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Branch1
Total= 150m (Acceptable)
Station
Power and Termination
Unit (PTU) Terminations
12
3
0
Lla
Llb
.
Lines in
Power Supply Plug- Pack
Exchange lines
If cabled this way, the system would not function properly. In this case,
the PTU should have been located as close as possible to the group of
three keystations to create an acceptable overall length.
Station
Station
PTU
Total Bus Length = 500m
Example Of Unacceptable Cabling Scheme
[IL201
Terminate the bus on the PTB-E in the PTU. Refer to
Power and Termination Unit Terminations.
J2
Bm2 Bm2
Background
Powerfail
telephone Music Source telephone
Power and Termination Unit Terminations
To connect the power supply plug-pack to the Power andTermination
Unit:
.
Terminate on the input screw terminals 53 1 and 53 2.
As this is an AC output, it is not polarity-dependent.
NOTE:
To terminate incoming exchange lines:
.
Terminate on the PTU on the input screw terminals 52 1 and 2
(line I), and 52 3 and 4 (line 2).
Branch 2
Total =1140m (Not acceptable)
Station
Bla
Blb
White Blue Orange Green Black Red
System Bus
Illustration 21 -
To Plug Pack
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