How actually FAX should work?

[igor.snezhko]

Hi!
I was set my gateway to authomatically recognize t.38 calls. Then I configure inbound line (from gateway) to transfer all calls to internal fax extension. But when users call from faxes they complains that fax calls get busy. When I call to this line from standart phone I also get busy signal, no the fax tone.

10:52:32.598 Call::Terminate [CM503008]: Call(20): Call is terminated
10:52:32.598 Call::Terminate [CM503008]: Call(20): Call is terminated
10:52:32.582 LineCfg::getInboundTarget [CM503011]: Inbound office hours' rule for LN:20000 forwards to Fax:88
10:52:32.567 LineCfg::getInboundTarget [CM503011]: Inbound office hours' rule for LN:20000 forwards to Fax:88
10:52:31.161 CallCtrl:nLegConnected [CM503007]: Call(20): Device joined: sip:[email protected]:5100;user=phone
10:52:31.161 LineCfg::getInboundTarget [CM503011]: Inbound office hours' rule for LN:20000 forwards to Fax:88
10:52:31.145 CallCtrl:nLegConnected [CM503007]: Call(20): Device joined: sip:[email protected]:5060
10:52:31.004 CallCtrl:nSelectRouteReq [CM503004]: Call(20): Calling: FaxBox:88@[Dev:sip:[email protected]:5100;user=phone]

 

[weebnuts]

I'm getting the same problem, is it because 3cx does not support fax thru SIP provider?

 

[igor.snezhko]

No, I have full version with fax. 3CX cannot handle fax call for some reason :cry:

 

[N_G]

Fax support requires a licensed version and a supported gateway. Currently supported are Grandstream, Patton and Audiocodes.

If you have one of those gateways and are a 3CX partner then please contact support.

 

[rico06]

It seems that I am not alone not tounderstand how the fax T38 work

Yes I have a registered version !!!!

 

[N_G]

Do you have a supported gateway? Audiocodes, Grandstream or Patton. It seems you do not and fax is NOT supported if not using any of those gateways.

We can not test all combinations that are available on the market. Thats why we recommend particular gateways, phones and VOIP providers.

 

[igor.snezhko]

I use Dlink DVG-6004S (4 FXO). It's supporting T.38 protocol but cannot work with 3CX fax. Very strange!

 

[rico06]

and what about the linksys spa9000, can I use it as a T38 gatway and what configuration should I use ???