Re: How do VOIP phones stay registered with CCM

Hi,

My company also provides CCM IP Telephony over vsat links and it works well,
we usually dont have problems. If you look at the keepalive parameters, you
will find something like that:

*Station KeepAlive Interval :*

This parameter designates the interval between KeepAlive messages sent from
Cisco IP Phones to the primary Cisco CallManager.
This is a required field.
Default: 30.
Unit: sec.
Minimum: 10.
Maximum: 1000.

You can always play with these settings, we have over 500 vsat with ipt
deployed and we use the default (30 secs) , it works well.. we also have
srst in place to make sure local telephony works on a failure.

Regards,

2011/5/5 me you <anunda19_at_gmail.com>

> 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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