[cisco-voip] One-way voice on T1

[Madziarczyk, Jonathan]

Thanks everyone for the great responses, I am using the NI2 protocol.  I
will look up the commands you are talking about and try to find some
answers from that as well.

In answer to the other question about calling TAC.  I already have a
case open with them.  However TAC has been abnormally lax in this
particular case.  I asked this same question to my engineer over a week
ago and never got any response about it.

It's nice to see so many useful responses to my question so quickly.

Jon


-----Original Message-----
From: Voll, Scott [mailto:Scott.Voll at wesd.org] 
Sent: Wednesday, May 04, 2005 11:55 AM
To: Madziarczyk, Jonathan; cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] One-way voice on T1

What signally protocol are you using between the router and PBX?  Qsig?

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Madziarczyk,
Jonathan
Sent: Wednesday, May 04, 2005 9:41 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] One-way voice on T1

This is what I have set up:
CCM4.1 -> MGCP 2621XM-T1 -> NEC2400 IMX-T1 -> NEC PBX -> NEC2400 IMX-T1
-> PSTN.

Between the 2621XM and the directly connected NEC T1 lines 1-4 and 17-24
work fine in both directions.  However lines 5-16 only work incoming (to
the CCM).  Outgoing does not work at all, regardless of who initiates
the call and whether the destination is the PBX or the PSTN.

I'm at a total loss, on the Cisco side we've replace everything but the
chassis on the 2621XM, on the NEC side we've replace the T1 card and
even tried a different slot in the chassis.

After some NEC diagnostics, they verified that they did see "hex
traffic" (voice audio) and the IE display name come across on the good
calls (1-4, 17-24) but only saw IE display name come across on the bad
calls (no hex traffic).

I have verified that I am seeing RTP in both directions over the IP
network on both good calls and bad calls.  I even recompiled it in
Ethereal as a wav file and heard the audio in both directions.

Is there any way I can verify that the 2621 is actually sending voice
traffic across the bad lines?

Any other input would be EXTREMELY APPRECIATED.

Thx.
Jon 

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