Installation procedures
2-11
A detailed description of each switch bank and its configuration is given
below.
2.1.13.l
Switch
bank
SWl, configuration
This switch bank consists of eight switches numbered from Sl to
S8
(S7
is spare). The other switches are used as follows:
S 1
and
S2:
Modes of operation
Three modes of operation are available for the
CCU:
-PBX
- Keysystem
-Exclusive line.
Set the mode of operation in accordance with the Mode of operation table
in Figure 2.5.
S3
and
S4:
Forward recall type
These switches are used to send one of four recall options from the 2+8
exchange line ports forward to the parent exchange or host PABX. The
four options are as follows:
- Earth recall
-Time Break recall 95 milliseconds *UK setting
- Time Break recall 250 milliseconds
- Time Break recall 600 milliseconds.
Set
S3
or
S4
in accordance with the Recall table in Figure 2.5. The 95
millisecond setting must be used in the
UK
The remaining options are
provided for use only in other countries.
Note
For direct exchange line connection ensure that the Forward Recall is set
to -TBR 95ms.
SS:
Exchange line equipage
This switch sets the
CCV
to work with either one or two exchange lines.
Its function is to inform the processor that the second line is to be
ignored if it is not connected. Set S5 in accordance with the Exchange
lines table in Figure 2.5.
S6:
Ring Bridge
This switch sets the processor to expect short or long interval ringing
arriving at the exchange line ports. This switch must be set to the short
option in the
UK
The long option is provided only for use in other
countries.
Time period:
- short
-long
S7: SPARE
silent ring period 3.5 seconds (max.)
silent ring period 5.8 seconds (max.).
This switch has no function and is totally ineffective.
TPU
1371Issue3(4/91)
Summary of Contents for 2+8
Page 1: ...Installation and maintenance manual 2 8...
Page 2: ......
Page 36: ...Notes 10 2 Notes 10 3 TPU 1371Issue3 4 91...
Page 37: ...Notes TPU 1371Issue3 4 91 10 4...
