Fax is not accepting incomming calls

Discussion in '3CX Phone System - General' started by mart3cx, Jun 22, 2011.

Thread Status:
Not open for further replies.
  1. mart3cx

    Joined:
    Jul 1, 2010
    Messages:
    19
    Likes Received:
    0
    Hi,

    i have 3CX V10 Sp1. The fax has an analog line and is connected with linksys spa2102 adapter to the 3cx. Outgoing faxes are working fine. But when I try to get an fax (incomming) the call is terminated after some seconds and the in the log apears . The fax machine is an adler-triumph dcc2725

    ...
    10:09:40.333 [CM503008]: Call(128): Call is terminated
    10:09:40.328 [CM503021]: Call(128): ACK is not received
    10:09:38.424 Currently active calls - 1: [128]
    10:09:10.747 [MS210002] C:128.1:Offer provided. Connection(transcoding mode): ....
    10:09:10.746 [MS210000] C:128.2:Offer received. RTP connection: ....
    ....

    TX
    Mart
     
  2. leejor

    leejor Well-Known Member

    Joined:
    Jan 22, 2008
    Messages:
    10,765
    Likes Received:
    286
    I suggest you do a search through the forum, you will find that you are not the only person to encounter fax problems. There are many factors to take into account (provider/gateway, ATA settings/make, Fax machine make), some people have overcome their issues, but, others have realized that it just will not work, in their case.
     
  3. KerryG

    KerryG Active Member

    Joined:
    Jun 19, 2009
    Messages:
    960
    Likes Received:
    0
    It is generally a bad idea to try to run a fax machine through an IP PBX. You are introducing latency and adding packet handling. This is usually bad for faxing.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  4. eagle2

    eagle2 Well-Known Member

    Joined:
    Apr 27, 2011
    Messages:
    1,085
    Likes Received:
    11
    I have a customer with VoIP provider not supporting T.38 faxing.

    The customer has a SPA-3102 VoIP adapter (same functionality as SPA-2102) and an HP MFP fax. I have changed the default fax extension in 3CX to the extension number of the SPA-3102 FXS port, which I had created as fax extension in 3CX. This setup seems to be OK, as almost all faxes (incoming and outgoing) are passing successfully (9600 BPS max speed, ECM ON).

    Otherwise, I read in the forum that if your provider is supporting T.38, the only way to receive fax is to use the system fax extension (888) for fax to e-mail. This could be an issue if your provider is using T.38 (and the statement is true).

    Regards
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
Thread Status:
Not open for further replies.