Cisco Systems 78-10588-03 Manuel D’Utilisation

Use the ocmstate command to switch on the local loop. Now you can measure the
output power at point F. Afterwards, switch off the local loop. To measure at
points B or C, follow Steps 1 and 2 and then Step 4:

Use the ocmstate command to switch the remote laser to “forced ON” to overcome
ALS. Then measure at points B and C. If you want to measure the input at points
D or E, follow Steps 1, 2, and 3 and then Step 5.

Use ocmstate to activate the remote loopback on the remote side of the link.

The link comes up. All lasers and receivers at the channel module are on and the
remote receiver and the remote transmitter at the channel module on the remote
side of the link are on. The local transmitter at the channel module at the remote
side of the link is also on to allow measurements.

In case you do not have an adequate external modulated light source, you can use
the modulated light (100 MHz) of the pilot laser of the Cisco Metro 1500 series
system’s RSM (only an option if your Cisco Metro 1500 series system is equipped
with an RSM). In this case, in Step 2 you connect the local RSMs B/R (output of
the pilot laser) to the connector labeled L/R (local receiver) of the channel
module. The output of the pilot laser is sent against traffic.

Do not forget to set or enable clocks, disable loopback and enable
automatic mode for the RSM before putting the Cisco Metro 1500
series units into service.