<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Verdana; font-size: 10pt; color: #000000'>I have seen minutes go by before a phone registers to SRST. It has to do with the timeouts and retries connecting to the CallManagers though. We have three listed so it takes up to 6 1/2 minutes with the default timers on a VG224 for example. A phone takes about 2 to 3 minutes (you can't change the timers for the phones). You could lower the number of subs in the phone list to speed things up a bit i guess.<br><br>You'll have to pay for it one way or another, hardware (ISR vs MCS) and licenses (SRST vs node license). In v8 and new licensing you could put a server out there a bit cheaper now. You would maintain all functionality as well as a speedier recovery (using the local server as the primary would have no downtime at all).<br><br>But there's something about having to maintain a box out there that just doesn't sit well with me. Setting up an SRST box is pretty much set it and forget it.<br><br>If you don't have a lot of WAN outages, it's not a bad compromise.<br><br><span><br><span name="x"></span>---<br>Lelio Fulgenzi, B.A.<br>Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1<br>(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)<br>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^<br>Cooking with unix is easy. You just sed it and forget it. <br> - LFJ (with apologies to Mr. Popeil)<br><span name="x"></span><br></span><br><hr id="zwchr"><b>From: </b>"David Zhars" <dzhars@gmail.com><br><b>To: </b>cisco-voip@puck.nether.net<br><b>Sent: </b>Sunday, December 12, 2010 10:28:04 AM<br><b>Subject: </b>[cisco-voip] Quick failover and SRST<br><br>We have 7 buildings all connected via fiber. Each building has a 2801 for SRST and 911 handling.<br><br>As an upgrade, we are going to install a redundant CM (version 8.x). I have one site that needs quick failover, and most of the reading I have done implies about 40 seconds is required to recognize failure of the primary, and initiate handoff to the subscriber. I know there are some settings to speed this up as well.<br>
<br>My quesiton is, should I keep SRST now that I will have redundant CMs? Could they somehow assist in that 40 second timeframe, or are they sort of the subscriber when you don't have a redundant CM? What would I gain by keeping SRST with a redundant CM? <br>
<br>And I'm just curious, but how does Cisco license the redundant CM? Same prices and maintenance as a regular CM?<br><br>thank you!<br>
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