11-05-2010 01:38 PM - edited 03-16-2019 01:45 AM
Hi,
I know what you're thinking....it's one of the T3xx timers, and it is. The problem is, how to stop the timer expiring and dropping calls....hmmmm
This is the deal: We've got an ISDN30 line into an H.323 GW which talks back to CUCM 7.
Incoming calls work fine, outgoing calls to mobiles/cells, work fine, but with calls to landlines, the call always drops after 180 seconds.
Cisco TAC are working on this at the moment, and have been all week, but to no avail.
Config of interest...
interface FastEthernet0/0
ip address 10.10.100.13 255.255.255.0
speed 100
full-duplex
h323-gateway voip interface
!
interface Serial0/0:15
no ip address
encapsulation hdlc
no logging event link-status
isdn switch-type primary-net5
isdn incoming-voice voice
isdn sending-complete
no cdp enable
11-05-2010 02:09 PM
From your description, it seems for the outgoing landline calls, the
GW is not receiving q931 CONNECT so T301 pops.
Did u try isdn timer T301 xx CLI under serial/d-chan interface?
If u run debug isdn q931, it will confirm whether we are rec. CONNECT
back or it stays in Alerting/Progress.
There is one other possibility which is that CONNECT from PRI leg is
not being propagated to the voip/h323 leg.
But start with q931 debug.
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