[cisco-voip] SRST Switching to Subscriber Site?

Sat Mar 22 22:38:39 EDT 2008

I guess in this case the ideal solution would be to have SRST CFNA or CFWB out the PSTN into the Unity at HQ<mailto:Unity at HQ> for VoiceMail during an SRST situation. For AA you can have a Tcl Script or have a live operator during the SRST condition.

Either that or have the local users in a CUE integrated via networking to the Unity at the Main Site.

Jorge

________________________________
From: Lelio Fulgenzi [lelio at uoguelph.ca]
Sent: Saturday, March 22, 2008 10:36 PM
To: Jorge L. Rodriguez Aguila; James Buchanan; Miller, Steve; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] SRST Switching to Subscriber Site?

a couple of questions:

 *   does unity support SRST? if so, how about distributing a small unity server out there. dialing domains would allow the grouping and it's less likely to be upgraded as frequently as callmanager.
 *   does unity express support unified messaging with exchange? if so, go with unity express as your messaging solution (i know it supports SRST w/ SIP) and unity express and unity can be networked.

if it was me, I would do everything i could to eliminate distributing my subscribers. the hassel of upgrading them and repairing them would be a nightmare. especially if you don't have onsite support. the amount spent travelling, buying additional hardware could be better spent solidifying your WAN connection and/or looking for a backup.

there seems to be some pretty good bandwidth on 3G networks now and you can buy 3G interface cards for ISRs. is some QoS you can policy route only voice traffic when the link goes down.

that's just me.

--------------------------------------------------------------------------------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
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"Bad grammar makes me [sic]" - Tshirt
----- Original Message -----
From: Jorge L. Rodriguez Aguila<mailto:jorge.rodriguez at netxar.com>
To: James Buchanan<mailto:jbuchanan at ctiusa.com> ; Miller, Steve<mailto:MillerS at dicksteinshapiro.com> ; cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Sent: Saturday, March 22, 2008 9:50 PM
Subject: Re: [cisco-voip] SRST Switching to Subscriber Site?

You are Correct;

 All messaging system infrastructure components must be located on the same highly available LAN as the Cisco Unity server(s) that they service.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/6x/unity.html#wp1044699

Jorge

________________________________
From: James Buchanan [jbuchanan at ctiusa.com]
Sent: Saturday, March 22, 2008 9:41 PM
To: Jorge L. Rodriguez Aguila; Miller, Steve; cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: RE: [cisco-voip] SRST Switching to Subscriber Site?

Hello,

According to the UCM 6 SRND, all messaging components, including the Exchange server and Unity server, are to be located on the same LAN. So, you cannot move the Exchange server to the remote site unless the Unity server will be at that same site in a unified messaging configuration.

Thanks,

James

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jorge L. Rodriguez Aguila
Sent: Saturday, March 22, 2008 7:46 PM
To: Miller, Steve; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] SRST Switching to Subscriber Site?

The answer I guess is conditional. For a 100 Users you can keep a centralized deployment and do SRST. Putting a Callmanager Sub at this location will require you to Put a larger Pipe between this site and the HQ, as at least 1 Meg will be needed for ICCS between CCMs.  In terms of the Unity Box, It doesn’t matter where the Mailbox resides as the Unity will pass the message into the Exchange cluster via the server he is homed to and will arrive into the mailbox of the person no matter which server he resides in. If you are indeed thinking about the Sub at the remote site you should keep in mind that you would still be passing the traffic along to the Unity box in the Central site unless you put one at the remote site as well, Otherwise if your Wan Link goes down, you will still have CCM capabilities but your calls routed to the AA will fail.

Jorge

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Miller, Steve
Sent: Friday, March 21, 2008 11:41 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] SRST Switching to Subscriber Site?

We have a site which is changing.  They are a remote site, currently operating as an SRST site, but their Exchange server (currently at the home office) is going to be moved to the remote location.  We have unified messaging and we currently have A Pub and Sub at our home office and a remote Sub at another office. Is it mandatory in such circumstances that we install a Call Manager and Unity box for this third site?  They have about 35 users - and may have as many as 100 in the next couple years.  Any suggestions?

Steve Miller
Telecom Engineer
Dickstein Shapiro LLP
1825 Eye Street NW | Washington, DC 20006
Tel (202) 420-3370| Fax (202) 330-5607
MillerS at dicksteinshapiro.com<mailto:MillerS at dicksteinshapiro.com>

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