Technical Precautions - Aiphone TB-20M Installation & Operation Manual

TB-M places a buzzer-activating call to a TB-SE sub
Buzzer sounds continuously at TB-SE sub, in
addition to ordinary tremolo. Pick up on the
TB-SE station, that the buzzer is connected to.
Adjusting receive and call tone volume
Upper control adjusts handset receiver volume,
when TB-M does not hear a TB-SE sub clearly.
Tone control adjusts ringing tremolo, 3 levels.
■ TB-M dual-master system
Two masters call and communicate with each assigned select
button. Transfer of a sub's call to another on the other master is not
possible.
A call from TB-SE subs that are connected to two masters activates
tremolo tone at both masters. When the controlling TB-M is busy,
the other TB-M may pick up. In this case, the sub hears both
tremolo and busy tones.
★ Dual-master has an operation that, when TB-M1 places a call to
either TB-M2 or a common TB-SE that is already in
communication, the talk line is connected among 3 parties.
It reduces communication volume. One party should hang up to
restore normal volume.
■ TB-SE sub operation
rffc* To call TB-M master, simply pick up and it rings TB-M with tremolo
|| I tone, which continues ringing until the call is answered, intermittent
11: | tone means the master is occupied. Hang up or continue to hold.
I jjp— Speaker When called by tremolo tone, simply pick up.
TECHNICAL PRECAUTIONS
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r The power switch is located on back panel of TB-M console, which should be placed ON, except for
special occasions. If the system malfunctions, turn off and on TB-M master, by which the system
may reset itself. Possible causes are; power supply is unplugged, connecting wires are loosened or
shorted. Do not attempt to open TB-M equipment nor change wiring. Ask qualified personnel.
:o place handset in cradle properly. If not, TB-M master or
★ The TB-M is rated to operate at temperatures between 0°C - +40°C (32°F - 104°F).
★ Clean the TB-M equipment with a soft cloth dampened with neutral household cleanser. Never use
any abrasive cleaner or cloth.