Enabling Inbound Fax with Exchange 2007 SP1 UM

 

Before Exchange will receive an inbound fax, you must first update the a field in the Exchange UM server’s bin\globcfg.xml to True, and restart UM.

<!–

EnableInbandFaxDetection: Specifies whether inband fax detection is enabled

or not. The default setting is false and UM relies on the IP Gateways to

perform the FAX detection.

–>

<EnableInbandFaxDetection>false</EnableInbandFaxDetection>

 

That will, instead of waiting for the IP PBX to send a T.38 request, or a RFC2833 fax tone, UM actually will try to listen to the raw fax tone in the audio stream.