Summary:ASTERISK-06985: Implementing Paging on the Linksys SPA9XX phones
Reporter:John Lange (johnlange)Labels:
Date Opened:2006-05-16 23:23:27Date Closed:2011-06-07 14:03:23
Versions:Frequency of
Environment:Attachments:( 0) spa9000page
Description:To date all paging systems have involved pulling a whole group of phones set to auto-answer into a meetme conference room using traditional SIP. A bit of a hack to say the least.

The Linksys SPA9XX phones (941, 942 etc) have the ability to page a large number of phones using an RTP multicast system. As far as I'm aware this is the first "real" paging system available on a SIP phone.

Currently this paging system only works when the phones are combined with the Linksys SPA9000 key system and not with Asterisk.

I believe it would not be a great deal of work to implement this system in Asterisk.

Attached to this message is a small packet capture (captured using Ethereal) from a page session. The SPA9000 is at, the SPA941 is at

A brief description; A group page is initiated on a SPA941 by dialing *96 and then selecting "pagegroup" from the corporate directory. The first few packets are the phone requesting the corporate directory.

The actual page starts at packet 8 with a UDP signaling broadcast on port 6061 which I assumes tells all the phones to get ready for the coming RTP broadcast which follows.

I'm looking for advice on a way to add this feature to Asterisk as well as other interested parties which might be willing to help.
Comments:By: Olle Johansson (oej) 2006-05-17 02:09:01

The bug tracker is not a good place for discussions or feature requests. Please mail this out to the asterisk-dev mailing list.

By: John Lange (johnlange) 2006-05-17 08:48:41

I'll be happy to post it to the development list but I should point out that the posting instructions say this is the place:

"To track bugs, features, and miscellaneous (documentation) elements that need to be discussed in a permanent, semi-threaded manner and which can more easily store programmatical or textual difference files ("diff -u") in a manageable way."

"The secondary use is to track feature requests..."

By: Olle Johansson (oej) 2006-05-17 11:19:45

Yes, it says so. But as I point out, if you really want to discuss, use the mailing list. This is not a good forum even if the bug guidelines suggests you can use it that way. We will leave it open for a while, then simply close it. Mailing list is much more effective if you want result.

By: Joshua C. Colp (jcolp) 2006-05-17 19:49:29

Closed per oej's note. Continue discussion on the mailing list and when something fruitful appears - come on back.