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New Member

ISDN BRI L2 problem in Austria

Installing BRI's for South-Africa Embassy in Vienna.Isdn is connected to telco l1is up but L2 shows the following:

Layer 2 Status:

TEI = 255, Ces = 1, SAPI = 0, State = ESTABLISH_AWAITING_TEI

Please help tried everything

  • Other Collaboration Voice and Video Subjects
Hall of Fame Super Red

Re: ISDN BRI L2 problem in Austria

Hi Stefan,

Have a look at the following;

How about if you add "no dial-peer outbound status-check pots" in global config :

From Zulfiqar in this excellent Cisco ask the Expert Archive;

or this thread from June of this year;

Hope this helps!


"May your heart always be joyful And may your song always be sung May you stay forever young " - Dylan
New Member

Re: ISDN BRI L2 problem in Austria

I've never used BRI for voice (it's not all that common for voice in the US), but when doing PRI, whenever you see ESTABLISH_AWAITING_TEI or TEI_ASSIGNED...really anything other than MULTIPLE_FRAMES_ESTABLISHED it means the Signaling or D-Channel isn't up. If I had this issue with a PRI, I would first verify with the carrier that they have turned up the D-Channel, That my framing and signaling types were the same as what is being used by the carrier (this may or may not apply to BRI). I would also run a debug on the ISDN Q921 (ISDN Layer 2) to make sure that I was transmitting and that I was recieving packets back from the carrier.

New Member

Re: ISDN BRI L2 problem in Austria


Thanks for replays, tried not working.

Did debug isdn q921 it looks like i am not getting signal from telco