Configuring a CT3 interface in T3 mode

1. Enter system view.

system-view

N/A

2. Enter CT3 interface view.

controller t3 interface-number

N/A

3. Configure the interface to operate in T3 mode.

using t3

The default operating mode is CT3 mode.

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

ft3 { dsu-mode { 0 | 2 | 3 | 4 } | subrate number }

By default:

• DSU mode 0 (the digital link mode) is used.

• 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 CT3 interface is slave, which is line clock.

7. Set the cable length.

cable feet

The default is 14.9 meters (49 feet).

8. Set the framing format for the CT3 interface.

frame-format { c-bit | m23 }

By default, the framing format on the CT3 interface is C-bit.

9. (Optional.) Set the loopback mode.

loopback { local | payload | remote }

By default, loopback is disabled.

10. (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.

11. (Optional.) Configure FEAC channel signal detection/sending on the CT3 interface.

• feac detect

• feac generate loopback { ds3-line | ds3-payload }

• feac generate { ds3-los | ds3-ais | ds3-oof | ds3-idle | ds3-eqptfail }

By default, FEAC channel signal detection is enabled, but no FEAC signals are sent.

12. (Optional.) Configure MDL message detection/sending on the CT3 interface.

mdl { data { eic string | fic string | | gen-no string | lic string | pfi string | port-no string | unit string } | detect | generate { idle-signal | path | test-signal } }

By default, MDL message detection and sending are disabled and the default MDL message information applies.

13. (Optional.) Restore the default settings for the CT3 interface.

default

N/A

14. (Optional.) Bring up the CT3 interface.

undo shutdown

By default, a CT3 interface is up.

15. Return to system view.

quit

N/A

16. Enter synchronous serial interface view.

interface serial number/0:0

Make sure the synchronous serial interface is the one created for the CT3 interface.

17. Set the CRC mode.

crc { 16 | 32 | none }

The default is 16-bit CRC.