System Manual 6. Maintenance
76.7300FP11/2, Rev A 8/09 Page 2-107
__ Clean all new system interconnect connectors prior to insertion.
__ Use new cleaning material for each connector. Never reuse cleaning
materials, unless directed to do so in a procedure.
__ Always insert the receive cable into the channel first, and then insert
the associated transmit cable.
6.29 Observe the following admonishments before proceeding with any one of
the cleaning procedures:
DANGER:
Do not examine fiber optic cables when there is a light source present. Before
examining fiber optic cables with unfiltered magnifying lenses or microscopes,
perform the following actions to prevent accidental exposure to optical radiation:
• perform the necessary steps to disable the laser source of the fiber
to be examined.
• disconnect the optical path from all relevant optical modules
Turning off a laser source in the Tellabs 7300 NE disrupts traffic.
DANGER:
Open ports and optical cable ends on the shelf can have invisible laser
emissions greater than the class 1 limit and can cause eye damage if viewed
directly. Do not look into an open optical port or the end of a disconnected optical
cable. Place dust caps on any unused transmit or receive port, especially the
transmit port.
DANGER:
Module laser emissions. Place dust caps on any unused receive or transmit port,
especially on the transmit port — even if the fiber optic cable is removed tempo-
rarily for servicing. Arrows on the module next to the ports indicate the direction
of light emission. Potential eye damage may result to anyone passing by who
decides to look toward the system or approach it.
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