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827-4v voip with e1 isdn pri+qsig

I have the following scenario in a client.

pbx -- 3810-v3(E1 isdn pri+qsig) ---- wan/internet ---- 827-4v(adsl) --pbx

site A site B

when we make a voip call from site A to site B, the ATM0 interface on the 827-4v holds, loosing internet access.

when we make a voip call from site B to site A, the call run's ok.

can anyone help us ?

regards ...


Re: 827-4v voip with e1 isdn pri+qsig

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center ( or speak with a TAC engineer. You can open a TAC case online at

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

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