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SCP-FCS717-022-03H
Composite Clock
When required for digital services, connect the composite clock as shown in
composite clock terminations and functions). You can cascade the composite clock to other PG-Flex shelves.
When cascading the composite clock to other PG-Flex shelves, terminate only on the last shelf in the cascade.
If the composite clock is connected, it must be terminated by connecting a jumper from
CC1_TIP to CC1_TERM wire-wrap pins, and from CC2_TIP to CC2_TERM wire-wrap pins
on the last shelf in the cascade.
1
Connect the composite clock leads from the primary master clock source in the CO to CC1_TIP and
CC1_RING wire-wrap pins on the backplane.
2
Connect the composite clock leads from the secondary master clock source in the CO to CC2_TIP and
CC2_RING wire-wrap pins on the backplane.
3
When cascading the composite clock to other PG-Flex shelves, install a jumper from CC1_TERM to
CC1_TIP and from CC2_TERM to CC2_TIP only on the last shelf in the cascade.
FCS-717 List 2B
SYSTEM 1
SYSTEM 2
Figure 9. Connecting the Composite Clock and Alarms
January 6, 2003
Figure 9
P22
NO COM NC
MIN
VIS
MIN
AUD
MAJ
VIS
MAJ
AUD
SHELF
ID
CRIT
P21
CC1
CC1
RING
TIP
CC1
P28
TERM
P27
CC2
CC2
TIP
RING
CC2
TERM
Installation and Test
(refer to
Table 12
for
19
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