BT 2+8 Manual
Installation and maintenance manual
2+8
Contents
Inoducon
Insllation procedures
Subsidia connecon (pi-backing)
Se precauons and switch on
Proamming
Commissioning the system .
Faulng and maintenance
Tones and rinng
Numbering plan
Statuto informaon
Notes
Contents
+
.
Introduction
Central Control Unit
Systemphone
Telephones
Modes of working
1371Issue3(4/91)
Inoduction
1-1
2 8 ccu
Electro-static Precautions (ESP)
Installation procedures
Equipment required
Location for Central Control Unit
Mounting the CCU
TPU
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f
:
.
I
l
The mains supply
I
-
--
/
Extension Systemphones
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�
2-5
Extension telephones
Cabling and wiring
n
n
•
•
Note
•
TPU
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,
O
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•
•
•
TPU
No lines
I
I
Spare
:
Stch SWl, coguraon
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