[cisco-voip] Phones displaying CM Down during calls.

[Leonardo D'Urso]

Hi Matt

the phones and the callmanager servers are in the same building or there is
a WAN connection between?

regards
Leonardo


2007/12/13, Matt OLIVER <Matt.Oliver at team.telstraclear.co.nz>:
>
>  Hi there,
> I have a number of phones  (20 out of 192 in one VLAN) that are coming up
> with CM Down during calls. I know that this is caused through the phone
> being unable to talk to the call manager via skinny, however we are having
> no phones rehome to other Call Managers, and in the particular building we
> have 600+ users and this is only affecting 20 users all of whom are in the
> same VLAN.
> The VLAN configs are all the same and deployed in the same manner across
> 8500 phones. There are 4x 3560-48 switches in the affected VLAN.
> These connect via GBIC uplink ports to redundant 6509 core switches.
>
> We are seeing no errors on the WAN, or interfaces, in fact the only please
> the error is seen is on the phones themselves, and it is intermittent. The
> IOS version is 12.2(25)sec which again has been deployed on over 400 of
> these in the network.
> It seems link only skinny is affected, the users are not complaining of
> data errors and the calls are not being cut off, although the caller is
> reporting hearing a loud noise when it happens.
>
> I have seen a few other threads that mention a similar error, however I
> cant seem to find any answers on this.   Any ideas would be greatly
> appreciated.
>
>
> Regards Matt
>
>
>
>
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