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

133
Examples
# Run a 10-minute 2^20 BERT test on T1-F interface Serial 2/1/0.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] ft1 bert pattern 2^20 time 10
Related commands
display ft1
ft1 cable
Use ft1 cable to set the cable attenuation and length on a T1-F interface.
Use undo ft1cable to restore the default.
Syntax
ft1 cable { long decibel | short length }
undo ft1 cable
Default
The cable attenuation length is long 0db.
Views
T1-F interface view
Predefined user roles
network-admin
Parameters
long decibel: Matches 199.6-meter (655-feet) and longer cable length. The argument decibel can be
0db, -7.5db, -15db, or -22.5db, depending on the signal quality at the receiving end. No external CSU
is required.
short length: Matches a cable length shorter than 199.6 meters (655 feet). The argument length can be
133 ft , 266ft, 399ft, 533ft, or 655ft, depending on the actual transmission distance.
Usage guidelines
You can use this command to adapt the signal waveform to different transmission conditions such as the
quality of the signal received by the receiver. If signal quality is good, use the default setting.
Examples
# Set the cable length to 133 feet (40.5 meters) on T1-F interface Serial 2/1/0.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] ft1 cable short 133ft
Related commands
ft1 frame-format
ft1 clock
Use ft1 clock to set the clock mode of a T1-F interface.