OT: Hylafax & digital DID

[Bill Akers]

Joe Chasan wrote:
> On Mon, Aug 09, 2004 at 01:32:17PM -0400, Jay R. Ashworth wrote:
> 
>>On Mon, Aug 09, 2004 at 12:37:48PM -0400, Joe Chasan wrote:
>>
>>>what digital to analog converters are you referring to?  from what
>>>i've learned, there are big differences in the way they work - the
>>>multitech's expect, as analog DID, to provide voltage to line,
>>>something around 48V, whereas in digital, the CO provides the voltage.
>>>Is this some specialty converter?
>>>
>>>i know i can plug an single line phone in and make it ring on demand,
>>>but i don't think the DID DTMF would get passed through in such a
>>>situation. 
>>
>>I believe that Bill is referring to boxes like the Adtrans, which can
>>take DTMF DID on a t-span and convert it to CNID so an analog modem can
>>pick it off.
> 
> 
> Adtran doesn't have anything specific for this that i can find -
> remember, i need the DTMF tones passed _after_ off-hook.  the best i
> can think to do with adtran is to put some sort of device before the t-1
> switch and convert it to analog there, but thats no cheap adaptor and also
> assumes advanced knowledge of which channel's the incoming call is coming
> in on which i don't know that I have or who to talk to at telco to even
> ask.  it also complicates things if i wanted dial-in and dial-out on
> it.

The manufacturer/reseller of your phone system should be able to point 
you to a converter that will give the same two wire analog output to a 
telephone or modem as you get at your home telephone. The converter 
should be attached to the digital extension line between the telephone 
system and the modem. Also, a DID number is assigned to a specific 
extension line in your telephone system. Just make sure that is the line 
that your modem(and converter) is attached to. Then you probably will 
have to prefix the outgoing dial with a "9" or something like that but 
incoming calls will ring directly to that line and be picked up by the 
modem.

-- 
William Akers
MGM Industries, Inc.
Hendersonville TN USA