3Com 10014299 manual Enter specified CT3 interface view, Set clock mode of the CT3 interface

150CHAPTER 10: CONFIGURING WAN INTERFACE

■Set CRC of the Serial Interface

Depending on the networking requirements, the user perhaps needs to configure the parameters such as PPP, Frame Relay and IP address for the CT3 interface. For details, refer to the involving chapters.

1Enter the view of the specified CT3 interface

CT interface uses the controller command to enter its view. Perform the following configuration in system view.

Table 174 Enter specified CT3 interface view

Operation	Command
Enter specified CT3 Interface view	controller t3 interface-number

2Set Clock Mode

CT3 Interface supports two clock modes:

■Master clock mode: to use internal clock signal

■Slave clock mode: to use line clock signal

Perform the following configuration in CT3 Interface view.

Table 175 Set clock mode of the CT3 interface

Operation	Command
Set clock mode of the CT3 interface	clock { master slave }
Restore the default clock mode of CT3 interface	undo clock

By default, CT3 interface uses slave clock.

The user can also set clock mode for T1 channels of CT3 interface.

Table 176 Set clock mode of the T1 channel

Operation	Command
Set clock mode of the T1 channel	t1 line-numberset clock {
	master slave }
Restore the default clock mode of T1 channel	undo t1 line-numberset clock

By default, T1 channel uses slave clock.

3Set Cable Length

Use the cable command to set the distance between the router and the cable distribution frame.

Perform the following configuration in CT3 interface view.

Table 177 Set cable length of the CT3 interface

Operation	Command
Set cable length of the CT3 interface	cable feet
Restore the default cable length	undo cable

By default, the cable length of the CT3 interface is set to 350 feet.

4Set Loopback Mode

The CT3 interface supports loopback test on data at the rate of DS-3. Do not enable the loopback function in normal operation.

Perform the following configuration in CT3 interface view.