After weeks of research +troubleshooting and very valuable help from my great friend Deepak Bhatnagar (Amsterderm wale :) ) i was able to make a nortel 1140 SIP phone work out of Cisco Callmanger 5.1.3.
here are some key things to know if you plan to do this setup
Nortel Phone run a properity SIP protocol called UNISTIM and so by default when you hook them with any SIP server including callmanger they wont register.
you need to first upgrade them to standard SIP firmware and then register on callmanager
another key thing to know specially when registering any third party SIp phones on CCM is userid should be kept same as DN eg user=1000,DN=1000. Rest all other settings on callmanger SIP phone security profile and SIP profile remains standard except few tweakings.
I hope this blog will help those who are trying to achieve this integration and if you have any questions just reply me and i can share more minute details...
Im glad that this is working as this is still not supported by Nortel & Cisco
Cheers !!
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Great JOB!!!!!!!!!!! You are first person in the history of CCM who have done this testing.
ReplyDeleteCould you advise me how can i create Extension from CUCM 2901 router on Nortel Ip phone 1140E?? Thanks
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