BT Fax User Manual page 30

You can set your PaperJet 300 to call another fax
machine and receive a document from it. This is
often known as Faxback. You may need to know the
other machine's password in order to retrieve the
document.
Press
Press
If required, enter the other machine's
password.
Press
Display shows
Enter the number for the other machine.
Press
document is received. Display then returns
to standby.
To cancel polling, press
28
until the display shows
.
.
. The number is dialled and the
.
You can start a phone conversation after sending or
receiving a fax.
While the fax is being sent:
Lift the handset. When the fax has finished,
the other machine will beep to let the other
person know you want to talk.
When the person at the other end responds,
you can talk.
If you lift the handset and replace it, the voice request
is cancelled.
If the other person does not pick up their handset
while the beeps are sounding – or if the other fax
does not have a voice request function - the line will
be disconnected.