Installation procedt.i.
_
2.1.8
Connecting the extensions
For information the ringer equivalence number for 2+8 extension ports
is
4.
IJU 2/lA master jacks are required, one per extension. All extensions
irrespective of whether they are using an approved telephone or
System phone are 6-wire connected at the master jack.
Note
Only five wires are connected at the CCU; the sixth (pin
3)
is spare, and
the wire must be neatly laid back away from the IDCs.
Extensions are numbered 20 to 27. Extensions must be connected in one
continuous block starting at 20, and there must be no gaps in the
numbering sequence that will leave an extension without a telephone.
Run 6-wire cable from the CCU to each extension telephone location.
Pass the cable through the cable entry hole in the CCU and terminate the
extension wiring in accordance with the following table.
Table
2.1 CCU
to Master Jack Extension wiring
2.1.8.1
CCU
Extension
IDC
Master jack
IDC
1
Green/White
1
2
Blue/White
2
Orange/White
3
Not used
4
White/Orange
4
5
White/Blue
5
6
White/Green
6
Connecting parallel extensions
Additional IJUs can be connected to the master IJU of any extension
port using either serial or spur cabling.
Any approved secondary IJUs or socket doublers can be used for
connecting additional extensions to the master IJU, providing the
cabling wiring procedure and maximum REN value are the same as
paragraphs 2.1.7 and 2.1.8.
Note
System phones can not be paralleled with other System phones, 2-wire
telephones or sockets which are part of ancillary apparatus (refer to
paragraph 2.1.15 and Section 10.1,
Statutory information).
TPU
1371Issue3(4/91)
2-6
Summary of Contents for 2+8
Page 1: ...Installation and maintenance manual 2 8...
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Page 36: ...Notes 10 2 Notes 10 3 TPU 1371Issue3 4 91...
Page 37: ...Notes TPU 1371Issue3 4 91 10 4...