Hi Anton, the state of CICs can become unsynchronised between SS7 nodes although it doesn't happen too often. Sometimes Node A thinks that a particular CIC is "In Service Free" whilst Node B thinks that Node A didn't handle the last call correctly and places the same CIC into a blocked state at a higher application layer. When this situation occurs we normally use MML to "flex" the CICs by manually taking each suspect CIC out of service and then returning it back to service. I have seen that chan_ss7 appears to support these maintenance messages but I haven't used them myself. When an SS7 node is started for the first time (cold start) it has no knowledge of the state of the CICs as maintained by another SS7 node that it is connected to. To synchronise the state of the CICs after a cold start it is common to see many block and unblock messages (including Circuit Group Resets) after the signalling links are aligned but before the route starts to handle live traffic. Regards Darren On 12/05/06, Anton <anton.vazir@xxxxxxxxx> wrote: > > Guys, > > Does anyone know, if it is possible for timeslots to hang, with SS7 > signalling? > For example if REL message is missing (did not received in time by > Asterisk) - > would the accured timeslot hang (be active on Asterisk side, but > released in the TELCO side?) I've strange issues with one of my telco's. > The sessions just timed out, and released by the Asterisk itself, since > there > is 3600s duration limit. > > Any help is highly appreciated! > > ,"SS7/15","IAX2/axsoftsw1-16389","Hangup","","2006-04-21 > 23:04:54","2006-04-21 23:05:00","2006-04-22 > 00:04:59",3605,3599,"ANSWERED","DOCUMENTATION" > ,"SS7/19","IAX2/axsoftsw1-16392","Hangup","","2006-04-21 > 23:05:23","2006-04-21 23:05:29","2006-04-22 > 00:05:28",3605,3599,"ANSWERED","DOCUMENTATION" > ,"SS7/11","IAX2/axsoftsw1-16393","Hangup","","2006-04-21 > 23:46:00","2006-04-21 23:46:07","2006-04-22 > 00:46:07",3607,3600,"ANSWERED","DOCUMENTATION" > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > asterisk-ss7 mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-ss7 > -- Darren Storer Comgate Telco|Internet|Broadcast -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-ss7/attachments/20060512/c24b8a33/attachment.htm
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