Procedure

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter T3 interface view.

controller t3 interface-number

N/A

3. Create a serial interface for the T3 interface.

using t3

By default, no serial interfaces are created for a T3 interface.

4. (Optional.) Configure the interface to operate in FT3 mode and set the subrate.

ft3 subrate number

By default, the subrate is 44210 kbps.

5. (Optional.) Configure the interface description.

description text

By default, the description of an interface is interface-name Interface.

6. Set the clock mode.

clock { master | slave }

The default clock mode for the T3 interface is slave, which is line clock.

7. Set the cable length.

cable feet

The default is 14.9 meters (49 feet).

8. (Optional.) Set the loopback mode.

loopback { local | payload | remote }

By default, loopback is disabled.

9. (Optional.) Configure alarm signal detection/sending.

alarm { detect | generate { ais | febe | idle | rai } }

By default, alarm signal detection is enabled and alarm signal sending is disabled.

10. (Optional.) Restore the default settings for the T3 interface.

default

N/A

11. (Optional.) Bring up the T3 interface.

undo shutdown

By default, a T3 interface is up.

12. Return to system view.

quit

N/A

13. Enter synchronous serial interface view.

interface serial number/0:0

Make sure the synchronous serial interface is the one created for the T3 interface.

14. Set the CRC mode.

crc { 16 | 32 | none }

The default is 16-bit CRC.