SOPHO IP 5000/SOPHO IP6000
Command Reference Guide 143
Parameter
sf: Sets the frame format of CT1/PRI interface to Super Frame (SF).
esf: Sets the frame format of CT1/PRI interface to Extended Super Frame
(ESF).
Description
Using the frame-format command, you can set the frame format on a CT1/PRI
interface. Using the undo frame-format command, you can restore to the
default frame format on the interface.
The frame format on the CT1/PRI interface defaults to ESF.
A CT1/PRI interface supports two frame formats, that is, SF and ESF. In SF
format, multiple frames can share the same FSC and signaling information, so
that more significant bits can be used for transmitting user data. In practice, a
system should be tested often. The application of ESF makes it possible for the
system to provide the services while it is being tested.
Example
Set the frame format of T1 1/0/0 to SF.
[NEC-PHILIPS-T1 1/0/0]frame-format sf
loopback Syntax
loopback { local | remote }
undo loopback
View
CT1/PRI interface view
Parameter
local: Enables the CT1/PRI interface to perform local loopback.
remote: Enables the interface to perform remote loopback.
Description
Using the loopback command, you can enable a CT1/PRI interface to perform
loopback. Using the undo loopback command, you can disable the CT1/PRI
interface to perform loopback.
By default, the interface is disabled to perform loopback in any form.
Loopback is used to check the condition of interface or cable. This function
should be disabled when they are in normal operation.
If a serial interface formed by bundling timeslots of the CT1/PRI interface is
encapsulated with PPP and is set to perform loopback, it is normal for the state
of the link layer protocol to be reported as DOWN.
Example
Set the interface T1 1/0/0 to perform local loopback.
[NEC-PHILIPS-T1 1/0/0]loopback remote
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