On Fri, 8 Aug 2003, cwitte wrote:
There was a thread a few months ago that tossed around some ideas for using a cisco phone for intercom or paging. I don't have any ip phones, and wondered if anyone had any luck getting intercom or paging to work on the cisco units.
The Ciscos should be able to do this via a XML Service using the RTPTx: and RTPRx: URI schemes. The tricky part is just pushing the RTPRx to the listening phone.
XML service specifications are here: http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_administration_guide09186a008018e234.html
Cheers, Siggi
I don't think this is possible, from my understanding of the Cisco firmware using SIP images. While it may be possible to initiate receipt of an RTP stream from an XML command, how do you get the Cisco to execute the XML command to begin with, without having the user push keys to start up the process? Caution: to not believe the Cisco manuals are correct when they say that the SIP O/S on the phone runs a web server. They do not. The only way that I have discovered the Cisco 79xx phones can download a URL from a remote server are via either user interaction (pressing a sequence of keys) or by putting together a really UGLY XML page that "refreshes" every few seconds. But even this suffers from the problem of: "How does the first page get requested?"
I'd be happy to be proven wrong in my assertion that intercom and paging is impossible with Cisco SIP phones. Please send code. :) Now, if all your comments are about SCCP phones, can you send along the SCCP driver for Asterisk so the rest of us can play?
PS: If one could initiate XML requests remotely, perhaps a better way to do intercom/paging would be to use the "Play" command, and (if possible) use a pipe on the server side to connect to a live audio stream. (sigh) If only I could control the phones from the server...
JT
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