[cisco-voip] SCCP/SRST with Extension Mobility what happens?

[Wes Sisk]

Agreed.

With strict SRST the phone tells the SRST reference what DN it is using.  Thinks like EM logout and EM timeout would not be supported but the EM DN would register without issue. Then it depends on call routing configuration on your SRST device.

With CME-as-SRST it is my understanding that phones go through a more typical registration process where CME tells the phone what DN to use.  

/wes

On Oct 20, 2011, at 11:38 PM, Mike Wilusz (miwilusz) wrote:

Any logged in EM phones will remain logged in and will register to the SRST register with the EM extension. Keep this is mind though when configuring the SRST dial-plan.  Can get tricky to manage if there's a lot of EM usage between different SRST sites.  While in SRST, no one will be able to login or logout as the EM service will be unavailable.

-mike

From: Jason Aarons <jason.aarons at dimensiondata.com>
Date: Thu, 20 Oct 2011 23:08:53 -0400
To: "cisco-voip at puck.nether.net" <cisco-voip at puck.nether.net>
Subject: [cisco-voip] SCCP/SRST with Extension Mobility what happens?

Customer is using Extension Mobility and SCCP/SRST (call-manager-fallback). I have to admit I can’t recall every testing EM with SRST and don’t know what happens or will break ,etc.
 
Does anything happen to Logged In (Extension Mobility) users  when they go into SRST? Works like normal?
 
Would there be any particular benefits for EM if we switched to CME-as-SRST?
 
Wow, 98mph fast ball. I’d swing at that too…
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