Symmetricom TimeSource 3100, User Manual

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TimeSource 3100
73
Installation
097-72020-01 Issue 9: November 2003
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S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S
Cutover Procedures for In-Service Equipment
If standard digital signal level access jack sets, such as DDF or DSX-1 jacks, were cabled to
the ESCIU module, the following in-service cutover procedure must be used. Consult the
local company Installation Job Specifications to ensure that the network element to be re-
timed from the ESCIU module will be connected to the ESCIU module A OUT terminals.
Refer to Figure 23 for the following procedure:
1. Patch a bridging repeater from the MON jack of one NE to the IN jack of the other NE
in both directions of transmission on the E1 system to be cutover. Place a 75
Ω
termination plug in the OUT jack in each direction.
2. Remove the cross-connect wiring from the OUT and IN jacks (off-normal side of jacks)
in both directions of transmission.
3. In the direction not to be synchronized by the ESCIU module, connect new cables from
the ESCIU module RTNx IN connector to the NE transmit (OUT) terminal, and connect
from the ESCIU module RTNx OUT connector to the NE receive (IN) terminal.
4. In the direction to be synchronized by the ESCIU module, connect new cables from the
ESCIU module IN connector to the NE transmit (OUT) terminal, and connect from the
ESCIU module OUT connector to the NE receive (IN) terminal.
5. Remove the 75
Ω
(E1) termination plug from the OUT jack and patch cords from the NE
IN jack. The E1 system bitstream is now going through the ESCIU module.
6. Verify that there are no alarms on the NEs on the E1 system. If there are alarms, reinsert
patch cords in the IN jack and the termination plugs in the OUT jack. Recheck the cross-
connect wiring just installed, and repeat Step 5.
7. Remove the remaining patch cords from the NE MON jack.