[cisco-voip] How can I maintain PSTN call during CCM <--> SRST mode change?

[Jorge L. Rodriguez Aguila]

No, There is no way to maintain a Call on a PRI on an MGCP Circuit because on MGCP the Gateway is dumbed down and is managed completely by the Call Agent (CCM). when the Link between these two is severed, The System no longer "knows" how to operate the circuit since Q.931 is backhauled to the ccm and so it comes down. At that same instant H.323 "fallback" takes over and brings the circuit up again. When communication is restored the same thing happens in reverse order. If you want to Preserve call integrity during a transition from and to srst you will need to switch to H.323.


Jorge Rodríguez Aguila
CCNA,CCVP,CRMCS,CIPCES
Senior Voice/Data Network Consultant
Netxar Technologies
jorge.rodriguez at netxar.com
Office 787-765-0058
PCS 787-688-8530




-----Original Message-----
From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Damien Ball
Sent: Monday, November 10, 2008 8:37 AM
To: syed.khalid.khursheed at gmail.com; James.Jung at telecom.co.nz
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] How can I maintain PSTN call during CCM <--> SRST mode change?

Using MGCP with a PRI, can you maintain a call during failover?  I thought I read that you could not.



Damien Ball
Network Engineer
A+, CCNA, ACDT, ACTC
Granville County Schools
Technology Department
101 Delacroix St.
Oxford, NC 27565
Office:  (919) 693-4613
Fax:  (919) 693-7391
>>> "Syed Khalid Ali" <syed.khalid.khursheed at gmail.com> 11/10/08 3:05 AM >>>
If using H.323 you can preserve calls on SRST fallback with the config
script below:
voice service voip
 h323
  no h225 timeout keepalive

I hope this helps.

Regards,
Khalid




On Mon, Nov 10, 2008 at 10:22 AM, James Jung <James.Jung at telecom.co.nz> wrote:
> Hi all,
>
>
>
> I tested call during registered to CCM and shutdown the WAN. After some
> time, the router went into SRST and the call disconnected.
>
> Also, during the SRST mode, when the WAN link came up, the call
> disconnected.
>
>
>
> How can I maintain PSTN call during CCM <--> SRST mode change?
>
>
>
> JamesJ.
>
>
>
>
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
_______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip

***************************************************************************************************
The Granville County School System does not discriminate on the basis of race, color, national origin, gender, disability, religion, or age in its programs or activities. If you have an inquiry regarding the nondiscrimination policies, please contact: Assistant Superintendent for Human Resources and Operations Granville County Schools, Oxford, North Carolina 27565, 919-693-4613. http://www.gcs.k12.nc.us
_______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip