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Configuring ISDN in Ireland to dial into London PRI

We have routers in Ireland dialing into London, we are unable to dial out.

The Layer 1 is alway deactivated, but if a call is made from outside to it will for layer 1 to be activated and then call can be made.

Once the call is completed and ISDN timeout it goes back to deactivated and we will be unable to make any call.

How can I keep layer 1 active without timing out?


Re: Configuring ISDN in Ireland to dial into London PRI

It's common in Europe for the TEI's to be removed in between calls and Layer1 deactivated; this is the purpose of the "isdn tei first-call" command, and this is normally enforced by the telco. If you want the TEI's assigned at all times and Layer1 to be up, then you should configure "isdn tei power" (default) and ensure the telco will provide the service. Even with "isdn tei first-call", we should still be able to dial out successfully. If you need to troubleshoot this further, check out "debug isdn event" and "debug isdn q921".

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