This document was generated from CDN thread
Created by: Philip s Walenta on 29-10-2009 02:44:09 PM
I am working with some third party SIP phones and have a few questions. I am trying to get shared lines functional across these devices.
They support the dialog-info+xml messages that are required for bridged line appearances.
My only problem is that I cannot get CUCM to send a subscribe to these devices to start the dialog process.
Anyone have any ideas?
Subject: RE: SIP SUBCRIBE and dialog-info messages
Replied by: David Staudt on 22-06-2010 06:01:21 PM
The UCM shared-line implementation for SIP uses some proprietary SIP extensions that Cisco developed. Access-to/usage of these extensions requires a special licensing agreement with Cisco IPCBU. UCM does not attempt to use (or respond to) the extensions when interacting with the built-in 'standard' 3rd party SIP device types. A SIP-extensions licensed 3rd party device will have a custom device-type installer (a Cisco Options Package, .cop, file) which will create a new device on UCM (which can then use SIP extensions.)
