Mtu (Serial Interface Context); No Channel Group (Controller Context); No Loopback (Controller Context) - Avaya X330W2-DS1 User Manual

Chapter 7 X330WAN CLI Commands
loopback remote {line|payload}
line
payload
Example:
X330WAN-2DS1-1(config-controller:1)#loopback remote line

mtu (Serial interface context)

Use the mtu command to set the interface Maximum Transmission Unit (MTU). Use
the no form of this command to restore interface MTU to the default value (1500).
The syntax for this command is:
[no] mtu <size in bytes>
size in bytes
Example:
X330WAN-2DS1-1(config-if:Serial1:1)# mtu 1000

no channel group (Controller context)

Use the no channel group command to delete a channel group.
The syntax for this command is:
no channel-group <channel-num>
channel-num
Example:
X330WAN-2DS1-1(config-controller:1)# no channel-group 2

no loopback (Controller context)

Use the no loopback command to disable the loopback mode.
136
The controller loops the external line signal back toward the
network without reframing the DS1 signal.
The controller loops the external line signal back toward the
network and reframes the DS1 signal. (This option is available
in the framing esf mode and only when fdl is defined.)
Range from 64-1500
ID number to identify the channel group. The valid
range is from 0 to 23 for T1 lines and from 0 to 30 for
E1 lines.
Avaya X330W-2DS1 User's Guide