1、Union internationale des tlcommunications Place des Nations 1211 GENVE 20 Suisse Switzerland Suiza COVERING NOTE GENERAL SECRETARIAT INTERNATIONAL TELECOMMUNICATION UNION Geneva, 12 March 2004 ITU TELECOMMUNICATION STANDARDIZATION SECTOR Subject: Erratum 1 (03/2004) to ITU-T Recommendation Q.2140 (1
2、995), B-ISDN ATM adaptation layer Service specific coordination function for signalling at the network node interface (SSCF at NNI) In the process of publishing ITU-T Rec. Q.2140 (02/95), the states 2/4/2, 3/10/5, 2/10/3, 2/10/4 in the second half of Table 6/Q.2140 have been overwrote by states 1/1/
3、1, 1/4/1, 2/1/2, 2/2/2 of the first half of Table 6/Q.2140. This Erratum provides the corrections to the heading of Table 6/Q.2140 required to reflect the agreed state transition table. Table 6/Q.2140 State transition table for SSCF at the NNI (first half) State Out Of Service/Idle 1/1/1 Out Of Serv
4、ice/ Outgoing DisconnectionPending 1/4/1 Alignment/Idle 2/1/2 Alignment/ Outgoing Connection Pending 2/2/2 SSCF Timers running T1, T2 T2 Event AAL-START-request AA-ESTABLISH- request SSCOP-UU := NM or EM, BR := No (Note 2) MAAL-REPORT- indication -,ALN,- Set T2 2/2/2 AA-ESTABLISH- request SSCOP-UU :
5、= NM or EM, BR := No (Note 2) MAAL-REPORT- indication -,ALN,- Set T2 2/2/2 Illegal Illegal AAL-STOP-request Illegal Illegal Reset T1, T2 Set UPS = NM MAAL-REPORT- indication -,OOS,- 1/1/1 AA-RELEASE-requestSSCOP-UU := OOS Reset T2 Set UPS = NM MAAL-REPORT- indication -,OOS,- 1/4/1 2 Table 6/Q.2140 S
6、tate transition table for SSCF at the NNI (first half) State Out Of Service/Idle 1/1/1 Out Of Service/ Outgoing DisconnectionPending 1/4/1 Alignment/Idle 2/1/2 Alignment/ Outgoing Connection Pending 2/2/2 SSCF Timers running T1, T2 T2 Event AAL-EMERGENCY- request Set UPS = EM 1/1/1 Set UPS = EM 1/4/
7、1 Set UPS = EM 2/1/2 Set UPS = EM 2/2/2 AAL-EMERGENCY_ CEASES-request Set UPS = NM 1/1/1 Set UPS = NM 1/4/1 Set UPS = NM 2/1/2 Set UPS = NM 2/2/2 AAL-MESSAGE_FOR TRANSMISSION- request Illegal Illegal Illegal Illegal AAL-RETRIEVE_ BSNT-request IF BSNT available then AAL-BSNT-confirm Parameter Data :=
8、 BSNT (Note 4) else AAL-BSNT_NOT_ RETRIEVABLE- confirm 1/1/1 IF BSNT available then AAL-BSNT-confirm Parameter Data := BSNT (Note 4) else AAL-BSNT_NOT_ RETRIEVABLE- confirm 1/4/1 Illegal Illegal AAL-RETRIEVAL_ REQUEST_AND_ FSNC-request AA-RETRIEVE- request RN := Parameter Data 1/1/1 AA-RETRIEVE- req
9、uest RN := Parameter Data 1/4/1 Illegal Illegal AAL-FLUSH_ BUFFERS-request 1/1/1 1/4/1 Illegal Illegal AAL-CONTINUE- request 1/1/1 1/4/1 Illegal Illegal AA-ESTABLISH- indication with SSCOP-UU = EM, NM IF (LPO = 0) then AA-RELEASE-request SSCOP-UU := OOS else AA-RELEASE- request SSCOP-UU := PO 1/1/1
10、Illegal AA-ESTABLISH-response SSCOP-UU := NM or EM, BR := No (Note 2) MAAL-PROVING-indication Reset T1 (Note 1) Generate N1 Set C1 = N1 Set T3, Reset INS flag 2/10/3 Illegal AA-ESTABLISH-indication with SSCOP-UU = others IF (LPO = 0) then AA-RELEASE-request SSCOP-UU := OOS else AA-RELEASE-request SS
11、COP-UU := PO 1/1/1 Illegal AA-RELEASE- request SSCOP-UU := PE MAAL-REPORT-indication LR,-,PE 2/1/2 Illegal 3 Table 6/Q.2140 State transition table for SSCF at the NNI (first half) State Out Of Service/Idle 1/1/1 Out Of Service/ Outgoing DisconnectionPending 1/4/1 Alignment/Idle 2/1/2 Alignment/ Outg
12、oing Connection Pending 2/2/2 SSCF Timers running T1, T2 T2 Event AA-ESTABLISH-confirm with SSCOP-UU = EM, NM Illegal Illegal Illegal MAAL-PROVING-indication Generate N1 Set C1 = N1 Set T3 (Note 1) Reset INS flag 2/10/3 AA-ESTABLISH- confirm with SSCOP-UU = others Illegal Illegal Illegal AA-RELEASE-
13、requestSSCOP-UU := PE MAAL-REPORT- indication LR,-,PE 2/4/2 AA-RELEASE-indication with Source = User Illegal Illegal Illegal MAAL-REPORT-indication RR,-,SSCOP-UU Set T1 2/1/2 AA-RELEASE- indication with Source = SSCOP Illegal Illegal Illegal MAAL-REPORT- indication SR,-,- Set T1 2/1/2 AA-RELEASE- co
14、nfirm Illegal 1/1/1 Illegal Illegal AA-DATA-indication with MU 4 octets Illegal Illegal Illegal Illegal AA-DATA-indication with MU = 4 octets and PDU type = INS Illegal Illegal Illegal Illegal AA-DATA-indication with MU = 4 octets and PDU type = NM Illegal Illegal Illegal Illegal AA-DATA-indication
15、with MU 4 octets then AAL-RETRIEVED_ MESSAGES- indication Parameter Data := MU else Discard MU 1/1/1 IF MU 4 octets then AAL-RETRIEVED_ MESSAGES- indication Parameter Data := MU else Discard MU 1/4/1 Illegal Illegal AA-RETRIEVE_ COMPLETE-indication AAL-RETRIEVAL_ COMPLETE-indication 1/1/1 AAL-RETRIE
16、VAL_ COMPLETE-indication 1/4/1 Illegal Illegal MAAL-PROVING_ UNSUCCESSFUL-response Illegal Illegal Illegal Illegal MAAL-RELEASE-request 1/1/1 1/4/1 AAL-OUT_OF_ SERVICE- indication Reset T1, T2 Set UPS = NM 1/1/1 AA-RELEASE-requestSSCOP-UU := MI AAL- OUT_OF_SERVICE-indication Reset T2 Set UPS = NM 1/
17、4/1 MAAL-LOCAL_ PROCESSOR_ OUTAGE-request Set LPO = 1 1/1/1 Set LPO = 1 1/4/1 Set LPO = 1 2/1/2 Set LPO = 1 2/2/2 MAAL-LOCAL_ PROCESSOR_ RECOVERED-request Set LPO = 0 1/1/1 Set LPO = 0 1/4/1 Set LPO = 0 2/1/2 Set LPO = 0 2/2/2 MAAL-FORCE_ PROVING-request Set MPS = NM 1/1/1 Set MPS = NM 1/4/1 Set MPS
18、 = NM 2/1/2 Set MPS = NM 2/2/2 MAAL-FORCE_ EMERGENCY-request Set MPS = EM 1/1/1 Set MPS = EM 1/4/1 Set MPS = EM 2/1/2 Set MPS = EM 2/2/2 MAAL-CLEAR_FORCE_ MODES-request Set MPS = N 1/1/1 Set MPS = N 1/4/1 Set MPS = N 2/1/2 Set MPS = N 2/2/2 Local Congestion (Note 5) Implementation dependent (Note 6)
19、 1/1/1 Implementation dependent (Note 6) 1/4/1 Implementation dependent (Note 6) 2/1/2 Implementation dependent (Note 6) 2/2/2 Local Congestion Ceased (Note 5) Implementation dependent (Note 6) 1/1/1 Implementation dependent (Note 6) 1/4/1 Implementation dependent (Note 6) 2/1/2 Implementation depen
20、dent (Note 6) 2/2/2 5 Table 6/Q.2140 State transition table for SSCF at the NNI (first half) State Out Of Service/Idle 1/1/1 Out Of Service/ Outgoing DisconnectionPending 1/4/1 Alignment/Idle 2/1/2 Alignment/ Outgoing Connection Pending 2/2/2 SSCF Timers running T1, T2 T2 Event T1 expires Illegal Il
21、legal AA-ESTABLISH- request SSCOP-UU := NM or EM, BR := No (Note 2) 2/2/2 Illegal T2 expires Illegal Illegal AAL-OUT_OF_ SERVICE-indication MAAL-REPORT-indication LR,OOS,ANS Reset T1 Set UPS = NM 1/1/1 AA-RELEASE-request SSCOP-UU := ANS AAL-OUT_OF_ SERVICE-indication MAAL-REPORT-indication LR,OOS,AN
22、S Set UPS = NM 1/4/1 T3 expires and C1 0 Illegal Illegal Illegal Illegal T3 expires and C1 = 0 Illegal Illegal Illegal Illegal Table 6/Q.2140 State transition table for SSCF at the NNI (second half) State Alignment/Outgoing Disconnection Pending 2/4/2Out Of Service/Idle 1/1/1 In Service/Data Transfe
23、r Ready 3/10/5Out Of Service/ Outgoing DisconnectionPending 1/4/1 Proving/Data Transfer Ready 2/10/3Alignment/Idle 2/1/2 Aligned Ready/Data Transfer Ready 2/10/4 Alignment/ Outgoing Connection Pending 2/2/2 SSCF Timers running T2 T1, T2, T3 T2 Event AAL-START-request Illegal Illegal Illegal Illegal
24、AAL-STOP-request MAAL-REPORT-indication -,OOS,- Reset T2 Set UPS = NM 1/4/1 AA-RELEASE-request SSCOP-UU := OOS MAAL-REPORT-indication LR,OOS,- Set UPS = NM 1/4/1 AA-RELEASE- request SSCOP-UU := OOS MAAL-REPORT-indication LR,OOS,- MAAL-STOP_ PROVING-indication Reset T2,T3 Set UPS = NM 1/4/1 AA-RELEAS
25、E-request SSCOP-UU := OOS MAAL-REPORT-indication LR,OOS,- Reset T2 Set UPS = NM 1/4/1 AAL-EMERGENCY-request Set UPS = EM 2/4/2 Illegal Set UPS = EM 2/10/3 Set UPS = EM 2/10/4 6 Table 6/Q.2140 State transition table for SSCF at the NNI (second half) State Alignment/Outgoing Disconnection Pending 2/4/
26、2Out Of Service/Idle 1/1/1 In Service/Data Transfer Ready 3/10/5Out Of Service/ Outgoing DisconnectionPending 1/4/1 Proving/Data Transfer Ready 2/10/3Alignment/Idle 2/1/2 Aligned Ready/Data Transfer Ready 2/10/4 Alignment/ Outgoing Connection Pending 2/2/2 SSCF Timers running T2 T1, T2, T3 T2 Event
27、AAL-EMERGENCY_ CEASES-request Set UPS = NM 2/4/2 Illegal Set UPS = NM 2/10/3 Set UPS = NM 2/10/4 AAL-MESSAGE_ FOR_ TRANSMISSION-request Illegal AA-DATA-request MU := Parameter DataMAAL-REPORT-indication -,-,PDUT 3/10/5 Illegal Illegal AAL-RETRIEVE_ BSNT-request Illegal Illegal Illegal Illegal AAL-RE
28、TRIEVAL_ REQUEST_AND_ FSNC-request Illegal Illegal Illegal Illegal AAL-FLUSH_ BUFFERS-request Illegal Illegal Illegal Illegal AAL-CONTINUE-request Illegal Illegal Illegal Illegal AA-ESTABLISH-indication with SSCOP-UU = EM, NM Illegal Illegal Illegal Illegal AA-ESTABLISH-indication with SSCOP-UU = ot
29、hers Illegal Illegal Illegal Illegal AA-ESTABLISH-confirm with SSCOP-UU = EM, NM Illegal Illegal Illegal Illegal AA-ESTABLISH-confirm with SSCOP-UU = others Illegal Illegal Illegal Illegal AA-RELEASE-indication with Source = User Illegal AAL-OUT_OF_ SERVICE-indication MAAL-REPORT-indication RR,-,SSC
30、OP-UU Set UPS = NM 1/1/1 MAAL-REPORT-indication RR,-,SSCOP-UU MAAL-STOP_ PROVING-indication Set T1 Reset T3 2/1/2 MAAL-REPORT-indication RR,-,SSCOP-UU Set T1 2/1/2 7 Table 6/Q.2140 State transition table for SSCF at the NNI (second half) State Alignment/Outgoing Disconnection Pending 2/4/2Out Of Ser
31、vice/Idle 1/1/1 In Service/Data Transfer Ready 3/10/5Out Of Service/ Outgoing DisconnectionPending 1/4/1 Proving/Data Transfer Ready 2/10/3Alignment/Idle 2/1/2 Aligned Ready/Data Transfer Ready 2/10/4 Alignment/ Outgoing Connection Pending 2/2/2 SSCF Timers running T2 T1, T2, T3 T2 Event AA-RELEASE-
32、 indication with Source = SSCOP Illegal AAL-OUT_OF_SERVICE-indication MAAL-REPORT-indication SR,OOS,- Set UPS = NM 1/1/1 MAAL-REPORT-indication SR,-,- MAAL-STOP_ PROVING-indication Set T1 Reset T3 2/1/2 MAAL-REPORT-indication SR,-,- Set T1 2/1/2 AA-RELEASE- confirm Set T1 2/1/2 Illegal Illegal Illeg
33、al AA-DATA-indication with MU 4 octets Illegal AAL-RECEIVED_ MESSAGE-indication Parameter Data := MU3/10/5 MAAL-REPORT-indication LR,-,PE AA-RELEASE-request SSCOP-UU := PE MAAL-STOP_ PROVING-indication Reset T3 2/4/2 AA-RELEASE-requestSSCOP-UU := PE MAAL-REPORT-indication LR,-,PE 2/4/2 AA-DATA-indic
34、ation with MU = 4 octets and PDU type = INS Illegal AA-RELEASE-request SSCOP-UU := PE AAL-OUT_OF_ SERVICE-indication MAAL-REPORT-indication LR,OOS,PESet UPS = NM 1/4/1 Set INS flag 2/10/3 AAL-IN_SERVICE-indication MAAL-REPORT-indication -,INS,- Reset T2 3/10/5 AA-DATA-indication with MU = 4 octets a
35、nd PDU type = NM Illegal AA-RELEASE-request SSCOP-UU := PE AAL-OUT_OF_ SERVICE-indication MAAL-REPORT-indication LR,OOS,PESet UPS = NM 1/4/1 2/10/3 2/10/4 AA-DATA-indication with MU 0 Illegal Illegal AA-DATA-request MU := NM Decrement C1 Set T3 2/10/3 Illegal 10 Table 6/Q.2140 State transition table
36、 for SSCF at the NNI (second half) State Alignment/Outgoing Disconnection Pending 2/4/2Out Of Service/Idle 1/1/1 In Service/Data Transfer Ready 3/10/5Out Of Service/ Outgoing DisconnectionPending 1/4/1 Proving/Data Transfer Ready 2/10/3Alignment/Idle 2/1/2 Aligned Ready/Data Transfer Ready 2/10/4 Alignment/ Outgoing Connection Pending 2/2/2 SSCF Timers running T2 T1, T2, T3 T2 Event T3 expires and C1 = 0 Illegal Illegal If (LPO = 0 however, the mechanism to conform to this requirement is implementation dependent.
