21
Version 0.1
Operating manual
2.2
Operation of the SC
2.2.1
Сommutator telephones
The System’s сommutator telephones are manufactured in metal painted steel cas-
ings. The units are wall and panel mounted for installation in dry and humid premises. Use
metal cabinet BLTS2-BO to install units on open deck. Сommutator telephones are applied
for talk-back communication with BTC users.
All сommutator telephones (except portable one) are delivered with telephone
receiver PH-1, portable сommutator telephone – with PH
-3.
It is equipped with a PTT
to
connect to сommutator telephone. The receiver is placed in сommutator telephone holder.
Controls of сommutator telephones are represented in Table 2.
Table 2 – Description of сommutator telephones and telephones controls
Control element
Description
SC
«Call» button
To initiate a call (if power mains
available)
Сommutator telephones and tele-
phones
«Reset call» button
To reset incoming call signal
Сommutator telephones, tele-
phones and relay unit
Inductor handle
To generate energy (during rota-
tion) required to initiate a call and
to power сommutator telephones
and telephones of the System dur-
ing current connection
Сommutator telephones and tele-
phones
Brightness dimmer
To adjust (if power mains availa-
ble) backlight brightness of con-
trols
Сommutator telephones and tele-
phones
Toggle-switch to select user
line
To connect to the selected user line
Сommutator telephones
Telephone receiver PTT
switch
To connect microphone and
speaker of telephone receiver to
user unit
Сommutator telephones and tele-
phones
LED light indicators of сommutator telephones and telephones are represented
in Table 3.
