[cisco-voip] what to debug when calls disconnect "normally"?

[Justin Steinberg]

Is your client hearing an operator message/busy signal during the call which
is causing the calling party to end the call thus making it appear as though
the router is initiating the disconnect?

On Tue, Sep 16, 2008 at 3:46 AM, Kelemen Zoltan <keli at carocomp.ro> wrote:

> We have a client with CCME 4.3, 7940 and 7911 phones, and ISDN PRI
> complaining about some calls being dropped prematurely (they claim only
> calls to a certain, third party provider, not the one giving them the ISDN
> line).
>
> However, debugging isdn q931 shows only Cause code 0x8090, "normal call
> clearing" for all the calls they've mentioned as prematurely disconnected.
>
> While I tend to believe it's a problem on their provider's side, it still
> disturbing, that the router is the one initiating the disconnect, not the
> provider. The calls can last anywhere from 0 to 20 seconds, but always
> disconnect normally.
>
> Any idea, what to debug now, to find out more?
>
> thanks,
>  Zoltan
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