Datasheet

1-12
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 1 Shelf and FMEC Hardware
1.8 Cable Routing and Management
Figure 1-8 shows the straight-through Ethernet cable schematic. Use a straight-through cable when
connecting to a router or a PC.
Figure 1-8 Straight-Through Cable
Figure 1-9 shows the crossover Ethernet cable schematic. Use a crossover cable when connecting to a
switch or hub.
Figure 1-9 Crossover Cable
1.8 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 1-10
• 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 1-11 on page 1-13
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
• Cable routing channel that enables you to route cables out either side
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 1-10 shows the cable management facilities that you can access through the fold-down front door,
including the cable-routing channel and cable-routing channel posts.
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Router or PC
3 RD+
6 RD–
1 TD+
2 TD–
H5578
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Switch
3 TD+
6 TD–
1 RD+
2 RD–
H5579