R3303-HP HSR6800 Routers Interface Command Reference

119
Views
E1-F interface view
Default command level
2: System level
Parameters
inverted: Enables user data inversion.
normal: Disables user data inversion.
Usage guidelines
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 that at least at least one out of every eight bits is a one. When AMI encoding is adopted on an
E1-F interface, the use of data inversion can eliminate presence of multiple consecutive zeros.
At the two ends of an E1-F line, the same data inversion setting must be adopted.
Examples
# Enable user data inversion on E1-F interface Serial 2/0/0.
<Sysname> system-view
[Sysname] interface serial 2/0/0
[Sysname-Serial2/0/0] fe1 data-coding inverted
fe1 detect-ais
Use fe1 detect-ais to enable AIS test on an interface.
Use undo fe1 detect-ais to disable AIS test.
Syntax
fe1 detect-ais
undo fe1 detect-ais
Default
AIS test is performed.
Views
E1-F interface view
Default command level
2: System level
Examples
# Enable AIS test on E1-F interface Serial 2/0/0.
<Sysname> system-view
[Sysname] interface serial 2/0/0
[Sysname-Serial2/0/0] fe1 detect-ais