Command Reference Guide

112 ● ft3 (CT3 Interface) 3Com Router 5000 Family and Router 6000 Family
Command Reference
ft3 (CT3 Interface)
Purpose Use the ft3 command to configure the CT3 interface to operate in FT3 mode and
to set the DSU mode and subrate for FT3.
Use the undo ft3 command to restore the default DSU mode or subrate.
Syntax ft3 { dsu-mode { 0 | 1 | 2 | 3 } | subrate number }
undo ft3 { dsu-mode | subrate }
Parameters dsu-mode
Sets the data service unit (DSU) mode for fractional T3
(FT3). The following table lists available FT3 DSU mode
options:
subrate number
Sets a T3 subrate, in the range 1 to 44,210 kbps.
Default By default, DSU mode is set to 0, that is, Digital Link mode; the T3 subrate is set to
44,210 kbps.
Example Configure interface T3 1/0/0 to operate in FT3 mode, and set DSU mode to 1 and
subrate to 3000 kbps.
[3Com -T3 1/0/0] using t3
[3Com -T3 1/0/0] ft3 dsu-mode 1
[3Com -T3 1/0/0] ft3 subrate 3000
View This command can be used in the following views:
■ CT3 Interface view
Description FT3, also known as subrate T3, is a nonstandard application of T3. The subrate and
number of subrate grades vary with different vendors. The
ft3 command allows your
router to be compatible with five mainstream FT3 DSU modes in the industry.
Table 1 FT3 DSU mode options
Keyword DSU mode (vendor) Subrate range
Total number of subrate
grades
0 Digital Link 300 to 44210 kbps in steps of
300,746 bps
1 Verilink 1500 to 44,210 kbps in steps
of 1,578,918 bps
20
2 Larscom 3100 to 44,210 kbps in steps
of 3,157,835 bps
14
3 Adtran 75 to 44,210 kbps in steps of
75,187 bps
588