[cisco-voip] BRI connection goes up and down

[Ruben Montes]

Hello,

 

I have configured a BRI MGCP connection with a CCM 4.1(3) and a C3845
with IOS 12.3(14)T5.

 

I have a NM with 2 VIC with 2xBRI each one (4 BRI total). I have the
message B-channel out of service all the time in all the four BRIs. In
the router I can see line is going up and down all the time. I can see
that I receive a DISC from the telco (with a debug isdn q921) but I
don't know why. We have four BRIs so it is very strange to be a telco
problem...

If I do the config with H323 I haven't this error.

 

I'm pretty sure this a configuration issue related with ISDn
negotiation, but I don't know how to solve it (I've tried a bunch of
option in the CCM MGCP config page and also in the router...)

 

Regards,

 

Ruben

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