[cisco-nas] modem not negotiating when receive ANI on ISDN/PRI

[Rodney Kreisler]

Aaron,

Thanks for you assistance.

I attempted a reboot but something happened to our flash and the 
12.2(2)XA image was gone.  Because of my flash size limitation I am 
unable to upgrade to 12.3 at this time.  I did find an image for 
12.2(2)XB3 that installed.

At any rate, everything is working as expected now.

Thanks again.

Rod

Aaron Leonard wrote:

> Hi Rodney,
>
> Well, your debugs are bizarre.  Here's the crux of the failing call:
>
>> *Jun 14 15:00:00.719: Mica Modem(2/1): Call Setup
>> *Jun 14 15:00:00.719: csm_connect_pri_vdev: TS allocated at bp_stream 1,
>> bp_Ch 0,vdev_common 0x613A9618
>> *Jun 14 15:00:00.723: ISDN Se2:23: TX ->  CALL_PROC pd = 8  callref = 
>> 0x8242
>> *Jun 14 15:00:00.723:         Channel ID i = 0xA98381
>> *Jun 14 15:00:00.723: ISDN Se2:23: TX ->  ALERTING pd = 8  callref = 
>> 0x8242
>> *Jun 14 15:00:00.771: Mica Modem(2/1): State Transition to Call Setup
>> *Jun 14 15:00:00.771: Mica Modem(2/1): Went offhook
>> *Jun 14 15:00:00.771: CSM_PROC_IC2_RING: CSM_EVENT_MODEM_OFFHOOK at slot
>> 2, port 1
>> **Jun 14 15:00:00.771: CSM_RX_CAS_EVENT_FROM_NEAT:(006A):  
>> EVENT_CALL_IDLE at slot 2 port 1 cause 201*
>> *Jun 14 15:00:00.771: CSM_PROC_IC3_WAIT_FOR_RES_RESP:
>> CSM_EVENT_DSX0_DISCONNECTED at slot 2, port 1
>> *Jun 14 15:00:00.771: Mica Modem(2/1): Soft Reset
>> *Jun 14 15:00:00.775: CSM(2/1): Enter csm_enter_disconnecting_state
>
>
>
> The highlighted debug is the problem ... we are in the middle of
> setting up a call using ISDN, but suddenly NEAT (which is the
> framer code for the CT1) has told CSM (Call Switching Module, the
> IOS code responsible for modem call handling) that *CAS* (i.e. RBS)
> signaling has told it to hang up the call.  If ISDN signaling is
> being used on a span, then NEAT should never be looking for
> CAS A/B bit signal transitions - something has clearly gone awry.
>
> I do see that you have some spans configured for winkstart CAS
> (e&m-fgb) and others for PRI, so perhaps NEAT has gotten confused.
>
> One thought: have you reconfigured one of your T1s without rebooting?
> You shouldn't HAVE to reboot after a reconfiguration, but maybe
> the NEAT logic wasn't reset after a reconfiguration?  (Just a stab
> in the dark.)
>
> I was not able to find a known bug matching this syndrome.
>
> I do see that you are running 12.2(2)XA, which is somewhat iffy code.
> (It was the first 12.2 code with support for the AS5400 and for
> V.92/V.44.)  If the reboot idea doesn't help any, I would upgrade
> IOS ... I'd probably go to a 12.3 mainline image such as 12.3(5e)
> or 12.3(15).
>
> Cheers,
>
> Aaron
>
>