[cisco-voip] MGCP Fallback to H323 fails with frac pri and ccm-manager config

[Jason Aarons (US)]

In production we are seeing no known issues with  "pri-group timeslots
1-10,24 service mgcp"  (minus ccm-manager config) back to CallManager.

 

Am I missing something, is something broke I am not seeing? I'm
wondering if I should go back onsite and re-work it to H.323?

 

http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a00806
fedbe.shtml

 

I was thinking the above document had old info and needed tech review. I
thought it was unsupported as older IOS didn't allow timeslots 1-X,X
service mgcp.  Remember when service mgcp was application mgcpapp on the
voice-port? Versus being on the controller and timeslots?

 

I've seen FXS voice ports randomly shutdown in IOS, so from a best
practice I've been removing ccm-manager config once the router is
up/working.

________________________________

From: Kevin Thorngren [mailto:kthorngr at cisco.com] 
Sent: Friday, November 03, 2006 10:46 AM
To: Jason Aarons (US)
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] MGCP Fallback to H323 fails with frac pri and
ccm-manager config

 

No, this is not a bug. CallManager does not support fractional T1/E1
MGCP ports. So with the "ccm mananger config" command, CallManager will
update the GW with the config file which includes all the channels for
the T1/E1 port. 

 

Kevin 

On Nov 3, 2006, at 10:34 AM, Jason Aarons ((US)) wrote: 

	 

	Before resetting gateway 12.4(9)T in CallManager via CCMAdmin 

	controller t1 0/0/0 

	pri-group timeslots 1-10,24 service mgcp 

	! 

	ccm-manager config 

	  

	  

	  

	After resetting gateway in CallManager 

	controller t1 0/0/0 

	pri-group timeslots 1-24 service mgcp 

	! 

	ccm-manager config 

	  

	The Trombone feature in ccm-manager config would replace the 10
channels with all 23 B Channels causing SRST to attempt to use Channel
23 which doesn't exist, resolution was to remove "ccm-manager config" 

	  

	Is this a bug in CallManager? 

	  

	  

	 

	From: Jason Aarons (US) 

	Sent: Tuesday, October 31, 2006 8:28 PM 

	To: cisco-voip at puck.nether.net 

	Subject: RE: [cisco-voip] MGCP FAllback to H323 

	  

	In 12.4(4)XC I had FXS ports randomly shutdown on
2811/VIC2-4FXO, fix from TAC was to remove ccm config -jason 

	  

	 

	From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Joe Pollere
(US) 

	Sent: Tuesday, October 31, 2006 7:09 PM 

	To: Ruben Montes (EU); cisco-voip at puck.nether.net 

	Subject: Re: [cisco-voip] MGCP FAllback to H323 

	  

	Ruben, 

	  

	Had similar issues in the past; If you are using the ccm config
server and ccm config commands Tac says that there is a long history of
problems with them. Once the ports are initially configured via CM (and
ccm config server); the ccm config server and ccm config command should
be removed. 

	  

	Joe 

	 




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