3Com 3031 Command Reference Manual page 176

176 C 3: I
HAPTER NTERFACE
frame-format
loopback
M C
ANAGEMENT OMMANDS
Frame check mode of interface
Line code format of interface
Example
Display the information related to the T1 interface.
[3com]display controller t1 1/0/0
Syntax
frame-format { sf | esf }
undo frame-format
View
CT1/PRI interface view
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.
[3com-T1 1/0/0]frame-format sf
Syntax
loopback { local | remote }
undo loopback
View
CT1/PRI interface view