Hi guys,

I'm very confused about how fax relay works in a Cisco VoIP environment. I've read all the documents I could find, but questions remains.

Do I have to apply the directives on a dial-peer with the destination-pattern set as the fax extension number ?

Or does the system automatically detects if the call is a voice call or a fax call ?

In fact, I don't quite understand how I can define what devices should use fax relay (cisco protocol, not t38)

Here's an example of what I've done so far.

37002 is the extension number of a fax in a remote office.

dial-peer voice 37002 voip

destination-pattern 37002

fax-relay ecm disable

fax-relay sg3-to-g3

fax protocol cisco

Is that right ?

Thanks !