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.

Regards,
-Carl

On Thu, May 5, 2011 at 11:30 AM, me you <anunda19_at_gmail.com> wrote:

> How do VOIP phone register with CCM.
>
> Our network uses point to point RF links, and sometimes the RF takes short
> interference 30 sec to 1 min. This causes the VOIP phone to re-register
> with
> the call manager, and non-technical people think the network is down
> because
> the phone are re-registering. How does the VOIP phone know the signal has
> dropped? Does the phone use a type of hello or keepalive? can this value be
> adjusted in the Call manager. I tried simple google searches but i could
> not
> find the protocol or method the phone use to stay registered with the CCM.
>
> Thank you
> Rob
>
>
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Received on Thu May 05 2011 - 11:40:38 ART