SIP vs H323 trunks between CME to CUCM

[Abhilash MP]

Hi,

We have CME in Singapore and CUCM in swiss. IF we want to create a trunk which one would recommendable either H323 or SIP?

Please do clarify.

Thanks,

Abhilash MP

[Deepak Rawat]

There is not any specific reason why you will be choosing H323 over a SIP trunk or vice versa. Below is a thread wherein it had been discussed earlier as well that provides some good pointers on this

https://supportforums.cisco.com/discussion/9788281/why-choose-h323-vs-mgcp-vs-sip

Regards

Deepak

[Abhilash MP]

Thanks for the link Deepak.

[Chris Deren]

If the versions are recent, i.e. 8+ use SIP, if any side has older release use H323.

[Abhilash MP]

Hi Chris Deren,

First of all thanks for the information, You could please elobarate.

Current version of CUCM is 7.1.5. IF H323..please explain a bit pros and cors.

Thanks,

Abhilash MP

[Chris Deren]

With version 7.1 i would stick with H323, for integration between the 2 systems there is really nothing you gain from one protocol over another.

[Abhilash MP]

Hi Chris,

1.You mean to say V8 laters are recommended for SIPTrunk, then the older versions would go by H323 trunks. Correct me if I am worng.

Thanks,

Abhilash MP

[Chris Deren]

You got it.

[Abhilash MP]

Hi Chris,

Can i get link or fourm to capture the informatiom. Either from Cisco site or some other fourms.

Thanks,

Abhilash MP

[Abhilash MP]

Hi Chris,

in the below link:

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab09/clb09/trunks.html#pgfId-1131793

General H.323 Intercluster Trunk Deployment Considerations

Prior to Unified CM 8.5, H.323 Annex M1 trunks were the preferred choice for connections between Unified CM clusters.

Thanks,

Abhilash

[Chris Deren]

Exactly, so since one of your sides is version 7, H323 would be recommanded.

[Abhilash MP]

Thanks Again.

Regards,

Abhi

[Chris Deren]

No problem, don't forget to rate all useful posts!

[Muthurani Lavanya Paneerselvam]

Hi Abhilash

It actually depends on your requirement. best comparision of SIP and H.323 trunks for CUCM integration is available in this document.. please have a look and you will get some idea which one to choose.

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab09/clb09/trunks.html

Regards

Lavanya

[Vivek Batra]

Hi Abhilash,

Just to add one point other than excellent feedbacks provided before, SIP trunk could be a preferred choice in terms of ease of troubleshooting. Many people (like me too :) don't feel very much comfortable while troubleshooting many aspects of H.323 because of its inherent complexity. On the other side, SIP makes it relatively simple. However if you're equally comfortable working on both the protocols, it's a matter of choice then.

- Vivek