Same. Healthcare facilities won't let go.  But client types form my observation.  Most of our clients have at least one physical fax device, with some having more than 5 in one office, generally for business units.  And many of those will also have an efax solution available as well.

On 4/19/2024 12:42 PM, Shawn L via VoiceOps wrote:
More than we'd like to.  Medical institutions and law firms seem to be the two biggest ones.  We have one hospital that has multiple PRIs just devoted to faxing -- thankfully that is TDM, so in general it just works.  Otherwise, for those that use SIP there doesn't seem to ever be a "just do X, and it'll work".  There's always some trial and error with the individual site, the MTA / ATA model, the fax machines involved, etc.

The worst one I have seen was during the height of COVID. A new testing lab was opened and they could not be convinced that sending 1500 page faxes was fraught with potential problems.  Regardless if there was an ATA involved or not.  In the end, we declined to provide them service because we knew nothing good would come of it.

On Fri, Apr 19, 2024 at 12:14 PM Jawaid Bazyar via VoiceOps <[email protected]> wrote:

    What are everyone's thoughts on trying to do fax this way, versus,
    an E-Fax solution that supports receiving as well as sending ?

    How many legit physical fax machines are you all supporting out there?

    Jawaid


    On Fri, Apr 19, 2024 at 12:13 PM Mark Wiater via VoiceOps
    <[email protected]> wrote:

        I can echo, that the ATA matters. But so does the
        configuration of the faxing device (14400 Baud and ECM on),
        the switches that the calls go through, the configuation of
        the network equipment and the quality of the internet
        connection, even the cable type connecting the ATA and the fax
        device sometimes.

        I have excellent faxing history with Cisco ATA-191's using
        G.711 (but not T.38 with the softswitch I use predominantly)
        and a client network with well configured QOS enabled firewalls.

        It's not logical to me, but I've even seen instances where
        using a 2 conductor cable from fax to ata improved
        communication over a 4 conductor cable.

        Nathan and Ross covered other great points as well.

        Mark

        On 4/18/2024 10:22 PM, KARIM MEKKAOUI via VoiceOps wrote:

        Hi VOIPOPS Community

        Do you know about any fax over internet solution that works?
        We tried multiple ATA and multiple ATA configurations,
        sometime it works sometimes not.

        Also, do you know about any eFax solution provider that works
        good.

        Thanks in advance for your help.

        KARIM

        MEKTEL INC.


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