Black Box 2010 - Manual (Page 32)

A double beep sounds and the display
returns to standby. Your handset is now
registered to the Quartet 2010 base unit.
You are Handset 1 and have taken an
incoming call and wish to transfer it to
another Quartet 2010 handset that is
registered to your base unit.
During the call
TRANS Press TRANS . The display shows
and TRANSFER X, where X is the number
of one of the registered handsets.
KEYPAD Enter the number of the handset you
wish to transfer the call to (
2, 3, 4 ).
OK Press OK . The display shows HANDSET 1
and .
Press TALK or return the handset to the
base unit. Your call has been transferred.
The display returns to standby.
If the call is not answered by the
handset you have tried to transfer the
call to after 30 seconds then the original
handset will ring again.