TABLE A-4/X.225 Operations on variable Operations on variables Events Condition for valid Condition for SPDU or primitive update of V(A) V(M) V(R) Vsc variables SSYNMreq if Vsc true set to V(M) + 1 unchange false SSYNmreq V(M) d SACTEreq if Vsc false unchange V(M) + 1 unchange false d d if Vsc true unchange V(M) + 1 unchange unchange MAP SPDU d d d AE SPDU sn = V(M) if Vsc false set to V(M) + 1 unchange unchange V(M) d d if Vsc true unchange V(M) + 1 unchange true d d MIP SPDU sn = V(M) if Vsc false set to V(M) + 1 unchange true V(M) d SSYNMrsp SACTErsp sn = V(M) - 1 set to unchange set to unchange MAA SPDU V(M) d V(M) d AEA SPDU SSYNmrsp Vsc = true and V(M) set to unchange unchange unchange > sn >= V(A) * ns + 1 d d d MIA SPDU Vsc = false and V(M) set to unchange unchange unchange > sn >= V(A) * sn + 1 d d d SRSYNreq a: not applicable abandon unchange unchange unchange unchange r: V(M) >= sn >= restart d d d d V(R) set unchange unchange unchange unchange s: sn <= 999 999 d d d d unchange unchange unchange unchange d d d d RS SPDU a: sn <= 999 999 abandon unchange max (sn, unchange unchange r: sn >= V(R) restart d V(M)) d d s: sn <= 999 999 set unchange unchange unchange unchange d d d d unchange unchange unchange unchange d d d d SRSYNrsp a: sn = V(M) abandon set to set to 0 unchange r: sn as in RS SPDU restart sn sn unchange d s: sn <= 999 999 set set to set to d unchange sn sn 0 d set to set to unchange sn sn d RA SPDU a: sn >= V(M) abandon set to set to 0 unchange r: sn as in RS SPDU restart sn sn unchange d s: sn <= 999 999 set set to set to d unchange sn sn 0 d set to set to unchange sn sn d TABLE A-4/X.225 (cont.) Operations on variable Operations on variables Events Condition for valid Condition for SPDU or primitive update of V(A) V(M) V(R) Vsc variables SACTRreq set to set to set to 1 unchange AR SPDU sn + 1 sn + 1 d SACTSreq set to 1 set to 1 set to 1 unchange AS SPDU d SCONrsp sn present set to set to 0 false AC SPDU sn sn sn: synchronization point serial number quoted in SS-user request or SPDU >=: greater than or equal to <=: less than or equal to *: synchronization point serial number not equal to V(M) - 1 if major synchronization or activity end outstandingTABLE A-5/X.225 TABLE A-7/X.225 Connection establishment state table STATE STA01 STA01A STA01B STA01C STA01D STA02A STA02B STA08 STA15D STA16 EVENT idle no await AA await idle TC await await await OA await await await TC TCONcnf con CDO AC SCONrsp after TDISind PR-AB AC / / STA01A / / TDISreq SCONcnf STA15D STA16 STA01 + [5] [11] STA713 [6] CDO / / / / TDISreq ”p202 STA15D STA01 [50] STA01D p202 SCONind STA08 CN / / TDISreq / / ”p01 & TDISreq [3] ”p76 & [3] STA01 p204 OA STA01 [50] STA01D ”p01 & ”p76 & ”p204 SCONind STA08 ”p01 & p76 & ”p02 RF- nr [4] STA16 ”p01 & p76 & p02 RF- r STA01C p01 TDISreq STA01 OA / / / / TDISreq CDO [51] STA15D STA01 STA02A RF-nr / / STA01A / / TDISreq SCONcnf-SCONcnf- STA16 STA01 TDISreq TDISreq STA01 STA01 TABLE A-7/X.225 (cont.) STATE STA01 STA01A STA01B STA01C STA01D STA02A STA02B STA08 STA15D STA16 EVENT idle no await AA await idle TC await await await OA await await await TC TCONcnf con CDO AC SCONrsp after TDISind PR-AB STA16 RF-r / / STA01A / / TDISreq ”p02 ”p02 STA01 SCONcnf-SCONcnf- TDISreq TDISreq STA01 STA01 p02 p02 SCONcnf-SCONcnf- STA01C STA01C SCONreq TCONreq p01 & [2] p204 CN STA01B STA02B p01 & ”p204 CN STA02A SCONrsp AC [5] STA15D + [11] STA713 SCONrsp- ”p02 RF- STA15D nr [4] STA16 p02 RF- r STA01C TCONcnf / / / / p204 CN / / / / / / / / / / / / / / STA02B ”p204 CN STA02A TCONind TCONrsp / / / / / / / / / / / / / / / / / / [1] STA01C