17
Version 0.1
Operating manual
Figure 6 – Connections of external signaling units
to telephones (сommutator telephones)
All сommutator telephones have LED light indicator of power status when power
is supplied from the power source.
All сommutator telephones have controls backlight which switches on automati-
cally once the power is supplied from external source.
Use сommutator telephones on open deck only mounted in cabinet BLTS2-BO.
2.1.2
Telephone units
Telephones PH2-1 type provide for pair communication (in combination сommu-
tator telephone-telephone or telephone-telephone) in BTC network (two-wire line or three-
wire line).
The System includes two types of telephones:
‒ wall mounted PH2-1-W;
‒ panel mounted PH2-1-P.
All telephones are equipped with telephone receiver for two-way communication
with other users.
External communication devices (headsets and intercom helmets) may be con-
nected to all telephones directly or using socket PB-HS type. Connections of external com-
munication devices are shown in Figure 5.
