HP J4540, J4680, J4660, J4580, J4550 manual

When the phone rings, your answering machine answers after the number of rings you have set, and then plays your recorded greeting. The device monitors the call during this time, "listening" for fax tones. If incoming fax tones are detected, the device emits fax reception tones and receives the fax; if there are no fax tones, the device stops monitoring the line and your answering machine can record a voice message.

Shared voice/fax line with computer DSL/ADSL modem and answering machine

1	Telephone wall jack
2	Parallel splitter
3	DSL/ADSL filter
4	Phone cord provided with the device connected to the 1-LINE port on
	the back of the device
5	DSL/ADSL modem
6	Computer
7	Answering machine
8	Telephone (optional)

NOTE: You will need to purchase a parallel splitter. A parallel splitter has one RJ-11 port on the front and two RJ-11 ports on the back. Do not use a 2–line phone splitter, a serial splitter, or a parallel splitter which has two RJ-11 ports on the front and a plug on the back.

Set up faxing for the device 89