | EQ | $A32 | :PACKET NOT ALLOWED (GENERIC) | |||||
| DIA033 | EQ | $A33 | :UNIDENTIFIABLE PACKET | |||||
| DIA034 | EQ | $A34 | :CALL ON ONE WAY LOGICAL CHANNEL | |||||
| DIA035 | EQ | $A35 | :INVALID PACKET TYPE ON PVC | |||||
| DIA036 | EQ | $A36 | :PACKET ON UNASSIGNED LOGICAL CHANNEL | |||||
| DIA037 | EQ | $A37 | :REJECT NOT SUBSCRIBED TO | |||||
| DIA038 | EQ | $A38 | :PACKET TOO SHORT | |||||
| DIA039 | EQ | $A39 | :PACKET TOO LONG | |||||
| DIA040 | EQ | $A40 | :INVALID GENERAL FORMAT IDENTIFIER | |||||
| DIA041 | EQ | $A41 | :RESTART WITH NONZERO IN BITS 1-4, 9-16 | |||||
| DIA042 | EQ | $A42 | :PACKET TYPE NOT COMPATIBLE WITH FACILITY | |||||
| DIA043 | EQ | $A43 | :UNAUTHORIZED INTERRUPT COMFIRMATION | |||||
| DIA044 | EQ | $A44 | :UNAUTHORIZED INTERRUPT | |||||
| DIA045 | EQ | $A45 | :UNAUTHORIZED RESET, 1984, DRE 06-NOV-84 | |||||
| DIA048 | EQ | $A48 | :TIMER EXPIRED (GENERIC) | |||||
| DIA049 | EQ | $A49 | :FOR INCOMING CALL | |||||
| DIA050 | EQ | $A50 | :FOR CLEAR INDICATION | |||||
| DIA051 | EQ | $A51 | :FOR RESET INDICATION | |||||
| DIA052 | EQ | $A52 | :FOR RESTART INDICATION | |||||
| DIA053 | EQ | $A53 | :FOR CALL DEFLECTION, 1988 | DRE 1-FEB-89 | ||||
| DIA064 | EQ | $A64 | :CALL SETUP PROBLEM (GENERIC) | |||||
| DIA065 | EQ | $A65 | :FACILITY CODE NOT ALLOWED | |||||
| DIA066 | EQ | $A66 | :FACILITY PARAMETER NOT ALLOWED | |||||
| DIA067 | EQ | $A67 | :INVALID CALLED ADDRESS | |||||
| DIA068 | EQ | $A68 | :INVALID CALLING ADDRESS | |||||
| DIA069 | EQ | $A69 | :INVALID FACILITY/REG LENGTH, 1984, DRE 06-NOV-84 | |||||
| DIA070 | EQ | $A70 | :INCOMING CALL BARRED, 1984, DRE 06-NOV-84 | |||||
| DIA071 | EQ | $A71 | :NO CHANNEL AVAILABLE, 1984, DRE 06-NOV-84 | |||||
| DIA072 | EQ | $A72 | :CALL COLLISION, 1984, DRE 06-NOV-84 | |||||
| DIA073 | EQ | $A73 | :DUPLICATE FACILITY, 1984, DRE 06-NOV-84 | |||||
| DIA074 | EQ | $A74 | :NON-ZERO ADDRESS LENGTH, 1984, DRE 06-NOV-84 | |||||
| DIA075 | EQ | $A75 | :NON-ZERO FACILITY LENGTH, 1984, DRE 06-NOV-84 | |||||
| DIA076 | EQ | $A76 | :FACILITY EXPECTED, 1984, DRE 06-NOV-84 | |||||
| DIA077 | EQ | $A77 | :INVALID DTE FACILITY, 1984, DRE 06-NOV-84 | |||||
| DIA078 | EQ | $A78 | :MAXIMUM REDIRECTIONS OR DEFLECTIONS EXCEEDED, 1988 | DRE 1-FEB-89 | ||||
| DIA080 | EQ | $A80 | :MISCELLANEOUS, 1984, DRE 06-NOV-84 | |||||
| DIA081 | EQ | $A81 | :IMPROPER CAUSE CODE, 1984, DRE 06-NOV-84 | |||||
| DIA082 | EQ | $A82 | :NON_OCTET ALIGNED, 1984, DRE 06-NOV-84 | |||||
| DIA083 | EQ | $A83 | :INCONSISTANT Q-BIT SETTING, 1984, DRE 06-NOV-84 | |||||
| DIA084 | EQ | $A84 | :NUI PROBLEM ,1988, DRE 1-29-89 | |||||
| DIA096 | EQ | $A96 | :INT CALL SET-UP OR CLEARING PROB, X75, 1984, DRE 06-NOV-84 | |||||
| DIA097 | EQ | $A97 | :UNKNOWN CALLING DNIC, X75, 1984, DRE 06-NOV-84 | |||||
| DIA098 | EQ | $A98 | :TNIC MISMATCH, X75, 1984, DRE 06-NOV-84 | |||||
| DIA099 | EQ | $A99 | :CALL IDENTIFIER MISMATCH, X75, 1984, DRE 06-NOV-84 | |||||
| DIA100 | EQ | $A100 | :NEGOTATION ERROR IN UTILITY PARAMETER | |||||
| :VALUE, X75, 1984, DRE 06-NOV-84 | ||||||||
| DIA101 | EQ | $A101 | :INVALID UTILITY LENGTH, X75, 1984, DRE 06-NOV-84 | |||||
| DIA102 | EQ | $A102 | :NON-ZERO UTILITY LENGTH, X75, 1984, DRE 06-NOV-84 | |||||
| DIA103 | EQ | $A103 | :M-BIT VIOLATION, X75, 1984, DRE 06-NOV-84 | |||||
| DIA112 | EQ | $A112 | :INTERNATIONAL PROBLEMS, 1984, DRE 06-NOV-84 | |||||
| DIA113 | EQ | $A113 | :REMOTE NETWORK PROBLEM, 1984, DRE 06-NOV-84 | |||||
| DIA114 | EQ | $A114 | :INT PROTOCOL PROBLEM, 1984, DRE 06-NOV-84 | |||||
| DIA115 | EQ | $A115 | :INT LINK OUT OF ORDER, 1984, DRE 06-NOV-84 | |||||
| DIA116 | EQ | $A116 | :INT LINK BUSY, 1984, DRE 06-NOV-84 | |||||
| DIA117 | EQ | $A117 | :TRANSIT NET FACILITY PROBLEM, 1984, DRE 06-NOV-84 | |||||
| DIA118 | EQ | $A118 | :REMOTE NET FACILITY PROBLEM, 1984, DRE 06-NOV-84 | |||||
| DIA119 | EQ | $A119 | :INT ROUTING PROBLEM, 1984, DRE 06-NOV-84 | |||||
| DIA120 | EQ | $A120 | :TEMP ROUTING PROBLEM, 1984, DRE 06-NOV-84 | |||||
| DIA121 | EQ | $A121 | :UNKNOWN CALLED DNIC, 1984, DRE 06-NOV-84 | |||||
| DIA122 | EQ | $A122 | :MAINTENANCE ACTION, 1984, DRE 06-NOV-84 | |||||
| :: | NETWORK SPECIFIC DIAGNOSTIC CODES (128-) | |||||||
| DIA128 | EQ | $A128 | :INTERNAL MULFUCTION: | |||||
| : | :DPORT NOT ASSIGNED WHEN PROCESSING DATA PKT | |||||||
| : | DPORT NOT ASSIGNED WHEN PROCESSING LEV1 PKT | |||||||
| DIA129 | EQ | $A129 | :MEANING DEPENDING ON CAUSE CODE | |||||
| DIA130 | EQ | $A130 | :MEANING DEPENDING ON CAUSE CODE | |||||
| DIA131 | EQ | $A131 | :BAD MUD SUP MSG RECEIVED | |||||
| DIA133 | EQ | $A133 | :NO HOST SUP MSG RECEIVED | |||||
| DIA134 | EQ | $A134 | :MUD ERROR SUP MSG RECEIVED | |||||
| DIA135 | EQ | $A135 | :CALLING ADDRESS DOES NOT MATCH CHKCLG(adr) | |||||
| DIA136 | EQ | $A136 | :RCVD CALL REQUEST ON DTE CLEAR STATE (X.75) | |||||
| DIA137 | EQ | $A137 | : ---- RESERVED ---- | |||||
| DIA138 | EQ | $A138 | :LOGIN ERROR | |||||
| DIA139 | EQ | $A139 | :LOGIN ERROR - "ERROR, TYPE USERNAME" RCVD | |||||
| DIA140 | EQ | $A140 | :RECEIVED CLEAR WHEN GETTING NEEDLE RESPONSE | |||||
| DIA141 | EQ | $A141 | :AUX CIRCUIT TIME OUT WHILD SENDING CALL ACCEPT | |||||
| DIA142 | EQ | $A142 | :LOGIN TIME OUT | |||||
| DIA143 | EQ | $A143 | :INFOSWITCH- CALL ACCEPT TIME OUT | |||||
| DIA144 | EQ | $A144 | :BREAK GENERATED RESET | |||||
| : | THE FOLLOWING IS REPLACED BY 1984 CODE 117 OR 118 | |||||||
| :DIA145 EQ | $A145 | :ILLEGAL FACILITY REQUEST (X.75) | ||||||
| DIA146 | EQ | $A146 | :NON CCITT DEFINED PROTOCOL ID | |||||
| : | :OR PROTOCOL ID FIELD TOO SHORT | |||||||
| :THE FOLLOWING IS OBSOLETE | DRE 22-NOV-85 | |||||||
| :DIA147 EQ | $A147 | :CALL USER DATA FIELD IN CALL ACCEPT | ||||||
| : | (FAST SELECT NOT IMPLEMENTED) | |||||||
| DIA148 | EQ | $A148 | :DIALECT RESPONSE NOT RECOGNIZABLE/ | |||||
| : | :CANNOT ACCEPT ANY DIALECT CHOICES OFFERED | |||||||
| : | THE FOLLOWING HAS BEEN REPLACED BY 1984 CODE 83 | |||||||
| :DIA149 EQ | $A149 | :Q BIT VIOLATION | ||||||
| : | :LAST PACKET M=1,Q=1, BUT THIS HAS Q=0, | |||||||
| : | :LAST PACKET Q=0,M=1, BUT THIS HAS Q=1 | |||||||
| :THIS SHOULD BE INVALID GFI (DIAGNOSTIC 40) | DRE 22-NOV-1985 | |||||||
| :DIA150 EQ | $A150 | :Q BIT SET ON NON DATA PACKET | ||||||
| :THIS SHOULD HAVE BEEN DIAGNOSTIC 38 | DRE 22-NOV-1985 | |||||||
| :DIA151 EQ | $A151 | :CALL USER DATA FIELD TOO LONG, >16 FOR | ||||||
| : | NON-FAST SELECT, >128 FOR FAST SELECT | |||||||
| DIA152 | EQ | $A152 | :DATA LOST IN NETWORK, RCVD BLK BALL OR GRY BALL | |||||
| : | DIA153 TO DIA168 | LOGON FAILURE OR PSEUDO-NEEDLE REJECT | ||||||
| : | REASON FOR FAILURE: | |||||||
| DIA153 | EQ | $A153 | :ISIS OR NODE UNABLE TO COMPLETE REQUEST | |||||
| DIA154 | EQ | $A154 | :FORMAT ERROR | :HJR-SWBT1 | ||||
| : 155 | :BAD USER NAME | |||||||
| DIA156 | EQ | $A156 | :BAD MUD | :HJR-SWBT1 | ||||
| : 157 | :SYSTEM UNAVAILABLE | |||||||
| : 158 | :DOWN-LINE LOAD OR DIAL-OUT FAILURE | |||||||
| : 159 | :TIMEOUT | |||||||
| DIA160 | EQ | $A160 | :ACCESS NOT PERMITTED | :HJR-SWBT1 | ||||
| DIA161 | EQ | $A161 | :OUT OF ORIGINATION PORTS | :HJR-SWBT1 | ||||
| DIA162 | EQ | $A162 | :TRY AGAIN LATER | :HJR-SWBT1 | ||||
| DIA163 | EQ | $A163 | ||||||
| DIA164 | EQ | $A164 | :WHEN CAUSE 0, AN ISIS HANG MSG IS SENT TO | |||||
| :PHYSICALLY DISCONNECT THE LINE ON A CLEAR PKT | ||||||||
| DIA165 | EQ | $A165 | :BAD REQUESTING HOST NUMBER | :HJR-SWBT1 | ||||
| DIA166 | EQ | $A166 | :REQUESTING HOST NOT UP ON THIS NODE :HJR-SWBT1 | |||||
| : | ||||||||
| DIA169 | EQ | $A169 | :A DSP DIALECT CHOICE WAS OFFERED, BUT | |||||
| : | IT WAS ANOT A DSP CALL | |||||||
| DIA170 | EQ | $A170 | :X TO X (TURKEY) LEVEL RESPONSE GREATER THAN OUR LEVEL | |||||
| DIA171 | EQ | $A171 | :A DSP CALL DID NOT GET DSP DIALECT OFFERED | |||||
| : | AS A IIX DIALECT COMMAND CHOICE | |||||||
| DIA172 | EQ | $A172 | :BUFFER ZAP OCCURED FOR THIS CHANNEL | |||||
| DIA173 | EQ | $A173 | :CALL RESET - UNAVAILABLE PMP BLOCK | |||||
| DIA174 | EQ | $A174 | :ERROR IN RECEIVED CLEAR REQUEST PACKET | |||||
| DIA175 | EQ | $A175 | :RCVD ILLEGALY FORMATTED INTERNAL MSG | |||||
| DIA176 | EQ | $A176 | :RCVD UNIMPLEMENTED GLOBAL IIX MESSAGES | |||||
| : | THIS DAIGNOSTIC HAS BEEN REPLACED BY 1984 CODE 122 | |||||||
| :DIA177 EQ | $A177 | :XOM OPERATOR BROUGHT PACKET LEVEL DOWN | ||||||
| DIA178 | EQ | $A178 | :REC'VD RPOA FOUND IN ODNIC | |||||
| : | THIS DAIGNOSTIC HAS BEEN REPLACED BY 1984 CODE 119 | |||||||
| :DIA179 EQ | $A179 | :RECEIVED UNKNOWN RPOA | ||||||
| DIA180 | EQ | $A180 | :RECEIVED ERRONEOUS CALL ACCEPT INTERNAL MSG | |||||
| DIA181 | EQ | $A181 | :NATIONAL OPTIONS IN CALL REQUEST | |||||
| DIA182 | EQ | $A182 | :OUTGOING CALLS BARRED WITHIN CUG, | |||||
| :OR CUG WITH NO OUTGOING ACCESS FACILITY | ||||||||
| DIA183 | EQ | $A183 | :INCOMING CALLS BARRED WITHIN CUG, | |||||
| :OR CUG WITH NO INCOMING ACCESS FACILITY | ||||||||
| : | THIS DIAGNOSTIC HAS BEEN REPLACED BY 1984 CODE 73 | |||||||
| :DIA184 EQ | $A184 | :DUPLICATED APPERANCE OF FACILITY CODE | ||||||
| DIA185 | EQ | $A185 | :REQUESTED PS NOT ACCEPTABLE IN FLOW NEGOTIATION | |||||
| DIA186 | EQ | $A186 | :REQUSTED WS NOT ACCEPTABLE IN FLOW NEGOTIATION | |||||
| DIA187 | EQ | $A187 | :NON EXISTENT CUG | |||||
| :THIS DIAGNOSTIC HAS BEEN REPLACED BY 1984 CODE 99 | ||||||||
| :DIA188 EQ | $A188 | :MISSING CALLL ID UTILITY IN CAL REQUEST PAKCET | ||||||
| DIA189 | EQ | $A189 | :DESTINATION DOES NOT UNDERSTAND CUG | |||||
| DIA190 | EQ | $A190 | :CALL REQUEST ON ALREADY ASSIGNED CHANNEL | |||||
| DIA191 | EQ | $A191 | :XOM WANTS NO MORE CALLS | |||||
| DIA192 | EQ | $A192 | :NO AVAILABLE INTERNAL PORT TO ASSGIN WHEN RCV CALL REQ | |||||
| DIA193 | EQ | $A193 | :NO MATCHED NATIONAL INTERLOCK CODE IN | |||||
| : CUGMAPPING MACRO | :SCY 25-Sep-84 | |||||||
| DIA194 | EQ | $A194 | :INVALID listno USED IN CUGMAPPING MACRO | |||||
| :SCY 25-Sep-84 | ||||||||
| DIA195 | EQ | $A195 | :DNIC OF CALLED ADDRESS IS NOT IN THE GOOD | |||||
| : CUGDNIC LIST | :SCY 25-Sep-84 | |||||||
| DIA196 | EQ | $A196 | :INVALID INTERLOCK CODE RECVD FROM ESPC 8C MSG | |||||
| :SCY 25-Sep-84 | ||||||||
| DIA197 | EQ | $A197 | :DNIC OF CALLING ADDRESS IS NOT IN THE GOOD | |||||
| : CUGDNIC LIST | :SCY 25-Sep-84 | |||||||
| DIA198 | EQ | $A198 | :NO MATCHED INTERNATIONAL INTERLOCK CODE IN | |||||
| : CUGMAPPING MACRO | :SCY 25-Sep-84 | |||||||
| DIA199 | EQ | $A199 | :DIAG. CODE FOR DCD OFF JH | |||||
| DIA200 | EQ | $A200 | :DIAG. CODE FOR LINE IDLE JH | |||||
| DIA201 | EQ | $A201 | :XLINK DTE DOES NOT RESPOND JH | |||||
| DIA202 | EQ | $A202 | :PAD REPORT PACKET WHICH ASYC. TERMINAL | |||||
| : | FAILS TO RESPONSE OR POWER GOES OFF JH | |||||||
| : | ||||||||
| :DIA203-9 | *** RESERVED FOR LOG-II *** | |||||||
| DIA203 | EQ | $A203 | :CIRCUIT REJECT CODE UNKNOWN | :HJR-SWBT1 | ||||
| DIA204 | EQ | $A204 | :NODE OUT OF BUFFERS | :HJR-SWBT1 | ||||
| :DIA205 | ||||||||
| DIA206 | EQ | $A206 | :SUPERVISOR PROBLEM | :HJR-SWBT1 | ||||
| DIA207 | EQ | $A207 | :NODE CODE NOT PRESENT | :HJR-SWBT1 | ||||
| : | ||||||||
| DIA210 | EQ | $A210 | :UNABLE TO SELECT LINK FOR INCOMING CALL :HJR 07-08-87 | |||||
| : | diags 211 to 220 reserved for BOC applications | |||||||
| IF | X.25 | |||||||
| DIA221 | EQ | $A30 | :ON-LINE REGISTRATION IN PROGRESS :JS-ONREG dre 3-1-89 | |||||
| DIA222 | EQ | $A79 | :LOGICAL CHANNEL RANGES OVERLAPPED, 1984, :JS-ONREG dre 3-1-89 | |||||
| (sts/stonek) - |
Appendix G - CCITT 84 changes
Link Level Changes
- a multilink facility has been added
- sequence numbers modulo 128 added - SABME introduced
- LAP protocol dropped, SARM and CMDR removed
- The rules for setting the P-bit in the SABM command and its response have been changed
- The collision rules have been expanded
- Out of sequence frame procedures have been changed
- The RNR procedures have been expanded
- The link resetting procedures have been expanded.
- definition of T2 and T3 added
- Maximum frame size must be greater than or equal 135 octets excluding flags and bit stuffing.
- The system must be able to transmit 263 octets if required by receiver.
- Support for 7 outstanding frames is now mandatory.
- A frame must now contain an integral number of octets
Packet Level Changes
- the datagram facility has been dropped
- A registration packet type has been introduced
- Out of order rules for PVCs have been introduced
- Two new maximum sizes for user data in a packet 2048 and 4096 have been added.
- The D-bit procedures have now been changed. The D-bit is used to indicate that the X25 has responsibility for end-to-end acknowledgement rather than the Transport protocol.
- The rules for use of the Q-bit have been tightened up.
- A facility to allow transit delay and selection has been added.
- The size of the facility length field has been increased from 6 to 8 bits and the maximum size of the facilities field from 63 to 128 octets.
- When used with the fast select facility, the restriction on the first 2 bits of the user data field have been removed.
- Clear request, Clear confirmation and Clear indication packets modified.
- The user data field length in the interrupt packet has been increased to 32 octets
- A "network out of order" reset cause has been added for PVCs.
- A registration cancel/confirm code has been added to the restart cause list.
- The separate definition of clear request for fast select has been dropped.
- The rules on CUGs have been amplified.
- CUG negotiation rules have been added.
- Fast select rules have been extended
- Charging rules have been added and extended
- Hunt groups have been added
- Call redirection has been added
- Reverse charging codes have been combined with fast select facility
- DTE facilities to support OSI
- the called and calling addresses have an extension to 48 digits
with the extra 32 digits coded in the facilities field
- throughput and end-to-end delay are defined
- expedited data is defined
X.75
Appendix H - CCITT 88 changes
Packet Level Changes
- Addition of a new optional user facility "long address acceptance" (agreed for a period of time) which provides for the use of a new format for the "address block" in call setup and clearing packets with bit 8 of the GFI is set to 1 in these packets.
- Addition of a call deflection capability consisting of two optional user
facilities:-
- Call deflection subscription (agreed for a period of time)
- Call deflection selection (per call)
- Revision of the Network User Identification (NUI) capability to include three optional user facilities:-
- NUI subscription (agreed for a period of time)
- NUI override (agreed for a period of time)
- NUI selection (per call)
- Revision of the RPOA text to explicitly distinguish the two optional user facilities:-
- RPOA subscription (agreed for a period of time)
- RPOA selection (per call)
- Modification of the CUG and CUGOA selection facilities use of basic and extended formats.
- Modification of the coding of the calling address extension and called address extension CCITT-specified DTE facilities.
- Addition of two new CCITT-specified DTE facilities:-
- priority (per call)
- protection (per call)
- Revision of a few actions taken by the DCE on receipt of errored packets.
- Clarification of the throughput class text.
- Clarification of the transit delay text.
- Clarification of the text on effects of the physical layer and data link layer on the packet layer.
- Addition of three new diagnostics :-
- #53 time expired for call deflection
- #78 maximum number of call redirections/deflections exceeded.
- #84 NUI problem
* Use of the term "packet layer" in place of the term "packet level"
Appendix I - proposed 1992 changes
----------------------------------
CCITT 1992
----------
Yes, I know we do not have 1984 or 1988 on the network, but if BT are going
to all the trouble and expense of attending CCITT meetings round the world then
their contribution should be based on the needs of Public Network (and our marketing strategy
- do we have one?). Also we should have the benefit of early warning of changes
to the standard.
So if you have any comments on the following proposals I will feed it back
to Andy Golthorpe.
My feeling is that most of these facilities add extra complexity without providing
any real benefit to BT or our customers. What we need is some stability so that
we can catch up with the standard. The Asynchronous framing of X.25 sounds interesting
(a proper grown up type of EPAD?) I could run X.25 on my PC without a special
synchronous card.
Also CCITT are doing a lot of work on OSI management services, which seems
to have implications for our business in managing private networks (CNA, BTView,
CONCERT or whatever its called).
As usual, I am probably meddling in things that are out of my depth, but I
think that since we may eventually have to operate then we should have a say
in how they are defined.
Here is Andy Goldthorpes report,
Martin Baker
================================================================
REPORT OF CCITT SGVII WORKING PARTY 2
5-16 FEBRUARY 1990
ISSUES WITH IMPACT ON Public Network
Source: Andy Goldthorpe,
1 Introduction
The meeting of WP2/SGVII in February raised a number of issues which are of
direct relevance to BT's Public Data Network (Public Network). It is important that those
business units that are interested in these issues are in a position to evaluate
their possible impact, and can assist in the formulation of a BT position for
the next WP2/SGVII meeting in November. This paper presents these issues and
some rationale for a BT position.
2 X.25 Layer 2
A contribution (W33) proposing multi-retransmission of I-frames was withheld
for study at the next meeting; a number of Administrations indicated that they
needed more time to discuss the proposal with their layer 2 experts.
The proposal is for multi-retransmission of I-frames in the period of timer
T1 time-out. T1 is not disabled, and normal retransmission occurs if no acknowledgement
is received in this period. However, the aim is to solicit an acknowledgement
before timer T1 time-out, and thus improve the utilization of the link.
Initial study of the proposal suggests that the same effect could be achieved
by simply reducing the value of timer T1. It may be useful for layer 2 experts
to look at this in more detail.
A contribution (W29) proposing the inclusion of asynchronous framing was accepted.
This is intended to mirror recent work in ISO on extensions to HDLC to support
asynchronous framing, the aim being to allow a greater user population to have
access to packet-mode services.
3 X.25 Layer 3
A contribution (W30) discussing length of facility fields led to agreement
to remove the maximum value of facilities fields, and the addition of a new
maximum value for length of call set-up packets (259), the aim being to accommodate
the large number of facilities now available, and future addressing schemes.
However, no agreement was reached on the reaction a network should have to a
violation of this maximum.
A proposal (D168) for enhancement of call deflection related facilities was
withheld for study at the next meeting due to it's complexity. It is proposed
to split the call deflection subscription facility into two new facilities;
basic mode and extended mode. The call deflection selection facility is enhanced
similarly. A new facility is created; the recall notification facility.
It was pointed out that there is a technical problem concerning fast select;
call connected or clear indication packets, with user data, transmitted to the
calling DTE when it has not requested fast select.
Also, this would only be available for national calls, and there is a need
to store the calling DTE address for a relatively long period in the originally
called DTE; this point requires further study.
A number of contributions (W28, D170, D174) on abbreviated addresses were
discussed. Contribution D170 based on abbreviated addresses contained in the
called DTE address field coded in BCD was opposed.[PB]
W28 and D174 were based on a new facility. It was agreed that the name "mnemonic
address" should be used, and that it should not be a subscription facility.
Also, any reference to X.500 would be inappropriate. Moreover, the possible
use off the called address extensio facility was questioned. It was pointed
out that a number of capabilities relating to addressing/routeing were possible,
and that a new subscription-time facility indicating specific addressing/routeing
may be appropriate.
No modifications to X.25 were agreed; contributions are expected for the next
meeting. It is clear that there is a great deal of interest being shown in this
area by a number of Administrations.
A contribution (W32) outlining the provision of a multicast service was discussed.
This service is intended to deliver single data units to multiple destinations.
This is a service in the sense of recommendations X.1/X.2; there is no intended
relationship to an OSI service.
It was agreed that, as far as possible, such a service should not require
modifications to X.25, but should be built above X.25. This raises the point
of whether or not Q7/WP2 should define such a new protocol. It would appear
sensible to prevent any changes to X.25, and allocate the work to another question.
There was some consensus that Q8 would be the right question to consider this
proposal, looking at it as a PAD-like service.
A contribution (W31) concerning international call redirection and deflection
was discussed. This details the ability to redirect and deflect a call between
networks; (inter-network call redirection and deflection is a more accurate
title). The drive for this work, and source of this proposal is the US. Such
a facility would be of great use in the US where a company may have a number
of sites connected to a number of different networks. However, there was little
interest from other Administrations.
Studies in Q11/WP2 and Q16/WP2 indicate the possibility of creating four new
facilities to prevent or authorize call redirection/deflection in various cases,
and to amend the RPOA subscription facility. The decision on this is relevant
to Q1/WP2, and so it was decided to wait for their decision.
It is clear that the modifications to X.25 are quite numerous. Also, the need
for Public Network to provide such a facility in the UK is not clear.
4 Triple-X
Substantial work took place concerning the support of telematic services in
the PAD recommendations; specifically expansion of X.3 and X.29. An editor's
group convened resulting in the definition of three new parameters for X.3,
and additional actioning text for X.28. No agreement was reached on these changes,
and a report has been sent to SGVIII for comment. A detailed study will be made
at the next meeting.
It is clear that existing PAD implementations will be rendered incompatible.
It appears that the existing mechanism for implementing "non-standard"
parameters in X.3 has been ignored. This mechanism is backward-compatible with
existing implementations. It seems logical to annex these extensions to new
"X.PAD-bis" type recommendations.
Detailed work was undertaken on the proposed Fax PAD recommendations. The
work was based on the output from the Special Rapporteur's meeting. Specific
technical issues require resolution; DTMF signalling required by the user to
signal their NUI, facilities desired, and /or other FPAD values; editing signals
including command cancel and FPAD reset; and provision of text for the user
interface relative to the frequency/pattern of tonal responses from the FPAD.
The direction of this work is clearly to produce recommendations that will
exist entirely separately, but in parallel with the existing PAD recommendations.
It seems fair to assume from this that the work on the support of telematic
services will be unaffected.
Appendix J - UKa - UKb comparison
----------------------------------------
A COMPARISON OF THE FACILITIES AVAILABLE ON UKa AND UKb SOFTWARE RELEASES
--------------------------------------------------------------------------------
| X.2 LEVEL 2 PER USER SUBSCRIPTION | X.2 | UKa | UKa | UKa | UKb |
| OPTIONS | REF CLASS | V 3.20 | V 3.52 | V 4.00 | V 4.03 |
| Multilink procedures | 1.21 A | No | No | No | No |
| Extended frame sequence numbering | 1.30 A | Yes*1 | Yes*1 | Yes*1 | Yes*2 |
| X.2 LEVEL 3 PER USER SUBSCRIPTION | X.2 | UKa | UKa | UKa | UKb |
| OPTIONS | REF CLASS | V 3.20 | V 3.52 | V 4.00 | V 4.03 |
| Extended packet sequence numbering | 1.1 A | No | No | No | Yes |
| Non-standard default window sizes | 1.2 A | Yes*3 | Yes*3 | Yes*3 | Yes*4 |
| Non-standard default packet sizes | 1.3 A | Yes*5 | Yes*5 | Yes*5 | Yes*5 |
| Default throughput class assignment | 1.4 A | Part*6 | Part*6 | Part*6 | Yes |
| Flow control parameter negotiation | 1.5 E | Yes*3/5 | Yes*3/5 | Yes*3/5 | Yes*4/5 |
| Throughput class negotiation | 1.6 E | Part*6 | Part*6 | Part*6 | Yes |
| Packet Retransmission | 1.7 A | Yes | Yes | Yes | No |
| Incoming calls barred | 1.8 E | Yes | Yes | Yes | Yes*7 |
| Outgoing calls barred | 1.9 E | Yes | Yes | Yes | Yes*7 |
| One-way logical channel outgoing | 1.10 E | Yes | Yes | Yes | Yes |
| One-way logical channel incoming | 1.11 E | Yes | Yes | Yes | Yes |
| Closed user group | 1.12 E | Yes | Yes | Yes | Yes |
| Closed user group with outgoing access | 1.13 A | Part*8 | Part*8 | Part*8 | Yes |
| Closed user group with incoming access | 1.14 A | Part*9 | Part*9 | Part*9 | Yes |
| Incoming calls barred within CUG | 1.15 A | No | No | No | Yes |
| Outgoing calls barred within CUG | 1.16 A | No | No | No | Yes |
| Bilateral closed user group | 1.17 A | No | No | No | No |
| Bilateral CUG with outgoing access | 1.18 A | No | No | No | No |
| Reverse charge acceptance | 1.19 A | Yes | Yes | Yes | Yes |
| Fast select acceptance | 1.20 E | Yes | Yes | Yes | Yes |
| Charging information | 1.22 A | No*10 | No*10 | Yes | No |
| Direct call | 1.23 FS | No | No | No | No |
| Hunt group | 1.24 A | Part*11 | Part*11 | Yes | Part*12 |
| X.2 LEVEL 3 PER USER SUBSCRIPTION | |||||
| OPTIONS REF CLASS V 3.20 V 3.52 V 4.00 V 4.03 | |||||
| On-line facility registration | 1.25 A | No | No | No | No |
| D-bit modification | 1.26 A | Yes*13 | Yes*13 | Yes*13 | No |
| Local charge prevention | 1.27 A | No | Yes*14 | Yes*14 | Yes |
| Call redirection | 1.28 A | Part*15 | Part*15 | Yes | Part*16 |
| Network user identification | 1.29 A | No | No | Yes | Yes |
| RPOA selection | 1.31 A | No | No | Yes | Yes |
| X.2 LEVEL 3 PER CALL FACILITY X.2 | |||||
| OPTIONS REF CLASS V 3.20 V 3.52 V 4.00 V 4.03 | |||||
| Closed user group selection | 2.1 E | Yes | Yes | Yes | Yes |
| Bilateral closed user group selection | 2.2 A | No | No | No | No |
| Reverse charging | 2.3 A | Yes | Yes | Yes | Yes |
| RPOA selection | 2.4 A | No | No | Yes | Yes |
| Flow control parameter negotiation | 2.5 E | Yes*17 | Yes*17 | Yes*18 | Yes |
| Fast select | 2.6 E | Yes | Yes | Yes | Yes |
| Throughput class negotiation | 2.7 E | Part*19 | Part*19 | Part*19 | Yes |
| Abbreviated address calling | 2.8 FS | No | No | No | Part |
| Charging information | 2.9 A | No | No | Yes*20 | No |
| Transit delay selection and indication | 2.10 E | No | No | Part*21 | Part*21 |
| Call redirection notification | 2.11 A | No | No | No | No |
| Called line address modified | |||||
| notification | 2.12 A | No | No | No | Part*22 |
| Network user identification (NUI) | 2.13 A | No | No | Yes | Yes |
| Closed user group with outgoing access | |||||
| selection | 2.14 A | No | No | No | Yes |
| X.75 LEVEL 2 SUBSCRIPTION OPTIONS | UKa | UKa | UKb | |
| V 3.20 | V 3.52 | V 4.00 | V 4.03 | |
| Multilink procedures | No | No | No | No |
| Extended frame sequence numbering | Yes*1 | Yes*1 | Yes*1 | Yes*2 |
| X.75 LEVEL 3 SUBSCRIPTION OPTIONS | UKa | UKa | UKa | UKb |
| V 3.20 | V 3.52 | V 4.00 | V 4.03 | |
| Extended packet sequence numbering | No | No | No | Yes |
| Non-standard default window sizes | Yes*3 | Yes*3 | Yes*3 | Yes*4 |
| Non-standard default packet sizes | Yes*5 | Yes*5 | Yes*5 | Yes*5 |
| Default throughput class assignment | Part | Part | Part | Yes |
| Flow control parameter negotiation | Yes*3/5 | Yes*3/5 | Yes*3/5 | Yes*4/5 |
| Throughput class negotiation | Part*6 | Part*6 | Part*6 | Yes |
| Closed user group | Yes | Yes | Yes | Yes |
| Closed user group with outgoing access | Part*8 | Part*8 | Part*8 | Yes |
| Closed user group with incoming access | Part*9 | Part*9 | Part*9 | Yes |
| Incoming calls barred within CUG | No | No | No | Yes |
| Outgoing calls barred within CUG | No | No | No | Yes |
| Reverse charge acceptance | Yes | Yes | Yes | Yes |
| Fast select acceptance | Yes | Yes | Yes | Yes |
| X.75 LEVEL 3 PER CALL UTILITIES | UKa | UKa | UKa | UKb |
| V 3.20 | V 3.52 | V 4.00 | V 4.03 | |
| Transit network identification | Yes | Yes | Yes | Yes |
| Call identifier | Yes | Yes | Yes | Yes |
| Throughput class indication | Yes*19 | Yes*19 | Yes*19 | Yes |
| Window size indication | Yes | Yes | Yes | Yes |
| Packet size indication | Yes | Yes | Yes | Yes |
| Fast select indication | Yes | Yes | Yes | Yes |
| Closed user group indication | Yes | Yes | Yes | Yes |
| Closed user group with outgoing | ||||
| access indication | Yes | Yes | Yes | Yes |
| Reverse charging indication | Yes | Yes | Yes | Yes |
| X.75 LEVEL 3 PER CALL UTILITIES | UKa | UKa | UKa | UKb |
| V 3.20 | V 3.52 | V 4.00 | V 4.03 | |
| Called line address modified | ||||
| notification | No | No | Yes | Yes |
| Clearing network identification | No | No | Yes | Yes |
| Traffic class indication | No | No | No | Yes |
| Transit delay selection | No | No | Yes*21 | Yes*21 |
| Transit delay indication | No | No | Yes | Yes |
| Utility marker | Yes | Yes | Yes | Yes |
KEY
---
* Indicates that an explanatory note is required, due either to a minor variation from the recommendation or a possible interworking problem.
Part Indicates that an explanatory note is required, due to significant difference between the recommendation and the software implementation.
FS Indicates that the facility is referred to in the recommendation, but is for further study.
A Additional facility
E Essential facility
Software:
UKa V 3.20 CCITT 1980 Code currently on network May 90
UKa V 3.52 CCITT 1980 Code roll out, planned to be completed by Jan 91
UKa V 4.00 CCITT 1984 Code roll out to be decided
UKb V 4.03 CCITT 1984
- Only the extended frame sequence number set mode command (sabme), may be sent by the DTE.
- Only the extended frame sequence number set mode command (sabme), may be sent by the DTE. A non-standard X.75 style extended frame sequence numbering scheme is employed. A description of this is to be obtained from UKb.
- UKb supports standard (modulo 8) and extended (modulo 128) packet sequence numbering, the numbering scheme is dependent on link configuration. Only one sequencing scheme may be used during the subscription period.
- UKa supports standard (modulo 8) packet sequence numbering only.
- The following non standard default packet sizes are supported: UKa; 16, 32, 64, 256, 512, 1024 : UKb ; 16, 32, 64, 256, 512, 1025, 2048, 4096
- The facility is passed transparently through the network, no action is actually taken.
- Requires the setting of a number of configuration parameters to effectively provide facility.
- No preferential CUG allowed, default is open network.
- No preferential CUG allowed, CUG with outgoing access facility not used.
- A non CCITT charging information field is present in all clear indication packet facility fields if this option is subscribed to.
- A UKa facility "Multiline" provides a service similar to Hunt Group, but no CLAMN or Link specific addresses.
- The interface does not generate CLAMN but is capable of receiving the facility from either DTE.
- Packet level acknowledgements always have end to end significance on UKa switches irrespective of the D bit setting.
- Not available on single processor (DX1)
- Redirection may take place but CRN and CLAMN facilities not available on single processor (DX1) . DX1 only available option at release 3.20.
- Redirection may take place but CRN and CLAMN facility (generated by the DCE) not available.
- Packet size requests of 2048 and 4096 will result in the call clearing
- Packet size requests of 2048 and 4096 will be negotiated to 1024 by the called interface
- The facility may be sent, but the network does not act upon it
- Monetary unit and Distance fields not supported, one tariff period field only
- The transit delay value selected will not influence the call routing selected
- The interface will not generate a CLAMN, a DTE generated CLAMN is allowed
and will be passed transparently through the network.
