[asterisk-users] University dumps CISCO VoIP for Asterisk

[Douglas Garstang]

Thanks for the plug Aaron. :)
 
We stuck OpenSER in between the phones and Asterisk, and pointed our phones towards the OpenSER boxes for SIP registrations and subscriptions. When OpenSER received a REGISTER or SUBSCRIBE message, it would use the send() command to forward the messages onto each Asterisk server. By doing that, ALL of our Asterisk servers had a copy of all sip registrations and subscriptions. It seemed to work pretty well, but for unrelated reasons, we dropped that approach. 
 
Doug.

	-----Original Message----- 
	From: Aaron Daniel [mailto:amdtech at shsu.edu] 
	Sent: Wed 9/20/2006 3:28 PM 
	To: Asterisk Users Mailing List - Non-Commercial Discussion 
	Cc: 
	Subject: Re: [asterisk-users] University dumps CISCO VoIP for Asterisk
	
	

	On Wed, 2006-09-20 at 22:25 +0200, Olivier wrote:
	> 2006/9/20, Aaron Daniel <amdtech at shsu.edu>:
	>
	>         The biggest problem we have with the hinting functions is that
	>         you have
	>         to have the phones registered to the same server, and with two
	>         identical
	>         servers that could theoretically serve any phone we have, it's
	>         a
	>         management nightmare to guarantee that any given phone will be
	>         on the
	>         same server as any other given phone.  On that note, for a
	>         small office,
	>         it would probably work great, it's just not feasible for us
	>         just yet, so
	>         we're looking into other options as well. :)
	>         --
	>
	> Hi Aaron,
	>
	> I didn't know  phones needed to be registered on the same server to
	> benefit hinting functions (as we mainly install small offices).
	>
	> Do you think this comes from SIP and NOTIFY-SUBSCRIBE messages
	> limitations or from current implementation ?
	> Could this be worked around using SER or other software ?
	>
	> Regards
	
	The problem occurs in the subscribe message, I believe.  The phone sends
	it's subscribe message to whatever server it's registered to, so only
	that server will know about it.  I know D. Garstang has done a lot of
	painful work on multiple clustered asterisk servers attempting to do
	stuff like this with SER, but we haven't done anything to that extent
	yet.  There are probably a number of code modifications we could make to
	replicate the information from server to server, but it seems like that
	would start to get somewhat unruly.
	
	--
	Aaron Daniel
	Computer Systems Technician
	Sam Houston State University
	amdtech at shsu.edu
	(936) 294-4198
	
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