We have a CUCM 7.1.3 cluster at the head end and a handful of CMEs at branch offices connected via MPLS. I dont have the time or resources at the moment to convert each over to SRST. Our users are really wanting to start using 4 digit dialing between offices and I was wondering if just updating the dial peers on each CME to connect to each other over the MPLS links is advisable?
Any advice is appreciated, thanks!
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great thanks, how many sites would you say before your would implement a Gatekeeper to keep track of everything? In the book im reading, Cisco says 10+ sites. Thoughts? thanks
Well, it's up to you as GK is an expensive license. If the idea is to at some point to convert these to SRST sites, rather than using GK I would look into utilizing CUCM for centrelizing my dial plan, cheaper and a lot less complex.
ahha didnt know you could use the the CUCM to accomplish the gatekeeper tasks, makes sense though. Ill have to dig up some docs on it. thanks for the info.
It's not really GK tasks, but here is what you can accomplish with it:
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Have you see the CME SRND? Here is a section discussion CME to CUCM intgegration:
Sorry, you need to remove partner from the link, try this one:
So the more I think about it, Im thinking that converting the current CME over to SRST might be the best solution since Im going to get a two day window of downtime in this office in a few weeks.
I've done some reading and it doesn't appear to be that difficult to convert over to SRST. We already have the MPLS pipe between offices, we just need to add it into the CUCM and convert the current CME to SRST mode.
Yes, this is very straight forward. There are few things you need do do in CUCM:
On the GWs you have couple of options you can convert telephony-service to call-manager-fallback, or you can leave telephony-fallback and use CME as SRST feature which will give you more features under SRST condition, you can look this up in the CME admin guide.
My recommandation would be to do a pilot for one remote location to ensure you get the process down.
Im going to try and set up a pilot in my lab, though I dont have a PRI to test, ill most likely just use a sinlge pots line for PSTN calls.
I was thinking I would use CME as SRST so we get the added functionality it offers. If this is the case, I can use the majority of the config that already on the router correct? i.e. DN's ephone's, etc?
Correct, as long as the extensions are not changing from what they will be in CUCM.