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Figure 2.5
DIL switches
51 0 D D D
Exchange lines
One exchange line only
Both exchange lines equipped
No lines
Note
The TBR duration options of 250ms or 600ms are only provided for
Continental installations.
Note
Ring Bridge is set to Short interval ring duration. The Long duration
option is provided only for Continental installations where it may be
needed.
TPU 1371Issue 3(4/91)
SW1
No lines
Extension
20
DODD DODD DDDDDDDD DDDDDDDD
Spare
Recall
Exchange line
equipage
Mode of operation
Sl
PABX
Down
Keysystem
Down
Exclusive line
Up
No exchange lines connected
Exchange line(s) connected
SW2
Extension equipage
Extensions
27
20
up =equipped
down= unequipped
S2
Down
Up
Down
SS
Up
Down
SB
Up
Down
Installation procedures
SW3
Ca llbarring Line 1
Callbarring Line 2
Extensions
27
20
up = barr
down =no barr
Note: Extension 20 cannot be barred
Recall
ELR
Up
TBR 600ms
Down
TBR 250ms
Up
TBR95mms*
Down
Ring bridge
Short*
Long
UK setting
*
SW4
Extensions
27
up = barr
down =no barr
S3
S4
Up
Up
Down
Down
S6
Down
Up
2-10
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