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Figure 4-7
Test Box
Attenuate the output of the A and B ports between -10 and -28 to avoid damage to the CLIP DWDM
d.
receivers before looping them back.
Loop the B-side INPUT and OUTPUT ports together on the bottom SCU.
e.
Loop the A-side INPUT and OUTPUT ports together on the top SCU.
f.
Run a fiber from the B-side OUTPUT port of the top SCU to the A-side INPUT port of the second
g.
SCU.
Check each OUTPUT port with an OSA before connecting it to the next INPUT port and before
inserting the required number of attenuators. Verify that the level of the channel to be dropped at the
next SCU is within operating levels of the DWDM receivers. As a rough guide, the input power
should be between -25 and -10 dBm (receiver operating range is -30 and -8 dBm).
h.
Repeat Step
shown in
i.
From the bottom SCU, run a fiber from the A-side OUTPUT port to the B-side INPUT port of the
previous SCU. Check each OUTPUT port with an OSA before connecting it to next INPUT port.
Repeat Step
j.
Figure
Verify that the level of the channel to be dropped at the next SCU is within operating levels of the
k.
DWDM receivers. As a rough guide, the input power should be between -25 and -10 dBm (receiver
operating range is -30 and -8 dBm).
To test unprotected channels, clear all errors on the test set and run the BER test error-free for 15
Step 20
minutes. Complete Step
Step 21
Test A-side protected channels and all unprotected channels:
Disconnect the jumper cable on the B-side INPUT port of the bottom SCU in loopback mode.
a.
Reconnect the B-side jumper cable and verify that all protected SCUs identify the A side as Active
b.
and the B side as Standby.
Cisco ONS 15200 Installation, Setup, and Test Manual
4-18
ONS 15201 SCU in a daisy-chain configuration
Client
Rx
Tx
Client
Client
3f–g
for all SCUs, connecting the B-side OUTPUT port to the A-side INPUT port as
Figure
4-7.
3d.
for all SCUs, connecting the A-side OUTPUT to the B-side INPUT, as shown in
4-7.
20
in
Table B-11 on page
A
B
Out
In
A
B
Out
In
A
B
Out
In
B-7.
Chapter 4
Turn Up and Test
78-13765-01
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