[cisco-voip] T321 timer on BRI channel

[James Jung]

Hi all

I have a problem and it has happened 7 times already this year.

A remote office use 2 BRI circuits controlled by CCM (4.1.3) using MGCP.

No one can make inbound and outbound call when it happens, and the isdn
status shows "Multiple-Frame.... Established" but when I make a test
call from PSTN, the q931 shows 

 

*Nov 21 10:10:54: ISDN BR0/0/0 Q931: RX <- SETUP pd = 8  callref = 0x1A 

        Sending Complete 

        Bearer Capability i = 0x8090A3 

                Standard = CCITT 

                Transfer Capability = Speech  

                Transfer Mode = Circuit 

                Transfer Rate = 64 kbit/s 

        Channel ID i = 0x89 

        Signal i = 0x40 - Alerting on - pattern 0  

        Called Party Number i = 0x80, '2551694' 

                Plan:Unknown, Type:Unknown 

        High Layer Compat i = 0x9181

*Nov 21 10:10:54: ISDN BR0/0/0 Q931: TX -> RELEASE_COMP pd = 8  callref
= 0x9A 

        Cause i = 0x80AC - Requested circuit/channel not available  

 

 

And after bouncing the bri interface or no mgcp and mgcp command, it
works fine.

Anyone can tell me what would be the cause and how to avoid this
problem?

 

Thank you very much for your help in advance.

JJ.





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