Installation guide

5
Cisco Clock Module (WS-C6K-CL and WS-C6513-CL) and VTT Module (WS-C6K-VTT) Installation Note
78-10498-05
Replacing the VTT Modules and Clock Modules
To remove the front panel safety cover, perform these steps:
Step 1 On any modules running Cisco IOS software, save the running configuration.
Step 2 Shut down the switch and unplug all power cords to all power supplies.
Warning
Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord.
Step 3 Use a Phillips screwdriver to remove the front panel screws:
16 screws on the Catalyst 6006 and 6506 chassis
18 screws on the Catalyst 6009 and 6509 chassis
8 screws on the Catalyst 6509-NEB and Cisco 7609 (OSR-7609) chassis (4 on the top, 4 on the
bottom)
20 screws on the Catalyst 6509-NEB-A and Cisco 7609 (CISCO7609) chassis
22 screws on the Catalyst 6513 and Cisco 7613 chassis
Locating the VTT Modules and Clock Modules
See Figure 1 for the location of the VTT modules and clock modules on the Catalyst 6500 series
switches, and the Cisco 7609 (OSR-7609 and CISCO7609) and 7613 routers.
Note Do not use the WS-C6K-CL= clock module in the Catalyst 6509-NEB-A switch and Cisco 7609 router
(CISCO7609). Instead, use the CLK-7600= clock module. For more information, refer to the Cisco
Clock Module CLK-7600 Installation Note at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/core/cis7600/hardware/78_15002.htm
Note The location of the VTT modules and clock modules is the same on the Catalyst 6006, 6009, 6506, and
6509 switches.