Samsung SF 4700 - Manual (Page 165)

8.2 Appendix
Situation 2
You connected the SF-4700 to a wall jack with a phone line for
fax and voice calls (a shared line).
Connect any other devices you have to this phone line. To connect the
other devices you have to the same wall jack as the product, go to
Appendix “Connecting Other Devices, Overview” on page 8.3.
If you have another wall jack for this phone line, you can connect some
of the devices to that wall jack. However, if you have an answering
machine or computer with voicemail, make sure to connect it to the
same wall jack as the SF-4700.
Special Situations
You have two phone lines coming into one wall jack.
When you connected the SF-4700, you should have plugged it into a
phone unit splitter connected to the wall jack. Proceed as if that side of
the phone unit splitter is a phone line for fax calls only (a dedicated
line). See “Situation 1” on page 8.1.
You have one phone line with two phone numbers and
distinctive ring service.
Use the same guidelines in “Situation 2” above for connecting other
devices. You can change settings for distinctive ring later.