[VoiceOps] Grandstream ATAs for Faxing

[David Wessell]

Oh god. We've had horrid results with the Faxback platform. We've used it
with two resellers and it's been consistent downtime. That could be the
resellers and not the platform itself.

I agree on T.38 though. We disable it by default and use G711 over
Mediatrix or Adtran ATA's with pretty good results.

dw

On Wed, Sep 10, 2014 at 8:32 AM, Colton Conor <colton.conor at gmail.com>
wrote:

> For faxing, HTTPS faxing using Audiocodes adapters with Faxback technology
> has been the only reliable solution for us. Not sure about credit cards.
> T38 seems to be a joke.
>
> On Tue, Sep 9, 2014 at 9:39 AM, Jamey <jamesleo at socket.net> wrote:
>
>> Hello,
>> We having been utilizing Grandstream ATAs (HT70X and GXW400X) as analog
>> hand offs with our Hosted Services built on the Broadworks platform and
>> Sansay's SBC.  We've had regular trouble when using them with fax and
>> credit card machines.  We support t38 but have often gone to g711
>> pass-through.  Echo cancellation is disabled.  We've tested them with the
>> various jitter buffer lengths, Rx/Tx setting adjustments and various
>> impedance values.  The results seem very inconsistent.  This is site to
>> site as well as inconsistent results at the same site.  The faxing/credit
>> card transmissions will work for a period of time and then begin failing
>> without any changes.
>>
>> We are a CLEC who control the QoS from device out to the PSTN.  We've
>> found that replacing the ATA with a Adtran TA90X usually corrects the
>> issues but this is not a cost effective solution.
>>
>> Anyone have similar experiences with Grandstream ATAs?  Anyone have
>> reliable VoIP faxing with their ATAs? If anyone has been successful
>> integrating the Grandstreams, I would be interested in knowing what config
>> changes you've made from their default.  Which models you've used with
>> which firmware?
>>
>> Anyone have other ATA's that seem to work well for faxing and credit card
>> machines?  We'd like to keep our offering to as few manufacturers as
>> possible that can offer 2, 4, 8+ FXS ports.
>>
>> Thanks for any and all recommendations.
>>
>> Jamey
>> Socket Telecom
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>
>
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