The function of Interphone is to communication with the master operator and other party lines.
Electrical characteristic :
a. Environmental condition
(1) Ambient temperature : 0ºC ~ 40 ºC
(2) Relative humidity : 35~85%
b. Power supply
DC 12V ± 10% 50 Hz
c. Audio output power
d. Output Impedance
Voice receiver in master and remote must be clearly.
The test configuration is refer to fig. I. 1 and I.2
I. Communication from Master unit to Remote unit.
a. Push a station selector button of station desired (no 1) and the LED indicator should be on
b. Push the change switch for sending the message
c. If the operator in master unit receive the message, there is no button mush be pushed.
d. Record the result of voice receiver and communication ( Good or Not Good ) to attached FUNCTION TEST REPORT.
e. If communication is finish, push reset switch and then the lamp (no 1 ) will be off.
f. Repeat step point a to e for the other line switch depend on amount of talk back slave unit in depot.