Loopback (/Pri Interface) - 3Com 3C13618 Command Reference Manual

3Com Router Command Reference Guide — V1.00
Parameter
sf: Set the frame format on the /PRI interface to Super Frame (SF) format .
esf: Set the frame format on the /PRI interface to Extended Super Frame (ESF)
format.
Description
Using the frame-format command, you can configure the frame format on the /PRI
interface. Using the undo frame-format command, you can restore the default
setting of the frame format on the interface.
A /PRI interface supports two frame formats: SF and ESF. In SF format, multiple
frames can share the same frame-synchronization information and signaling
information, so that more significant bits can be used to transmit user data. In
practice, a system should be tested often. The application of ESF satisfies the
requirement that the services are still in normal operation even at the time of testing.
Example
# Set the frame format of T1 0 to SF.
[3Com-T1-0]frame-format sf

3.3.8 loopback (/PRI Interface)

Syntax
loopback { local | remote }
undo loopback { local | remote }
View
/PRI interface view
Parameter
local: Set the /PRI interface to carry out internal loopback.
remote: Set the /PRI interface to carry out external loopback .
Description
Using the loopback command, you can enable the /PRI interface to carry out internal
loopback and external loopback. Using the undo loopback command, you can
disable the interface to carry out internal loopback and external loopback.
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