I looked at this a while back but I was unable to implement due to budgetary 
constraints. I'll give you what I recall -
- It operates in a store and forward configuration i.e. the ATA receives the 
entire fax then transmits it via HTTPS. I am unsure of size limitations but I 
would imagine it is memory constrained to some upper limit.
- The ATA receives updates from the fax server and then essentially transmits a 
status fax to the sending machine. They recommended disabling transmission 
reports on the fax machine otherwise it would print a success page every time.
- The terminating end is a third party fax server. There one or two 
alternatives that were available, including a white label cloud based solution 
but I don’t remember the manufacturers. I also inquired about the possibility 
of releasing the interface (I am sure it is a  simple REST type interface) for 
integration into an open source solution like Hylafax but never got anywhere 
with that.
- I don’t think there is anything else commercial like this, at least not as of 
two years ago.

I did a roll your own version as a proof of concept using two Asterisk boxes 
and an ATA. Essentially, the ATA registered to server A. The dialplan directed 
any valid DN to a fax conversation that converted the file to a TIF, named the 
file based on sending/receiving DN and date/time, and did an HTTP PUT to server 
B. Server B had a cron job that looked for files and transmitted them based on 
the sending and receiving parties from the filename, again using Asterisk and 
the Asterisk fax module. It worked really well considering the amount of time 
that I put into it. I was able to transmit over 50 pages over a spotty 3G 
connection and the public Internet, I am sure a commercial product would have 
similar success, with the caveat of any limitations due to memory, etc.

Rob

-----Original Message-----
From: VoiceOps [mailto:[email protected]] On Behalf Of Jay Hennigan
Sent: Monday, March 16, 2015 7:46 PM
To: VoiceOps
Subject: [VoiceOps] Audiocodes MP202B fax-to-https ATA

We've recently become aware of the Audiocodes MP-202B ATA that sits at a 
customer premise, captures transmission from a fax machine, and sends it via 
HTTPS to a remote server. We are considering this as a solution to some 
specific problematic fax-over-IP situations.

I have a few concerns, and am wondering if anyone on the list has used these 
units and what your experience is with them, good, bad, or ugly.
Specifically:

* Does the ATA receive the entire fax and then send it over HTTPS? If so, is 
there a limitation on the number of pages or size of data?

* Does the sending fax get an accurate report of failure if the actual 
destination fax is unreachable (busy, no answer, wrong number, out of paper, 
etc.) once the transmission is accepted by the local Audiocodes box, or do they 
get an "OK" report in error?

* What goes on the other end? Is there a bigger version Audiocodes box that 
connects to a PRI or other TDM connection to the PSTN?

* Are there competing products that we should be considering?

The Audiocodes website is somewhat lacking in terms of technical detail and I 
have a call into them but wanted to get some feedback from the community about 
this and similar solutions.


--
Jay Hennigan - CCIE #7880 - Network Engineering - [email protected] Impulse 
Internet Service  -  http://www.impulse.net/ Your local telephone and internet 
company - 805 884-6323 - WB6RDV _______________________________________________
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