Setting The Clock Source - Cisco 10000 Series Configuration Manual

Chapter 8 6-Port Channelized T3 Line Card Configuration
Use the no form of the command to return the idle pattern to its default value.
Examples:
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Setting the Clock Source

At the prompt, set the internal or line clock source for the selected T3 controller using the clock source
command. This command is set in controller configuration mode.
clock source {internal | line}
Where:
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The default is clock source internal.
In this example, a T3 controller is instructed to use a line clock source.
Router(config)# controller T3 1/0/0
Router(config-controller)# clock source line
Configuring Loopback Mode
You can configure the T3 controller for a loopback mode using the loopback command.
loopback
[no] loopback
Local and network loopbacks are the same.
To cancel a loopback, use the no form of the command.
For more information on the loopback command, refer to the online
Troubleshooting
Examples:
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OL-8834-04
Set a hexadecimal idle pattern.
Router(config)# controller T3 1/0/0
Router(config-controller)# idle pattern 0x10
Set a decimal idle pattern.
Router(config)# controller T3 1/0/0
Router(config-controller)# idle pattern 23
internal specifies that the internal clock source is used
line specifies that the network clock source is used
[ | |
local network
[ |
local network
Guide.
Configure the T3 controller for local loopback.
Router(config)# controller T3 1/0/0
Router(config-controller)# loopback local
Configure the T3 controller for remote loopback.
Router(config)# controller T3 1/0/0
Router(config-controller)# loopback remote
]
remote
| ]
remote
Cisco 10000 Series Router Line Card Configuaration Guide
Channelized T3 Commands
Cisco 10000 Series Internet Router
8-13