[VoiceOps] T38 over Sip

[Sorensen, Marty]

Weve had some good luck with fax machines (newer models) that state that they are voip compatible.  The model was a Lexmark X5650...I believe it was under $200. We also used a Quintum ATA instead of the crappy Cisco ones.

-----Original Message-----
From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of Scott Berkman
Sent: Friday, August 28, 2009 8:53 AM
To: 'Kevork Belian'; 'Junaid Hattia'; 'Alex Balashov'
Cc: voiceops at voiceops.org
Subject: Re: [VoiceOps] T38 over Sip

This isn't a great work around because it's almost impossible to tell your
customers "Oh just have the other side turn off ECM on their fax machine and
force the transmit speed to the lowest possible setting".  If they even
understand what that means, which they won't, they probably don't have
access/permissions to make the settings change on the machine.

Every time I have fax issues with a customer I am tempted to tell them just
how well Email works over IP :).  I know, faxes are legal documents and
emails are not (in GA anyway), but that just doesn't make any sense to me
logically.

	-Scott

-----Original Message-----
From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org]
On Behalf Of Kevork Belian
Sent: Friday, August 28, 2009 10:20 AM
To: Junaid Hattia; Alex Balashov
Cc: voiceops at voiceops.org
Subject: Re: [VoiceOps] T38 over Sip

Disable ECM on Cisco gear (AS5400 and the exit gateway of PGW). 
You can disable ECM on the fax machine also.


-----Original Message-----
From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org]
On Behalf Of Junaid Hattia
Sent: Friday, August 28, 2009 3:03 PM
To: Alex Balashov
Cc: voiceops at voiceops.org
Subject: Re: [VoiceOps] T38 over Sip

Attached is a call flow....

The basic prolem is that a fax call cannot be completed...


On 2009/08/28 1:29 PM, "Alex Balashov" <abalashov at evaristesys.com> wrote:

> There are many things that could be wrong there.  Problem description 
> is not sufficient.
> 
> Junaid Hattia wrote:
> 
>> Howdy
>> 
>> Ok so im trying to t38 over sip working with no luck
>> 
>> My test lab is as follows:
>> 
>> Pangea box connecting to a AS5400 via PRI, which then traverses an 
>> Acme Session director, broadsoft and then exits via PGW(SS7)
>> 
>> The sniffer capture says ³failure to train²
>> 
>> 
>> Any ideas?
>> 
>> --
>>  junaid
>> 
>> 
>> 
>> 
>> 
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