Understanding fax LINE & EXT connections

September 26, 2010 at 04:13:22
Specs: Windows XP
On the back panel of a PC with a fax modem card there are two telephone receptacles: LINE and EXT. Currently I have an ADSL telephone line, with an intervening converter/router between the micro-filterd ADSL signal and the home phone and PC-fax. It works fine as follows: Converter-out to PCfax-LINE, PCfax-EXT to PHONE-in. Now I bought a separate fax machine but I would like to keep my old PC-fax operable -- as a backup. My questions are:

1. Electrically, are the LINE and EXT connectors of fax machines/cards simply in parallel? (If so, they may be interchanged w/o any noticable effect.)

2. What's going to happen if I chain the two faxes: Converter-out to PCfax-LINE, PCfax-EXT to FAX-LINE, FAX-EXT to PHONE-in?

3. If (2) is not a good idea, how about splitting Router-out into 2 parallel lines, one for the PC-fax and phone (as previously), the other solely for the new fax machine (in which case FAX-EXT will remain vacant?)

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September 26, 2010 at 14:04:54
Depends. On some if not most they are the same connection. Put a handset into the extra one to test. Switch them and try again. Does it work?

One would pick up before the other. You could only select by number of rings.

What you need is another line for that extra fax.

Why did it take me over a year to phone in a problem to ATT?

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