Re: [hylafax-users] Query about multi-modem fax server

[Jason Bachman <jason@bachman.cc>]

John...

1 - What you would get is multiple CO trunks from your phone company. 
 Lets say you want 4 lines in hunt.  You would get 4 lines :555-1234, 
555-1235, 555-1236, and 555-1237.  These lines would be placed into a 
"hunt group" by the phone company with 555-1234 being the 'lead' number. 
 So you will have 4 physical lines coming into your facility to connect 
to the modems.

2 - The miltiport cards will require a driver that allows the linux 
kernel to see the ports on the card as seperate tty ports.  i.e. on my 8 
port digi card, I have ttyD0 - ttyD7 that corrispond to the ports on the 
card.  The tty ports for your card may be differnet depending on the 
manufacture and driver used.  Consult the Serial-HOWTO.  Just as a side 
note,  if the machine that you are going to use has USB ports on it, 
that may be a less costly and more practicle way to put multiple modems 
on your machine.  I have set up a hylafax server with multible USB 
modems and it works great.

3- I have used multitech modems very successfully for a Hylafax Fax 
server.  From what I have read, they are also one of the prefered modem 
types to use.   Most recently I have used the 3COM USR Sportster V.90 
USB modems and they have not given me any trouble when used as a Class 1 
Fax device, running Hylafax 4.1 on RedHat 7.2.

Hope that helps!


Jason

john.d.tullis@ironcitidel.com wrote:

>I intend to set up a multiple modem fax server.
>(a) Server to run RedHat Linux 7.2
>(b) Current RedHat HylaFAX RPM.
>
>>From reviewing the archives, it appears that it is useful to 
>use external modems (because they can be reset w/out needing 
>to reboot the Linux host) attached to a multiport serial 
>card such as those made by www.cyclades.com.
>
>I intend to have a trunk line, set up to "call hunt" by the 
>phone company so that inbound calls can use the same fax 
>number. That is, if I have 8 inbound lines, then when 
>simultaneous inbound calls occur they should "roll over" to 
>the next available line.
>
>Questions:
>(1) If I have a trunk line coming in, how does that split 
>into the multiple lines I would need if I had separate 
>external modems? Obviously, if the trunk line ended in a 
>standard phone jack, that is only a single line 
>(physically). So how does this work? Anyone who has dealt 
>with the physical hooking up of a phone system WITH A SINGLE 
>NUMBER that gets rolled over to separate modems, I would 
>like to hear what is involved here.
>(2) Now, assuming there is no problem there and that the 
>trunk splits into multiple lines, one to each modem, and 
>each modem is then hooked up via a serial cable to a 
>multiport serial card, what are the mechanics of telling 
>HylaFAX that there are several modems on the same serial 
>port? I don't actually know what happens when you add one of 
>these multiport cards to system. Does Linux then see several 
>serial devices instead of a single serial device?
>(3) Finally, I am posting this message in this manner so 
>that I can avoid posting a bunch of "help help help" 
>messages later. I would please like to get suggestions on 
>modems that work with multiport cards. I have read that 
>Multitech 2834ZDX modems work with the Cyclades 8Y0 card. 
>But the posting was not recent. Does anyone have any recent 
>experience where they can say - yes, this model external 
>modem will work with this model multiport serial card 
>because you have done it and have it running - preferably 
>with RedHat 7.x.
>So please post suggestions.
>Regards,
>John Tullis
>John Tullis
>847-867-1032
>
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