Note: My skills with FS are mediocre at best, and my SIP knowledge is very green, so please bear with me. We have been experiencing an inconsistent problem with our FS conference server. On occassion, a person on the call will go silent. They remain connected to the call, but they have no voice (their channel does not appear muted in the CLI). They can hear everyone else on the call. If they hangup and reconnect to the call everything is okay. After performing some digging on a recent occurance of this behavior, it appeared to coincide with re-invites being sent from our platform back through the SIP Tandem.
From my understanding, the re-invite is initiated because of the session_expire parameter having been set to 15 minutes (1800 seconds).
Our current assumption is that the 1800 seconds is expiring, and we are attempting to initiate the re-invite to the carrier, and the routing is not executing properly, perhaps? Has anyone experienced this problem? Is there a way to override the request to set the session_expire, or something? VMK
a quick way to have the caller's UA send the reinvite might be to have them place the call on hold and then resume the call. If this works, it's pretty apparent you do indeed have a reinvite issue though. The carrier might be expecting an empty packet for the rtp keepalive. It might be good to ask the carrier what they would prefer in the following: keepalive interval, method for sip keepalive, method for rtp keepalive and compare that with your settings (as well as a trace).
Our current assumption is that the 1800 seconds is expiring, and we are attempting to initiate the re-invite to the carrier, and the routing is not executing properly, perhaps?
Has anyone experienced this problem? Is there a way to override the request to set the session_expire, or something?
VMK
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-- ====================== Tony Graziano, Manager Telephone: 434.984.8430 sip: tgraziano@voice.myitdepartment.net Fax: 434.984.8431 Email: tgraziano@myitdepartment.net LAN/Telephony/Security and Control Systems Helpdesk: Telephone: 434.984.8426 sip: helpdesk@voice.myitdepartment.net Fax: 434.984.8427 Helpdesk Contract Customers: http://www.myitdepartment.net/gethelp/ Why do mathematicians always confuse Halloween and Christmas? Because 31 Oct = 25 Dec.
participants (3)
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Brian West
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Tony Graziano
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VM Knott