NEC SOPHO IP 5000 Command Reference Manual page 151

ft1 loopback
ft1 timeslot-list
Command Reference Guide
Parameter
sf: Adopts SF as the framing format for the T1-F interface.
esf: Adopts ESF as the framing format for the T1-F interface.
Description
Using the ft1 frame-format command, you can configure the framing format for
a T1-F interface. Using the undo ft1 frame-format command, you can restore
the default framing format of the interface.
By default, T1-F interfaces use esf.
T1-F interfaces support SF and ESF. In SF, multiple frames can share the same
frame synchronization and signaling information, so that more significant bits
can be used for transmitting user data. In practice, the system test is often
required. The application of ESF technology can ensure normal service when
system test is being carried out.
Example
Set the framing format for the T1-F interface to SF.
[NEC-PHILIPS-Serial0/0/0] ft1 frame-format sf
Syntax
ft1 loopback { local | remote }
undo ft1 loopback [ local | remote ]
View
T1-F interface view
Parameter
local: Places the interface in local loopback.
remote: Places the interface in remote loopback.
Description
Using the ft1 loopback command, you can configure a T1-F interface in local or
remote loopback. Using the undo ft1 loopback command, you can disable the
local and remote loopback on the interface.
By default, the interfaces are not placed in local or remote loopback.
Local loopback and remote loopback are used for testing the state of interface
or cable itself. These functions should be disabled in normal cases. On an
interface, using this command but with different arguments can respectively
enable local loopback and remote loopback, but these two functions cannot be
enabled at the same time.
Example
Place the T1-F interface in local loopback.
[NEC-PHILIPS-Serial0/0/0] ft1 loopback local
Syntax
ft1 timeslot-list { all | range } [ speed { 56 | 64 } ]
undo ft1 timeslot-list
T1-F interface view
SOPHO
IP 5000/SOPHO IP6000
151