Is it possible for a Cisco ATA 186 to work off a Meridian 1 Opt81C PBX using H.323?

I have dual tone multi frequency (DTMF), but when I try to make a call, it goes off hook and I hear a busy signal. Is it possible that it's not translating or reaching an endpoint?

Is it possible for a Cisco ATA 186 to work off a Meridian 1 Opt81C PBX using H.323?

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It seems like your topology is as follows:
H.323 device←H.323→CiscoATA_FXS←Analog→Nortel Meridian FXO

It seems that you're making a call through the Nortel Meridian, perhaps from a phone set. The Meridian FXO line goes off hook and dials into the Cisco ATA but the ATA returns a busy tone.

One basic problem could be that the Nortel DTMF level cannot break the dial tone on the ATA.

You can use a network Sniffer, such as Ethereal, to see if the ATA 186 collects all the digit information from the Nortel and sends this out properly on the Ethernet interface.

If a gatekeeper is being used in the H.323 network, one of Cisco's web pages mentions a problem to look out for.

This was first published in March 2006

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