3CX fax and VOIP Providers

Discussion in '3CX Phone System - General' started by commvisi, May 18, 2011.

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  1. commvisi

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    Hi,

    I have been reading FAQ’s etc. and am still confused regarding 3CX Fax with VOIP providers.

    We are currently a licenced v9 customer and I have had attempted allocating one of our VOIP lines to the built in extension 888 Fax Server. If I look at Port/Trunks Status when I call in I can see the destination flash up as 888, but then the call is dropped.

    Does 3CX handle SIP trunks directly to the inbuilt fax server, or do I need some middle ware or physical device to connect the inbound fax, then relay this to 3CX.

    3CX log for my inbound fax call
    Code:
    09:07:27.466  [CM503008]: Call(17): Call is terminated
    09:07:27.139  Remote SDP is set for legC:17.2
    09:07:25.833  Session 13388 of leg C:17.1 is confirmed
    09:07:25.680  [CM503007]: Call(17): Device joined: sip:888@10.4.1.43:5100;user=phone
    09:07:25.674  [CM503007]: Call(17): Device joined: sip:xxxxxxxxx@sipprovider:5060
    09:07:25.673  [MS210007] C:17.1:Answer provided. Connection(by pass mode): 10.4.1.43:10002(10003)
    09:07:25.671  [MS210001] C:17.2:Answer received. RTP connection[unsecure]: 10.4.1.43:10002(10003)
    09:07:25.669  Remote SDP is set for legC:17.2
    09:07:25.669  [CM503002]: Call(17): Alerting sip:888@10.4.1.43:5100;user=phone
    09:07:25.607  [CM503025]: Call(17): Calling @[Dev:sip:888@10.4.1.43:5100;user=phone]
    09:07:25.606  [MS210006] C:17.2:Offer provided. Connection(by pass mode): x.x.x.x:39898(39899)
    09:07:25.561  [CM503004]: Call(17): Route 1: @[Dev:sip:888@10.4.1.43:5100;user=phone]
    09:07:25.560  [CM503010]: Making route(s) to <sip:888@10.4.1.43:5060;user=fax>
    09:07:25.560  [MS210000] C:17.1:Offer received. RTP connection: x.x.x.x:39898(39899)
    09:07:25.559  Remote SDP is set for legC:17.1
    09:07:25.559  [CM505003]: Provider:[sip provider] Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [] PBX contact: [sip:xxxxxxxx@x.x.x.x:40691]
    09:07:25.550  [CM503001]: Call(17): Incoming call from xxxxxxxxx@(Ln.10005@sip provider) to <sip:888@10.4.1.43:5060;user=fax>
    09:07:25.247  [CM503012]: Inbound office hours rule (unnamed) for 10005 forwards to Fax:888
    09:07:25.245  Looking for inbound target: called=xxxxxxx; caller=xxxxxxx
     
  2. davidbenwell

    davidbenwell Active Member

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    Hi, 3CX can receive incoming faxes directly, however your VoIP Provider MUST support T.38 for this to work
     
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  3. dannybrook

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    I am having the same problem right now with Nexvortex, who is supposed to support T.38 faxing with 3CX.
     
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