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ATA 186 and Clarent H323 Gatekeeper


I try use ATA186 with Clarent GK (H323), and I have a problem.

I can correctly register ATA into Clarent GK, but I can't make any calls from ATA186.

I run sniffer to observed packets between ATA186 and Clarent GK.

The registration proccess is OK.

But any calls end unsuccessful. ATA sends SETUP with phone number to GK, but

GK doesn't recognize it (packet)

and doesn't send CALL PROCEEDING packet.

It seems like Clarent GK doesn't "understand" ATA186 H323 SETUP message...

I compared H323 SETUP packet from ATA186 to Clarent GK and from 827-4v to

Clarent GK, and they seems different :((

Where the problem can be??

Does anybody help me??

Krzysztof Legenza


Re: ATA 186 and Clarent H323 Gatekeeper

Often times complex troubleshooting issues are best addressed in an interactive session with one of our trained technical assistance engineers. While other forum users may be able to help, it’s often difficult to do so for this type of issue.

To utilize the resources at our Technical Assistance Center, please visit and to open a case with one of our TAC engineers, visit

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

Thank you for posting.

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