Step Command Remarks
13. (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.
14. (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.
15. (Optional.) Place a T1 line on
the far-end CT3 interface in a
loopback.
t1 line-number sendloopcode
{ fdl-ansi-line-up |
fdl-ansi-payload-up |
fdl-att-payload-up |
inband-line-up }
By default, no loopback mode is
set.
16. (Optional.) Set the FDL format
for a T1 channel.
t1 line-number set fdl { ansi | att |
both | none }
By default, FDL is disabled.
This operation applies only to T1
channels that are formed on CT3
interfaces, operate in channelized
mode, and use ESF as the T1
framing format.
17. (Optional.) Restore the default
settings for the CT3 interface.
default N/A
18. (Optional.) Bring up the CT3
interface and a T1 line on the
interface.
• Bring up the CT3 interface:
undo shutdown
• Bring up a T1 line on the CT3
interface:
undo t1 line-number shutdown
By default, a CT3 interface is up.
By default, a T1 line is up.
Use this command with caution,
because once an interface is shut
down, it stops operating.
19. Return to system view.
quit N/A
20. Enter synchronous serial
interface view of an interface
formed on a CT3 interface.
• interface serial
number/line-number:0
• interface serial
number/line-number:set-numb
er
N/A
21. Set the CRC mode.
crc { 16 | 32 | none } By default, 16-bit CRC is adopted.
Serial interfaces created on CT3 interfaces support the following protocols:
• Data link layer protocols, such as PPP, MP, and HDLC.
• Network layer protocols, such as IP.
Displaying and maintaining CT3 interfaces
Execute display commands in any view and reset commands in user view.
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