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
fax-relay ecm disable
fax protocol cisco
Is that right ?