3rd Party SIP Phones and CUCM

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Aug 11th, 2010
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I'm looking to register an Avaya 9640G phone with CUCM 7 using SIP or H323 protocols. Not having a lot of luck, and I was wondering if anyone has had experience with this. Why I'm doing it is something I don't want to get into. Let's just say it's in the clients interest to have some Avaya phones on desks.


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Overall Rating: 4.5 (4 ratings)
David Hailey Wed, 08/11/2010 - 17:37
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The process to get a 3rd-party SIP phone to register is pretty much the same across devices; however, your endpoint may or may not support the parameters you need to authenticate the phone.  Here are 2 blogs that give instructions on how to register basic 3rd-party endpoints.  Don't get caught up on the vendors - just that each is a 3rd-party SIP endpoint that supports passing the information necessary to authenticate and register:




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c.registration Thu, 08/12/2010 - 06:37
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Thanks, that does help. I was able to register a X-Lite softphone with my basic SIP phone configuration. I still can't register the Avaya 9640G, but that's probably either my phone configuration or the proprietary nature of this Avaya phone.

David Hailey Thu, 08/12/2010 - 07:01
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I haven't specifically tried to register an Avaya phone to a Cisco cluster; however, you would want to check on whether or not the phone supports this configuration. SIP, while it is supposed to be an open protocol, is not. Each vendor implements things a bit differently. In addition, I believe Avaya uses a modified/proprietary implementation of H323 in some instances as well - that may be inaccurate as I haven't done much with Avaya outside of simply providing integration between CUCM cluster and Avaya PBX in a while.

Tommer Catlin Fri, 11/04/2011 - 09:19
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Sir Hailey -

In your testing, did you see anything in the SIP stacks that would be able to handle MWI on/offs?   Not so much with Avaya, but with any other 3rd party client.  I thought I had a feature comparision chart from Cisco that explained what was supported from a 3rd party SIP phone option... but I could be speaking from my backside.

David Hailey Mon, 11/21/2011 - 11:46
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I was mostly focused on the registration / setup and simple features like receving/making calls, etc.  That comparison chart does sound familiar...but what I'm thinking of may have just been Basic vs. Advanced 3rd-party device definitions/features.

William Bell Mon, 01/30/2012 - 21:16
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I am way late to the game on this thread but I have tested MWI for some SIP applications. I have found that MWI works on CounterPath products (Bria on Mac and iPhone, specifically), Media5fone (iPhone/iPod touch), and on sipDroid (Android).



TarasKotov Tue, 01/31/2012 - 01:14
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Hi, c.registration.

Can you make some dumps with a sniffer like tcpdump or Wireshark to look at those packets?


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