I will be upgrading our gateways from 2851 to 3825 and migrating a few of the sites still on H.323 to MGCP. I good feel for both protocols but would like to know if anyone else has done this and what pitfalls to look out for.
I think you will be actually downgrading by changing to MGCP.
H.323 (or SIP) have more features: number manipulation, calling number routing, TCL/IVR scripting, simpler configuration, operates indipentelty from CM for toll-bypass, and much, much more.
MCGP have more cons that pro: confusing and buggy router configuration, contradictory switch to DP based config in SRTs,CME mode, and too many limitations that people realizes only after. The supposed advantages are relly much.
Other people may tell you differently, but the truth is that sophisticated, multi-site installations do not use MGCP.
The trick to MGCP is getting your working configuration and typing "no ccm config".
Haven't had many problems with QSIG, not more than anything else. I probably don't work with it as often as you might. I think most of them can get fixed, but the solution often requires changing some things you wouldn't expect.
Call progress messages with busy PI in QSIG / MGCP, CM hangs-up with as "normal call termination" and user is never give a chance to use "callback on busy". That from a recent thread and related loud complaining.
To be totally honest another thread reported the very same issue with sip on the ISR (no cm).
We're actually fixing that stuff in SIP from what I understand for some other various issues.
I could see that being a problem - just never run into it. I think the busy tone as a progress message is a European thing?
I understand MGCP if you have a simple deployment - maintaining a dial plan on all of your devices can be kind of a pain. I suppose you have to do it for SRST. Fact of the matter is that so many people use it because they don't have to do any gateway configuration.
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...