SIP trunk CUCM 8.5 - Nortel cs1000 incoming call fail?

[Carlos Olortiga]

Hi guys,

I have this problem: I have a SIP trunk with a Nortel CS1000, comunicating by wan, when I call from CUCM to Nortel, everithing is fine. But From Nortel to Cisco, I dont have signaling or voice. Checking a capture, I see this format sending by Nortel

It shows many SIP invite received by my CUCM but do not answer. And checking by packet it has the format phone-context=udp@domain

I think it is not an standard SIP format, some forums said that it is not supported by CUCM. But it is? so CUCM cant be integrated with cs1000?

I check sdi logs and I cant found any error, so I not really sure if it is the cause for call failed.

Somebody can help me

Thanks in advance

[acampbell]

Carlos,

When you read the Cisco interoperability
portal pdf for CUCM8.5 SIP to CS1K on page
58 you can see that a normalisation script
should be ran to negate the use of "phone-context"
from invites etc.

May be this can help

http://www.cisco.com/en/US/solutions/collateral/ns340/ns414/ns728/ns784/989942.pdf

Regards,
Alex.
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