Re: [hylafax-users] Hylafax+ With E1 card possible ?

["Andrew Rinaldi" <andrew.rinaldi@xxxxxxxxxxxx>]

Hi Steve,

Most of the chipsets used within the V.29/V.17 fax machines are no longer
available which is why I expect to see an upsurge in new V.34 fax machines,
with more vendors moving to a V.34 only strategy.  I also find it
interesting that the latest Davidson report states that in 2005 83.9% of fax
boards sold were V.34 capable.

I understand from one of the T.38 contributors that a number of people
believed that V.34 was unlikely to work reliably over T.38 which is why they
left V.34 'for further study' in the 2002 specification.  I've also had a
conversation with one of the IP fax server vendors who said that the Cisco
V.34 solution was not 'robust' (although to be fair they also reported
constant change with the Cisco V.17 firmware so maybe it's not V.34
specific).  One final point, V.34 is a very litigious area and this might
discourage T.38 vendors from implementing V.34 in the gateways.

Regards

Andrew Rinaldi
Mainpine Developer Support
USA +1 503 822 9944 | UK +44 8458 909438
andrew.rinaldi@xxxxxxxxxxxx | www.mainpine.com

-----Original Message-----
From: hylafax-users-bounce@xxxxxxxxxxx
[mailto:hylafax-users-bounce@xxxxxxxxxxx] On Behalf Of Steve Underwood
Sent: 17 December 2007 02:31
To: andrew.rinaldi@xxxxxxxxxxxx
Cc: hylafax-users@xxxxxxxxxxx
Subject: Re: [hylafax-users] Hylafax+ With E1 card possible ?

Andrew Rinaldi wrote:
> Hi Steve,
>
> I see logs from many different high volumes systems.  Three that I 
> monitor regularly are US based 'service providers' that offer 'internet
fax'
> services to the general public.  It's these results that yield the 40% 
> V.34 figure that I quoted (up from 32% at the end of 2005)
>
> I also see logs from many other high volume vendors who's user base is 
> more targeted as you suggest.... many of our medical customers for 
> instance deploy V.34 machines to their end users when they install fax
servers.
>
> You can also expect to see many new V.34 fax machines because both LSI
> (Agere) and SiLabs have released new V.34 fax machine chipsets in the 
> last eighteen months.
>   
There have been many V.17 chipsets available since the early 90's, yet a
huge number of V.29 only thermal paper FAX machines are still shipped. :-)

In debugging my T.38 code over the last few months, against as many gateways
as I can find, I have not seen a single T.38 gateway that appears to offer
V.34 operation. Mine certainly doesn't, as a free V.34 is not possible. I
believe at least the Cisco boxes support V.34 over T.38, but all the ones I
have tested against must have it disabled.

Steve


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