user manual

1-11
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 1 Shelf and FMEC Hardware
1.7 Cable Routing and Management
All E-1 interfaces that are listed in Table 1-2 on page 1-8 with DB-37 or with Molex 96-pin LFH
connectors must be connected using a 120-ohm twisted-pair balanced cable. For the interfaces that use
Molex 96-pin LFH connectors Cisco offers ready-made cables.
1.7 Cable Routing and Management
The ONS 15454 SDH cable management facilities include the following:
• A cable-routing channel (behind the fold-down door) that runs the width of the shelf assembly,
Figure 1-7
• Plastic horseshoe-shaped fiber guides at each side opening of the cable-routing channel that ensure
the proper bend radius is maintained in the fibers, Figure 1-8 on page 1-12
Note You can remove the fiber guide if necessary to create a larger opening (if you need to route
CAT-5 Ethernet cables out the side, for example). To remove the fiber guide, take out the
three screws that anchor it to the side of the shelf assembly.
• A fold-down door that provides access to the cable-management tray
• Reversible jumper routing fins that enable you to route cables out either side by positioning the fins
as desired
Note To remove the jumper slack storage reels, take out the screw in the center of each reel.
• Optional fiber management tray (recommended for DWDM nodes)
Figure 1-7 shows the cable management facilities that you can access through the fold-down front door,
including the cable-routing channel and the jumper routing fins.
Figure 1-7 Managing Cables on the Front Panel
FAN FAIL
CRIT
MAJ
MIN
34238
Reversible jumper
routing fins
Fold down
front door