[cisco-voip] Phone System Outages

[Jonathan Charles]

One-way audio is almost always a routing issue, my guess is that you
have a duplicate route to a subnet or a duplicate IP taking over a key
layer-3 routed interface.



Jonathan

On Sat, Jul 12, 2008 at 7:42 AM, Todd Franklin <toddnh65 at gmail.com> wrote:
> Environment:
>
> CCM 4.1, Unity version 4 also.
> 3560s, 2801s.  6 buildings all linked by fiber.  Each building has a 2801
> and 3560.
> Total phone count: 60, mostly 7940s, some 7912s, a few 7960s.
>
> All fiber runs back to main location where it joins the network through
> GBICs on 3560s.
> At the main location we have a PRI that goes into a 2801.
>
> Problem:  3 times in the last year, we will get a situation that goes like
> this:
> Pressing 9 to dial out, and dialing your number:  Phone shows call is
> completed, starts counting the seconds, but you hear nothing.
> If we call another extension internally, they will hear us but we cannot
> hear them.
> If someone calls in from outside and gets the auto attendant, no input is
> accepted, the attendant just keeps going.  (i.e. Press 2 for this, she just
> keeps going, you can press as many buttons as you like, no change).
>
> The solution seems to be to reboot the main 2801 with the PRI.  I am not
> sure why this would cure internal extension-to-extension calls, but it
> does.  My facility runs 24 hours a day, so a reboot is never a good thing.
>
> Where should I start looking?  Broadcast storms?  Is this a sort of known
> bug that Cisco might have fixed somewhere?  Anything in Unity or CCM I
> should look at?  Counters on ports?
>
> Would appreciate any direction at all!
>
> Todd
>
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