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Parameter ami: Adopts AMI line code format.
b8zs: Adopts B8ZS line code format.
Description Use the
ft1 code command to set the line code format for the T1-F interface.
Use the
undo ft1 code command to restore the default, that is, B8ZS.
Keep the line code format of the interface in consistency with the one used on the
remote device.
Example # Set the line code format of T1-F interface Serial 2/0 to AMI.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] ft1 code ami
ft1 data-coding
Syntax ft1 data-coding { inverted | normal }
undo ft1 data-coding
View T1-F interface view
Parameter inverted: Enables user data inversion.
normal: Disables user data inversion.
Description Use the
ft1 data-coding normal command to disable user data inversion for a
T1-F interface.
Use the
ft1 data-coding inverted command to enable user data inversion for a
T1-F interface.
Use the
undo ft1 data-coding command to restore the default.
By default, data inversion is disabled.
To prevent 7e in valid data from being taken for stuffing characters, HDLC inserts a
zero after every five ones in the data stream. Then, HDLC inverts every one bit into
a zero and every zero bit into a one. This ensures at least at least one out of every
eight bits is a one. When AMI encoding is adopted on a T1-F interface, the use of
data inversion can eliminate presence of multiple consecutive zeros.
At the two ends of a T1-F line, the same data inversion setting must be adopted.
Example # Enable user data inversion on T1-F interface Serial 2/0.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] ft1 data-coding inverted