Calls from SIP Gensys to CS1K fail on connect

[bignose21]

Have a problem where calls to CS1000 7.6 SP4 from a SIP Gensys fail when the call is answered. Odd thing is we have another CS1K at the same level call works fine through that. The Call is going via a Session Manager 6.3.4. One thing I do see in the SIP trace is in the Media types not sure if this is the problem.

<b>Working Call</b>
v=0
o=- 1404233084 1 IN IP4 1.2.3.4
s=Bria 3 release 3.5.3 stamp 70599
c=IN IP4 1.2.3.4
t=0 0
m=audio 58794 RTP/AVP 8 101
a=sendrecv
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15


<b>Failing Call</b>
v=0
o=- 12626 1 IN IP4 1.2.3.4
s=-
c=IN IP4 1.2.3.4
t=0 0
m=audio 5510 RTP/AVP 8 101 111
c=IN IP4 1.2.3.4
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=rtpmap:111 X-nt-inforeq/8000
a=ptime:20
a=sendrecv


The Failing call goes like this

Genesys ---invite---> SM
Genesys <--Trying---- SM
SM ---invite---> CS1K
SM <--Trying---- CS1K
SM <--Ringing--- CS1K
Genesys <--Ringing--- SM
Genesys ---PRACK----> SM
SM ----PRACK---> CS1K
SM <--200 OK---- CS1K (For PRACK)
Genesys <--200 OK---- SM
SM <--200 OK---- CS1K (For Invite)
Genesys <--200 OK---- SM
Genesys ---ACK------> SM
Genesys ---BYE------> SM
SM ---ACK------> CS1K
SM ---BYE------> CS1K
SM <--200 OK---- CS1K (For BYE)
Genesys <--200 OK---- SM


<b>The Bye Message says:</b>

Reason: SIP;cause=488;text="Not Acceptable Here"

 

[bignose21]

Be a good point to mention that the CS1K is just passing the call to PSTN over E1 EURO ISDN in both cases.

 

[phones1]

if its passing it over euro isdn what does the DCH messaging show?

Remember if it doesn't work hit it harder

Scott UK

 

[bignose21]

DCH matches up with the SIP and looks fine the disconnect comes from the Genesys as soon as the call is answered by the subscriber on the PSTN.