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Loopback is intended for checking the condition of interfaces or cables. Disable it
otherwise.
n
The three loopback modes cannot be used at the same time on a T1-F interface.
Example # Set T1-F interface Serial 2/0 in local loopback mode.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0]ft1 loopback local
ft1 timeslot-list
Syntax ft1 timeslot-list list [ speed { 56k | 64k }]
undo ft1 timeslot-list
View T1-F interface view
Parameter list: Specifies timeslots to be bundled. They are numbered 1 through 31. You may
specify a single timeslot by specifying its number, a range of timeslots by
specifying a range in the form of number1-number2, or several discrete timeslots
by specifying number1, number2-number3.
speed { 56k | 64k }: Time slot bundling speed in kbps. If 56k applies, timeslots are
bundled into an N × 56 kbps bundle. If 64k (the default) applies, timeslots are
bundled into an N × 64 kbps bundle.
Description Use the
ft1 timeslot-list command to bundle timeslots on a T1-F interface.
Use the undo ft1 timeslot-list command to restore the default.
By default, all the timeslots on the T1-F interface are bundled to form a 1536 kbps
interface.
Timeslot bundling results in interface rate change. For example, after you bundle
timeslots 1 through 10 on the interface, the interface rate becomes 10 × 64 kbps
or 10 × 56 kbps.
Only one channel set can be created on a T1-F interface, and this channel set is
associated with the current synchronous serial interface. On a CT1/PRI interface,
however, you may create multiple channel sets; for each of them, the system
automatically creates a synchronous serial interface.
Example # Bundle timeslots 1, 2, 5, 10 through 15, and 18 on T1-F interface Serial 2/0.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] ft1 timeslot-list 1,2,5,10-15,18