09-08-2010 03:13 AM - modifié 03-16-2019 12:40 AM
Hi all,
I am having a weired issue and need help.
Call flow:
Dial 0967401 >>> Hit SIP Gateway (10.27.0.102) >>> Number translates to 7401 >> Reach CUCM >> Route Pattern 7401 with Route List for another 2800 Gateway (10.27.1.102).
Call is coming in fine and hitting the Call manager but I cannot see any activity at the 2nd gateway. I turned on deb voip ccapi inout but the 2nd gateway showed no activity whatsoever. This number is a fax number and the fax machine is attached to a FXS port at 2nd gateway (10.27.1.102). There is no way I can make fax work if the call does not hit the 2nd gateway.
I have verified that the call is definitely hitting the CUCM as I forwarded the number to my mobile and it rang when I dialled the main DDI.
Both gateways can ping Call manager and Call manager can ping both gateways.
I have reset the gateways and Route List as well.
Any clue why it is not working?
le 09-08-2010 04:23 AM
Is the route pattern in the Calling Search Space of the incoming SIP trunk on UCM?
What error code is UCM returning to the originating router? You can see this using a 'debug ccsip messages' and will see a 400, 500, or 600 fatal response from UCM.
le 09-08-2010 04:38 AM
Hi Jon,
The call ends with a dial tone...long one...and these are the messages.
1398425: Sep 8 11:32:36.802: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 503 Service Unavailable
Via: SIP/2.0/UDP 83.x.x.81:5060;branch=z9hG4bK3defb2f5743e8c15bc8edf36dd4bf603
From: <885558>;tag=3492934351-718907
To: <0967401>;tag=F136BCEC-1C90
Date: Wed, 08 Sep 2010 11:32:34 GMT
Call-ID: 7937962-3492934351-718900@MSX12.gammatelecom.com
CSeq: 1 INVITE
Allow-Events: telephone-event
Server: Cisco-SIPGateway/IOS-12.x
Reason: Q.850;cause=41
Content-Length: 00967401>885558>
Attached you will find the complete ccsip trace.
le 09-08-2010 04:41 AM
Sorry forgot to tell you.
RP is 7401 in Partition PT_FIX_Internal.
The SIP gateway has Inbound CSS as CSS_FIX_RSTD which contains partitions PT_FIX_Internal and PT_FIX_RSTD.
HTH.
le 09-08-2010 05:21 AM
Just to add something more..
I asked someone Internally to dial 7401 and first he got engaged tone and then complete silence...
le 09-08-2010 07:46 AM
We need to find out why the GW is throwing a 503.
What is the topology of this? Is this a SIP-to-SIP CUBE? Or is there an H323 leg? Or is it CUCM-SIP-GW-FXS? It's not clear.
Can you send:
sh run
sh ver
And then get:
debug ccsip all
debug voip ccapi inout
debug h225 asn1 (if you are running h323)
debug vpm sig (if there is an analog line)
debug isdn q931 (if there is a pri)
Collect debugs in the following manner:
Router(config)# service sequence
Router(config)# service timestamps debug datetime msec
Router(config)# logging buffered 10000000 7
Router(config)# no logging con
Router(config)# no logging mon
Router(config)# voice iec syslog
Router# term len 0
Router# sh logg
le 09-08-2010 03:53 PM
Thanks Guys for all your help.
I have resolved the issue myself.
For some reason the Fax Gateway was not accessible from the SIP gateway. The Ping was successful but I was not able to telnet. Something in between was blocking the communication. I bypassed Call manager and created a VOIP dialpeer with session protocol sipv2 and pointed it to another IP address of that fax gateway which was accessible. As the other interface was binded to H323, I had to make this dialpeer as SIPv2 and the issue was resolved.
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