Nortel Communication Server 1000 Manual page 166

166 Clock Controller installation and removal
Table 90
installing or replacing the QPC775 or NTRB53 Clock Controller (cont'd.)
Step Action
9
Disconnect cables from Clock Controller (CC) card.
Response: If the CC to CC cable (connector J3) is disconnected, the card in
the active shelf will be active. The clock cannot be switched unless this cable
is connected at both ends. The clock status display will indicate NO UART (no
universal asynchronous receiver transmitter). This is normal, however, do not
perform a clock status check when receiving this code.
10
Remove CC card from shelf.
Response: If the CC card is removed from the active shelf, the Peripheral Shelf
(PS) card will distribute clock. If the CC to CC cable (connector J3) is disconnected,
and the faceplate switch of the CC in the active shelf is or becomes disabled then
the clock control will become disabled and the PS card will distribute clock, and
when clock status is read by the CPU, the CC card will respond as being active
clock, but disabled.
11
Install replacement Clock Controller in the same slot.
The Clock Controller card can also be plugged into the active shelf without
switching the CPU.
12
Run and connect cables.
Always set the faceplate switch to DISABLE before removing or installing the
CC-to-CC cable (J3 connector), but remember, call processing will cease if the
cable is connected and BOTH Clock Controllers are disabled.
•
Connect Primary reference to J2.
•
If available, connect Secondary reference to J1.
•
Connect cables between Clock Controllers (J3 to J3), for single group systems
only.
13 Set faceplate toggle switch to ENABLE.
14 Turn off DISABLE LED using LD 60 and the ENL command.
15 Add related office data into switch memory.
Nortel Communication Server 1000
DASS2 Fundamentals
NN43001-571 04.01 4 June 2010
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