Brother MFC-3100C Owner's Manual page 172

Remote Commands
Change Fax Forwarding Setting
Press 9 5
then to Turn Fax Forwarding OFF press 1.
Turn Fax Forwarding ON press 2.
Program Fax Forward Number
press 4. Enter the new number of
the remote fax machine where you
want your fax message forwarded
and then press # #.
Turn Fax Storage on press 6.
Turn Fax Storage off press 7.
161
Retrieve Fax
Press 9 6
then to Retrieve all faxes press 2, then enter
the number of remote fax machine,
and then # #. After the beep, hang
up and wait.
Erase all fax messages press 3.
Check the Receiving Status
Press 9 7 1.
1 long beep - Fax message(s)
3 short beeps - no messages
2 3