Re: [hylafax-users] Using a serial modem through a converter from ethernet to serial

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

Hi Davide,

>> So, DCD is needed, for properly handling the fax to serial protocol?

DCD is part of the interface between the DTE (PC/Terminal) and DCE (modem).
Many applications use it to indicate when a connection between two modems
has been terminated.  I suspect that the behaviour of HylaFAX is
configurable in this area but I don't know (I'm sure someone from the list
will comment on this).  The behaviour of your modem may be configurable
(lookup AT&C commands in your modems AT manual). 

>> If you can suggest a multiport fax card that is supported by VMWARE ESX
let me know...

Your customer is missing the point.... HylaFAX is undertaking much of the
low level timing and when you virtualised the interface to the fax modem
then NO fax card can be guaranteed to work.  It's possible to get virtual
systems to work some of the time.... But these systems do not meet any
reasonable level of reliability... If spending money is more important than
sending/receiving fax's then I will happily take their money (without any
guarantee that what you purchase is fit for use as a fax card !).

Regards

ANDREW RINALDI
Mainpine Limited Support
USA +1 503 822 9944 | Asia/Europe +44 1225 869439  
andrew.rinaldi@xxxxxxxxxxxx | www.mainpine.com

-----Original Message-----
From: Davide Pagnin [mailto:pagnin@xxxxxxxxxxxxxx] 
Sent: 01 February 2007 19:04
To: andrew.rinaldi@xxxxxxxxxxxx
Cc: hylafax-users@xxxxxxxxxxx
Subject: Re: [hylafax-users] Using a serial modem through a converter from
ethernet to serial

	Hi Andrew

First of all, thanks for the replay!

andrew rinaldi ha scritto:
> Hi Davide,
> 
> I suspect that this will never work reliably.... Firstly, running HylaFAX
on
> a virtual server removes the tight timing and control needed between the
> protocol engine and the fax hardware, and secondly, the Ethernet to serial
> converter does the same thing but with even less control of the timing.

To be honest, the customer knows that this can be a stop issue:
"he only want to make a try..."

> 
> With respect to your question about modem control signals then this will
be
> an issue for the serial driver.... most apps can live without RI but DCD
is
> often an issue if it's missing.

So, DCD is needed, for properly handling the fax to serial protocol?
(I'm wondering how faxsetup managed to complete without problem, perhaps 
is test only some AT commands and thus it does need all the things)

> 
> Ever thought of a multiport fax card ?  It just plugs in and works.....

If you can suggest a multiport fax card that is supported by VMWARE ESX 
let me know...

I know that I can setup a physical machine with linux and a multiport 
fax card (and I have already done this kind of setup for many of our 
customer), buy this particular customer want to use "virtual servers" 
and thus he has to live with problems that this kind of solution has...


> 
> Regards
> 
> ANDREW RINALDI
> Mainpine Limited Support
> USA +1 503 822 9944 | Asia/Europe +44 1225 869439  
> andrew.rinaldi@xxxxxxxxxxxx | www.mainpine.com
> 


Regards

Davide Pagnin



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