j'ai fais des tests et le résultat est le suivant :

...
== Using SIP VRTP CoS mark 6
-- Executing [0688XXXXXX@from-internal:1] Dial("SIP/2100-00000001", "DAHDI/g1/0688XXXXXX") in new stack
== Everyone is busy/congested at this time (1:0/0/1)
-- Executing [0688XXXXXX@from-internal:2] Hangup("SIP/2100-00000001", "") in new stack
== Spawn extension (from-internal, 0688XXXXXX, 2) exited non-zero on 'SIP/2100-00000001'
-- Executing [h@from-internal:1] Macro("SIP/2100-00000001", "hangupcall") in new stack
-- Executing [s@macro-hangupcall:1] GotoIf("SIP/2100-00000001", "1?skiprg") in new stack
-- Goto (macro-hangupcall,s,4)
-- Executing [s@macro-hangupcall:4] GotoIf("SIP/2100-00000001", "1?skipblkvm") in new stack
-- Goto (macro-hangupcall,s,7)
-- Executing [s@macro-hangupcall:7] GotoIf("SIP/2100-00000001", "1?theend") in new stack
-- Goto (macro-hangupcall,s,9)
-- Executing [s@macro-hangupcall:9] Hangup("SIP/2100-00000001", "") in new stack
== Spawn extension (macro-hangupcall, s, 9) exited non-zero on 'SIP/2100-00000001' in macro 'hangupcall'
== Spawn extension (from-internal, h, 1) exited non-zero on 'SIP/2100-00000001'
== Using SIP RTP TOS bits 184
== Using SIP RTP CoS mark 5
== Using SIP VRTP TOS bits 136
....

et juste avant j'ai fais un : pri show spans

localhost*CLI> localhost*CLI> pri show spans
localhost*CLI> PRI span 1/0: Provisioned, In Alarm, Down, Active
localhost*CLI> PRI span 2/0: Provisioned, In Alarm, Down, Active
localhost*CLI> PRI span 3/0: Provisioned, In Alarm, Down, Active
localhost*CLI> PRI span 4/0: Provisioned, In Alarm, Down, Active

tissou