Chapter 3 Installing the Chassis
Running Online Tests
Step 3 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:
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.
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.
Note 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.
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