Lucent Technologies DEFINITY Installation For Adjuncts And Peripherals page 160

DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals 555-233-116
11 Stratum 3 Clock
Set Clock Options
The H600-307 cable connects the system end of the Y-cable to a DS1 circuit
pack (shown as TN464 or TN767E). The B25A cable connects the clock end of
the Y-cable to the yellow field cross-connect.
Stratum 3 Clock Wiring Installation Procedure
1. Connect the B25A cables from the TN780 connector panel slot on the
system cabinet and the Stratum 3 Clock to the cross-connect module in
the yellow field.
2. Connect the CSU plug end of the H-600-274 Y-cable to the primary CSU.
Route an H600-307 cable from the DS1 connector panel slot on the
system cabinet to the connector on the "SYSTEM" end of the Y-cable.
3. Route a B25A cable from the "CLOCK" end of the Y-cable to the cross-
connect module in the yellow field.
4. Repeat steps 2 and 3 for the secondary CSU. The maximum allowable
cabling distance between the Stratum 3 clock and the CSU is shown in the
table below.
Table 20. Maximum Cabling Distance for Different CSUs
Channel Service Unit (CSU)
551A
551V
551V EFS/R
EFS T1
5. For standard reliability systems, refer to Y-cable to cross-connect the
TN780 and "CLOCK" end connections to the Stratum 3 clock connections
on the cross-connect module.
6. For high or critical reliability systems, refer to table below to cross-
connect the TN780 and "CLOCK" end connections to the Stratum 3 clock
connections on the cross-connect module.
Maximum Cabling Distance
85 feet (27 m)
85 feet (27 m)
755 feet (199.7 m)
755 feet (199.7 m)
Issue 1
April 2000
138