At 13:03 -0700 9/10/09, Jonas Lopez wrote:
>> From: Bill Connelly <[email protected]>
>> Subject: Re: FAX from a Mac under OS X 10.5.7?
>> To: [email protected]
>> Date: Wednesday, September 9, 2009, 6:42 PM
>> On Sep 9, 2009, at 1:19 PM, Bruce Johnson wrote:
>> > On Sep 9, 2009, at 9:57 AM, Bill Connelly wrote:
>> >> Guess I need to temporarily bypass the DSL
>> connection, hook up the
>> >> modem, and FAX away using OS Xs pdf to fax
>> capability before/after
>> >> creating a pdf ... thanks.
>> > No you shouldn't need to bypass the DSL connection to
>> do this...the
>> > modem is acting as a regular phone in this instance,
>> not a network adapter.
>> Worked like a charm from my Yikes! OCd 450MHz under Tiger
>> 10.4.11.
>> TextEdit > Print > Fax PDF after creating an Address
>> Book entry.
>I may be a little slow here, but are you connecting the phone line that 
>provides DSL without a filter to the builtin modem or not OR is this some 
>special way the DSL line (the only one I have connected to the computer) is 
>now sending DTMF - confused in need of help.
>JML


FAX using a modem, my G4 has one built in, goes out in the form of quadrature 
modulated (QAM) 1400 Hz carrier on a normal telephone line. Dual tone 
multifrequency (DTMF) is used for dialing the number but not for data 
transmission. 

Both the QAM and the DTMF are well within the voice band (300 to 3000 Hz) of 
plain old telephone (POTS) service and must go through a filter if the same 
telephone line is used for digital subscriber service (DSL). If the filter is 
not used the wide band radio frequencies used for DSL can and will interfere 
with the voice band transmission either FAX or audio.

When I get involved with DSL on a neighbor's or child's home I run a separate 
pair to the DSL modem from the telephone entry point. I then install a filter 
that isolates all other connections to the house. That way one doesn't have to 
worry about all of those filters provided by the phone company. When Qwest 
recently installed DSL here the installer actually did that for me with a 
filter designed for the purpose. But I sure had to ask.


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