Fax and 2 PSTN analogic


My config :
FW Console - FreePBX Utility version 13.0.187
and Fax Pro module

I’ve got 2 pstn analogic lines.
I tried to configure fax reception.
I think one should be mark specialy for fax. No?

For now I just plug one of my 2 pstn lines on an fxo port.

1/ Config 1
Inbound route :

  • DID : ANY
  • Set destination: Fax reception
  • Fax - Fax destination : Fax reception
    I got the fax no problem.

So now I tried to “link” this pstn line to this inbound route.

2/ Config 2
Inbound route:

  • DID : PSTN number of the line plugged in the FXO port
    and all remains the same.

but i got a busy tone when I tried to fax on that line.

Is this the right way?
Is there a tool to see if the pstn send the DID and how is it formatted?

log :
[2016-09-23 16:43:01] VERBOSE[11591][C-0000000c] sig_analog.c: – Starting simple switch on ‘DAHDI/3-1’
[2016-09-23 16:43:02] VERBOSE[11591][C-0000000c] pbx.c: – Executing [[email protected]:1] NoOp(“DAHDI/3-1”, "Entering from-dahdi with DID == ") in new stack
[2016-09-23 16:43:02] VERBOSE[11591][C-0000000c] pbx.c: – Executing [[email protected]:2] Ringing(“DAHDI/3-1”, “”) in new stack

So the system doesn’t send the DID.
Googling I found:


So : Connectivity - DAHDI channel DIDs
And you use the DIDs in Inboud Route.