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ISDN connection not breaking dial tone

ISDN connection not breaking dial tone

(OP)
An ISDN connection on our Nortel System is having a problem dialing out.  There is dial tone, however dial tone is constantly heard even after dialing a complete number.  Anyone know what might be causing this problem?

RE: ISDN connection not breaking dial tone

it sounds like the signals for the digits is not being sent over the line to the carrier. Try playing with your D-channel and switch type settings to see if that makes a difference.  

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RE: ISDN connection not breaking dial tone

Indeed - sometimes this can be that you have the device set for overlap when it should be set for en-bloc dialling.

Occasionally it's a problem with older (non-ETSI kit) connecting to newer ISDN (ETSI Compliant) lines.

RE: ISDN connection not breaking dial tone

Was this once a working system, or is this a new install?

Are we talking PRI or BRI

Has your PBX been upgraded lately?

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