Presence with third-party SIP phones

Unanswered Question
Oct 29th, 2009
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I am working with some third party SIP phones and am having a problem getting bridged line appearances working (shared lines).

According to the phone documentation, it should subscribe to the shared line appearance to get status updates.

I see these updates automatically going out to the Cisco SIP phones with the same shared line. I do not see any subscribe messages going to my third party phones.

I also see CUCM attempt to subscribe to CUPC.

How can I get CUCM to subscribe to my other SIP based devices?

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