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Installation procedures
A detailed description of each switch bank and its configuration is given
below.
Switch bank SWl, configuration
2.1.13.l
This switch bank consists of eight switches numbered from Sl to S8 (S7
is spare). The other switches are used as follows:
S 1
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
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.
For direct exchange line connection ensure that the Forward Recall is set
Note
to -TBR 95ms.
SS:
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:
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
This switch has no function and is totally ineffective.
2- 1 1
and
Modes of operation
S2:
and
Forward recall type
S4:
Exchange line equipage
Ring Bridge
silent ring period 3.5 seconds (max.)
silent ring period 5.8 seconds (max.).
1371Issue3(4/91)
TPU
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