Samsung SF-530 Series - Manual (Page 69)

3.12
Stand-alone Fax
Voice Request
If you are sending or receiving a document and need to speak to the
other person during the same phone call, use Voice Request to alert the
person at the remote site. You can also respond to a Voice Request made
by the person at the remote end.
Sending a Voice Request
1. Press OHD/V.Req while a document is being sent or received. Voice
Request signal is stored and then sent to the remote fax machine
after the document has been sent or received.
2. When the phone rings, pick up the handset and answer it.
You can cancel a Voice Request by pressing OHD/V.Req again while
you are sending or receiving a document.
Answering a Voice Request
When the phone rings after sending or receiving a fax, pick up the
handset and answer it.
If you do not answer the Voice Request, the machine prints out the
number that made the Voice Request, as well as the time and date that
the request was made.