[cisco-nas] strange MICA behaviour : Disconnect Reason Info: (0x6102)

[Aaron Leonard]

> >> I have an AS5300 with 2 MICA modules which has ~60 success rate. The
> >> quite common
> >> disconnect reason is the following...DSP is the one that worries me...
> >
> >
> > All this means is that it was the DSP that decided to hang up.

> >> Should i replace the chassis or both the mica modules?
> >
> >
> > I don't see any reason why - these just look like normal modem
> > trainup failures.
> > If "show modem" shows that certain specific modem lines have much lower
> > CSR than others, then this could be a DSP problem however, since
> > we made it thru the V.8bis exchange phase etc. OK, it doesn't
> > look like it.

> These are the detailed logs:

>          Avg Hold     Inc calls     Out calls    Busied   Failed    No     Succ
>    Mdm     Time      Succ   Fail   Succ   Fail    Out      Dial   Answer   Pct.
>    1/0   00:18:57      13      2      0      0       0        0       0     87%
>    1/1   00:11:25      11      6      0      0       0        0       0     65%
>    1/2   00:12:06       7     10      0      0       0        0       0     41%
> * 1/3   00:17:01      12      4      0      0       0        0       0     75%
>    1/4   00:23:46       8      6      0      0       0        0       0     57%

> As you can see there are no specific modems which have problem. Most of them have.

Agreed.  This looks like a circuit problem, not a DSP problem.

> Also "sh contr e1" doesn't show any errors.

In that case, it is a circuit problem on the far side of
your local switch.

Aaron