Sip trunk between CUCM 8.5 and asterisk

HI,

I want to add a SIP trunk between my asterisk and Cisco UCM 8.5. I read on some forums that it'll not work properly. Could you please advice the best procedure to do the same.

Thanks in advance.
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vijaydawdaAsked:
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José MéndezConnect With a Mentor Commented:
That wouldn't be true. I have configured trunks between the 2 just fine.

Add a new SIP trunk in callmanager pointing to Asterisk (I have tried this in version 1.8, not sure what will happen now that version 12 changed to pjsip stack). Use a SIP trunk security profile with an outbound transport of UDP. Unless you configure Asterisk with TCP, UDP will be the default. THis way you ensure that CM will talk over UDP as well.

CM will not attempt to register to Asterisk, and won't accept Asterisk to register with itself, so you won't need any type of registration parameters in Asterisk, but do remember to add a host= line with CM's IP.

Remember to reset the trunk in the CM side often until it works =)
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vijaydawdaAuthor Commented:
Thank you Mr. Willy,

Could you please provide me the step by step configuration
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