Incoming calls over BRI are terminated after 11 minutes!

[amprantino]

Hello,

I have 4 BRI lines; all configured the same way and all are located to EU.

Lets focus to one of them, BRI 0/0/0.

All incoming calls to this BRI are terminated after exactly 11 minutes.

Here is the output from the q921 & q931 debugs:

ISDN BR0/0/0 Q921: User TX -> RRp sapi=0 tei=117 nr=3
ISDN BR0/0/0 Q921: L2_EstablishDataLink: sending SABME
ISDN BR0/0/0 **ERROR**: handle_l2d_srq_mail: Layer 1 inactive
%ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/0/0, TEI 117 changed to down
ISDN BR0/0/0 Q931: L3_ShutDown: Shutting down ISDN Layer 3

At this point the call is interrupted.

Here is the configuration of the port:

interface BRI0/0/0
 no ip address
 isdn switch-type basic-net3
 isdn tei-negotiation first-call
 isdn point-to-point-setup
 isdn incoming-voice voice

voice-port 0/0/0
 translation-profile incoming INOUT
 compand-type a-law
 cptone GR
 bearer-cap Speech

Any ideas what could cause this issue?

Best Regards

[Ryan Huff]

So anytime you have a consistent time where a call is dropped / cut off .... its likely due to a timer of some sort, somewhere. Or potentially, but less than likely, could also be voice activation detection (VAD).

HOWEVER, in your log snip here you are showing a L1 error in the log. Do you see that same log every time the call drops? Layer 1 issues are usually cabling/wiring or physical hardware (cards ... etc). Unless, the far end is doing something to bring down the connection (which shows up on your side as L1 down).

Try setting "dialer idle-timeout 900" under the BRI interface.

Thanks,

Ryan

(.. Please rate helpful posts ..)

[amprantino]

Yes, every time I see the same error message (L1 down)

The command "dialer idle-timeout 900" is not available under the BRI interface