SIP Gateway to Gateway consultative call transfer help

Unanswered Question

We have 2821's each with 2 PRIs. They run SIP and IOS 124-9.T6. Consultative call transfer where each call leg traverses a different gateway do not work. The transferring phone is a 7960 running SIP 7.3(8.8 didn't work either). Cisco cannot provide a conclusive answer but suggests this will not work. Any thoughts? Can it be made to work using SIP & H.323? We are not using call manager.


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vmoopeung Fri, 05/02/2008 - 11:55
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You need to use a IP to IP gateway or try out with the command allow-connections sip to h323 and the reverse under

voice service voip.

I tried booting IOS c2800nm-adventerprisek9_ivs-mz_gw.124-15.T4.bin which supposedly contains the IP2IP gateway feature set. It will not load. The router reverts back to c2800nm-ipvoicek9-mz.124-15.T4.bin which is IP voice feature set. After booting I added the suggested allow commands. These did not fix the problem. Is anyone else out there doing this type of transfer with SIP between gateways?



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