– 10 –
6
6
OPERATIONS
Calling and receiving
To call a TB-SE sub, the other master or audio door station pick up
handset and depress a station-select button. When called by
tremolo tone, pick up and depress the LED-lit select button. LED
remains on while in communication. Communicating TC-M is
notified of a call with a lit LED only. The audible call tone will
resume when the handset is hung up.
Receiving a call from audio IE/IF door station
When the door station places a call with call button, a tremolo tone
is activated on the TC-M, which stays on approx. 40 seconds. The
master replies by selecting the station button that is lit. At the door
station, when selected, a pretone is heard, unless it is muted at the
TB-AD1, 10 adaptor.
“Transfer” allows two TB-SE subs to communicate with each other
When a master receives a call from sub A, requesting transfer of
call, TC-M leaves sub A waiting, pressing a sub B select button.
When sub B picks up the call (sub A hears a busy tone), TC-M
depresses Transfer switch.
TC-M then reselects waiting sub A with red LED on. Three parties
are on the line, and TC-M may hang up.
Door-to-master or master-to-master calls are not transferrable.
If transfer LED is lit when a transfer is not being made, it can be
cleared by pressing “transfer” switch.
Red LED
Station-select button for
sub, door or master
Transfer switch & LED
Do not press more than one buttons,
when calling.
Power on LED
In-use LED
Indicates TC-M master is not put
in standby. Make sure handset is
properly placed.
Speaker for call-in tone
Transfer switch & LED
Receiver (upper) & call tone
volume controls (3 levels)
Attach the directory &
cover from left side to
place.
Station-select button
Call in LED
Also indicates waiting for
transfer of call
Single TC-M system
TC-(10, 20)M master communicates with 10 or
20 TB-SE subs. TC-20G or TC-40G add-on
communicates with 20 to 40 additional subs.
TC-M single-master system
IF-DA
TB-AD1
OFF
ON
