To get what you're after you'd probably have to use the main computer as a WiFi AP serving the other two machines to share access to the fax-modem; and even then it depends upon the nature of the fax-modem.
That would almost certainly mean buying additional AP hardware, and is perhaps also somewhat beyond the average computer users skills to set up properly.
If you were to use something like a Bluetooth network with a BT fax-modem perhaps you could do it that way - yet by far the easiest solution is to fit additional dial up fax-modems in the two additional workstations
My Computer
At a glance
W7 x64Intel Q9300 2.5Ghz Quad LGA775 (Would like Q9...4Gb OCZ Gold 1,333MhzPalit HD4850 O/C Sonic 512Mb DDR3, Dual DViD's
Computer Manufacturer/Model Number
Custom built machine
OS
W7 x64
CPU
Intel Q9300 2.5Ghz Quad LGA775 (Would like Q9650)
Motherboard
Gigabyte GA-EP45T-UD3R (F6 Bios)
Memory
4Gb OCZ Gold 1,333Mhz
Graphics Card(s)
Palit HD4850 O/C Sonic 512Mb DDR3, Dual DViD's
Sound Card
Azalia to twin Samson 50w Studio Monitors
Monitor(s) Displays
Twin Dell (E-IPS) U2311H 23.6" Screens
Screen Resolution
1920 x 1080 @ 60Hz
Hard Drives
Crucial M4 SSD, archives on twin Western Digital Caviar Black WD2002FAEX, 2TB, 7200rpm HDD's, Samsung Ritemaster CD/DVD Burner...
PSU
OCZ 600w
Case
Lian-Li PC8 acoustifoamed' aluminium tower
Cooling
Scythe 140mm Zipang
Keyboard
Cherry PS/2 custom model
Mouse
Lenovo USB laser "Thinkpad" Mouse
Internet Speed
ADSL2+ @14Mbps downstream & Cat6 Gigabit Ethernet
Antivirus
NOD32
Browser
Opera
Other Info
Silicon Dust HD Homerun Dual FTA (Ethernet) TV Tuners, Dray Tek Vigor 2850Vn router and 8x HP Gigabit Switch. Lian-Li CR26 Card Reader, Canon MF4430 iSensys laser printer/scanner.
Thanks for prompt reply, I was told there is a software solution to this....if that is the case...which software, I don't mind paying for it if it is economical. Tia
If I had to do what you're looking into I seriously think that I'd investigate buying three BT PCiE cards and adding one to each machine, and use them in conjunction with a suitable BT Fax-Modem which could be made accessible to all of them...
However it'd be like using fairly up to date technology to enable yesteryear technology, I personally have never needed to use fax in many years now
My Computer
At a glance
W7 x64Intel Q9300 2.5Ghz Quad LGA775 (Would like Q9...4Gb OCZ Gold 1,333MhzPalit HD4850 O/C Sonic 512Mb DDR3, Dual DViD's
Computer Manufacturer/Model Number
Custom built machine
OS
W7 x64
CPU
Intel Q9300 2.5Ghz Quad LGA775 (Would like Q9650)
Motherboard
Gigabyte GA-EP45T-UD3R (F6 Bios)
Memory
4Gb OCZ Gold 1,333Mhz
Graphics Card(s)
Palit HD4850 O/C Sonic 512Mb DDR3, Dual DViD's
Sound Card
Azalia to twin Samson 50w Studio Monitors
Monitor(s) Displays
Twin Dell (E-IPS) U2311H 23.6" Screens
Screen Resolution
1920 x 1080 @ 60Hz
Hard Drives
Crucial M4 SSD, archives on twin Western Digital Caviar Black WD2002FAEX, 2TB, 7200rpm HDD's, Samsung Ritemaster CD/DVD Burner...
PSU
OCZ 600w
Case
Lian-Li PC8 acoustifoamed' aluminium tower
Cooling
Scythe 140mm Zipang
Keyboard
Cherry PS/2 custom model
Mouse
Lenovo USB laser "Thinkpad" Mouse
Internet Speed
ADSL2+ @14Mbps downstream & Cat6 Gigabit Ethernet
Antivirus
NOD32
Browser
Opera
Other Info
Silicon Dust HD Homerun Dual FTA (Ethernet) TV Tuners, Dray Tek Vigor 2850Vn router and 8x HP Gigabit Switch. Lian-Li CR26 Card Reader, Canon MF4430 iSensys laser printer/scanner.
First-I'm not using my W7 box for faxing so I can't test any of these suggestions.
On my XP machine that I fax from - faxing is a printer choice.
Try this: Go to Devices and Printers, right click on the fax modem, select sharing if it is listed. If so from one of the other computers try adding a network printer and see if the fax modem is offered as a choice.
My Computer
At a glance
7rcPhenom II 9408GB DDR2 800 5-5-5-18Asus eah4870 dk 1gb
Thanks, I got "sharing is not supported for this type of printer"....I google for some solution and it seems XP allow fax modem sharing but Windows 7 disabled it.