Re: How do VOIP phones stay registered with CCM

Thanks to all the advice I received. it gave me several things to look at.

We looked at the keepalives and they were already set to station
keepalives 120 and stations and backup keepalives 240

Could one of the T timers cause a phone to re-register after an outage
of about 30 sec? or do VOIP's have some kinda security on them which
would force them re-register?

I was told we cant do srst because there are security flaws in the
Call manager express, and the DOD does not allow CCE. does anyone know
if this is true?

Thanks
Rob

On 5/5/11, Ryan West <rwest_at_zyedge.com> wrote:
> On Thu, May 05, 2011 at 11:30:00, me you wrote:
>> Subject: How do VOIP phones stay registered with CCM
>>
>> 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.
>>
>
>
> Take a look at the CCM service parameters for your publisher, the following
> two should give you what you need:
>
> Station and Backup Server KeepAlive Interval 60
> Station KeepAlive Interval 30
>
> The defaults are listed in seconds.
>
> -ryan

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Received on Sat May 07 2011 - 14:10:52 ART