23
Step Command
Remarks
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.
Configuring a CT3 interface in CT3 mode
When you change the interface state during the configuration, make sure you understand the
following information:
•
Shutting down or bringing up a CT3 interface also shuts down or brings up all its lines and serial
interfaces, including:
{
T1 lines demultiplexed from the CT3 interface.
{
Serial interfaces created for unframed T1 lines.
{
The serial interfaces created for channel sets on framed T1 lines.
•
Shutting down or bringing up a T1 line also shuts down or brings up the serial interface created
for it.
