CopperOptics 150-1319-41, Руководство пользователя

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Revision 01 July 31, 1997 Section 363-719-141
PG-Flex FCS-719 PairGain Engineering - Plant Series Page 25
8.6 Composite Clock. When required for digital services, connect the composite clock (Figure 8).
You can cascade the composite clock to other PG-Flex shelves.
1 Connect the composite clock leads from the primary master clock source in the CO to CC1_TIP
and CC1_RING termination 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 termination 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.
The composite clock must be terminated only at the end of it’s cable.
Figure 8. Connecting the Composite Clock and Alarms
8.7 Alarms. If external audible and visual alarm indications are required, connect the audible and
visual alarm leads from the CO alarm panel to the COT alarm contacts on PG-Flex according to local
practice, Figure 8, and Table 12.
8.8
External Alarm Cutoff (EXT_ACO, CKT_GND). A momentary connection between EXT_ACO
(P23, pin 1) and CKT_GND (P23, pin 2) will silence the PG-Flex audible alarms (Figure 8, and
Table 11).