t.38

  1. Fax device does not send/receive with HT802

    Hello, the constellation is this: 3cx Server (Self hosted - cloud) <-- SBC <-- Grandstream HT802 <-- fax device (Brother 8360p) troubles: Sending and receiving with the fax device is not possible to other fax devices Sending and receiving with the fax device is possible to other devices using...
    • Chili.
    • Thread
    • can not fax with g711 fax fax failure fax to fax g711 codec ht802 t.38
    • Replies: 5
    • Forum: Phone System / PBX
  2. Connexium Partner

    Solved Does 3cx officially supports ECM for inbound faxes?

    Hello, I know how people cringe when someone mentions faxing and VOIP on this forum. There is also a million thread about it. But there is one question I cannot seem to find the official answer to, either on this forum or with Google. (No, i'm not trying Bing!) Q: Does 3CX officially supports...

  3. Partial faxes with G711 and Fax Failure with T.38

    I have been working on this issue for a long time. About a month now. I have created a wireshark captures for the many many tests I have performed. Context: We have recently pulled a 3CX from a hosted cloud environment, to an on prim environment. We experienced a loss of fax capability...

  4. Partial Faxes with G711 and Fax failure with T.38

    I have been working on this issue for a long time. About a month now. I have created a wireshark captures for the many many tests I have performed. Context: We have recently pulled a 3CX from a hosted cloud environment, to an on prim environment. We experienced a loss of fax capability. Enabled...

  5. SIP RE-INVITE - T.38 Issues

    I'm using t38fax.com to terminate faxes (using T.38 not G.711) using an HT812 (Grandstream), SPA112 (Cisco) and FSP 2.4 (Software T.38 Fax integration for Microsoft Fax Services). They all work perfectly when connecting to their server (sip.t38fax.com) directly. However if I put 3cx in the mix...

  6. Inbound T.38 Fax consistently failing

    Hello, I would like to receive faxes on a single DID and have them sent by email. The integrated "3CX Fax Server" ist designed to do just this. It's configured like this(some data obscured): There's an inbound rule auto created, sending all calls on that DID to 888, at all times of day. When...
  7. Michael Menor

    Solved Fax Server Issues - 488 Not Acceptable Here

    Hi everyone, We're pretty new to the 3CX Fax Server feature and we can't seem to get this (simple) feature to work. All we need is for Fax to Email to work. I opened up a support case with 3CX and they state that the trunk provider will need to support T.38 on their end. I've confirmed with two...
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