RE: How do VOIP phones stay registered with CCM

On Thu, May 05, 2011 at 11:40:38, Carl Gosselin wrote:
> Subject: Re: How do VOIP phones stay registered with CCM
>
> Rob,
> If the phones are using SCCP as their control protocol then they are
> (trying) to maintain a TCP connection with their CUCM.
>
> They do maintain keepalives to validate that the CUCM is active and
> they require this to know when to move from one subscriber to the
> other in the case of failure.
>
> This is all part of the phone system redundancy features.
>
> If your RF link is somewhat not stable this would explain the behavior
> that your users are depicting.
>
> Maybe moving to SIP for your phone would help.
>

SIP uses the same timers for registration message keepalives.

-ryan

Blogs and organic groups at http://www.ccie.net
Received on Thu May 05 2011 - 15:55:17 ART