Cisco Systems 78-10588-03 Manuel D’Utilisation

The power levels cannot be checked without special measurement
equipment because of the automatic laser shutdown (ALS). All
power measurements must be done in-line because of ALS.

System checkout and online testing are usually performed during working hours.
Be sure to coordinate these tasks with the Cisco authorized representative.

Online testing varies from site to site depending on the CPU, operating systems
in use, and the local channels being connected.

Be sure to set up and run your test jobs before installing the unit. Test jobs must
be set up and verified by the customer prior to the actual installation of the system.
For test purposes, you can force the laser on by means of the network management
system as described in the Cisco Metro 1500 Series Software Configuration
Guide.

If your test results of the remote link deviate from the results
described in these steps and you cannot correct the problem, contact
your service representative.

Although the optical side of the Cisco Metro 1500 series system is designed to be
plug and play, it is common practice to verify input and output levels for the
optical interfaces existing in a typical connection because optical connections are
susceptible to dust and optical cables can be ruined by physical abuse.

Budget measurements should be carried out at points A and F to check whether
the user equipment is correctly interfaced. The budget measurement at point A
should be within the range specified on the Cisco Metro 1500 series label.
Measurement at point E is required to check whether the attenuation over the long
distance is within the power budget. Budget measurements at point C and point
D, measured at the remote side, can be used to calculate loss-levels of the
connecting fiber line. All channel modules leaving the factory are accompanied
by a test report.