Command Reference Guide

180 ● ft1 cable 3Com Router 5000 Family and Router 6000 Family
Command Reference
ft1 cable
Purpose Use the ft1 cable command to configure attenuation or transmission segment
matching the T1-F interface.
Use the undo ft1cable command to restore the default.
Syntax ft1 cable { long decibel | short length }
undo ft1 cable
Parameters long decibel
Matches the transmission segment longer than 655
feet. The argument
decibel can take 0db, -7.5db,
-15db, or -22.5db, depending on the signal quality at
the receiving end. In this case, no external CSU is
required.
short length
Matches the transmission segment shorter than 655
feet. The argument
length can take 133ft, 266ft,
399ft, 533ft, or 655ft, depending on the transmission
segment.
Default By default, the transmission line attenuation matching the T1-F interface is long 0db.
Example Set the transmission segment matching the T1-F interface to 133 feet.
[Router-Serial0/0/0] ft1 cable short 133ft
View This command can be used in the following views:
■ T1-F Interface view
Description This command is used for configuring the signal waveform required for different
types of transmission.In practice, you can decide whether to use this command
according to the signal quality at the receiving end. If the signal quality is acceptable,
you can use the default setting.