R0106-HP MSR Router Series Interface Command Reference(V7)

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When AMI encoding is used on a T1-F interface, data inversion eliminates the presence of multiple
consecutive zeros.
At the two ends of a T1-F line, the data inversion settings must be the same.
Examples
# Enable user data inversion on T1-F interface Serial 2/1/0.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] ft1 data-coding inverted
Related commands
ft1 code
ft1 fdl
Use ft1 fdl to set the behavior of a T1-F interface on the FDL in ESF framing.
Use undo ft1 fdl to restore the default.
Syntax
ft1 fdl { ansi | att | both | none }
undo ft1 fdl
Default
FDL is disabled.
Views
T1-F interface view
Predefined user roles
network-admin
Parameters
ansi: Adopts ANSI T1.403 for FDL.
att: Adopts AT&T TR 54016 for FDL.
both: Adopts both ANSI T1.403 and AT&T TR 54016 for FDL.
none: Disables FDL.
Usage guidelines
FDL is an embedded 4 kbps overhead channel within the ESF format for transmitting performance
statistics or loopback code.
You can change the setting depending on the setting at the far end.
Examples
# Set ANSI FDL on T1-F interface Serial 2/1/0.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] ft1 fdl ansi