Alcatel-Lucent 7750 SR-a4, Installation Manual, Page: 121 / 232

Installing Components
7750 SR-a4 and SR-a8 Installation Guide 121
Fiber Cables
Fiber-optic cables are routed in a similar fashion to Ethernet and copper wire cables. Cables
are routed to the left or right of the chassis.
Hardware required:
• Velcro straps (optional)
To attach fiber cables:
Step 1. Attach the cable to the port connector or SFP connector on the adapter card.
Step 2. Route the cables to the left or right of the chassis. If needed, use a Velcro strap to
bundle the cables from each card.
Step 3. Attach the fiber cable to a distribution panel or appropriate connector.
Alarm Port Connections
The Alarm port on the CPM-a has a 15-pin DB connector. Use a shielded cable to connect
the Alarm port to a suitable alarm panel, such as a punch-down or wire-wrap panel. See
Alarms Interface Port Pinouts on page 218 for the required pinout information.
To connect the Alarm port:
Step 1. Connect the cable assembly to the External Alarm port.
Step 2. Route the cable to the left or the right of the chassis.
Step 3. Connect the far end of the cable to the alarm panel.
Warning:
• Fiber cables are sensitive to bending, twisting and pulling. Extreme caution is
recommended when handling fiber cable.
• To ensure that the minimum fiber bend radius is maintained in the allowable space
AT&T TP-76450 specifies a minimum of 1.0 in (25.4 mm) inside radius for single fibers.
• Use fiber cable with a pre-installed open-angled 90º boot.
• Observe correct fiber connector handling regarding the use of dust covers and cleaning.