NEC SOPHO IP 5000 Command Reference Manual page 137

frame-format
loo pback
Command Reference Guide
Example
Display the information related to the E1 interface.
[NEC-PHILIPS]display controller E1 3/0/0
E1 1-0 is down.
Applique type is Channelized E1 - 75 OHM unbalanced
Framing is NO-CRC4, Line Code is HDB3, Source Clock is slave.
Alarm State is Loss of Frame Alignment.
Syntax
frame-format { crc4 | no-crc4 }
undo frame-format
View
CE1/PRI interface view
Parameter
crc4: Sets the frame format on the CE1 interface to CRC4.
no-crc4: Sets the frame format on the CE1 interface to no-CRC4.
Description
Using the frame-format command, you can set the frame format of CE1
interface. Using the undo frame-format command, you can restore the default
frame format of the interface.
By default, the frame format of CE1 interface is no-crc4.
A CE1/PRI interface working in CE1 mode supports both crc4 and no-crc4
frame formats. Among them, crc4 supports the 4-bit Cyclic Redundancy Check
(CRC) on physical frames whereas no-crc4 does not.
Example
Set the frame format of the interface E1 3/0/0 to crc4.
[NEC-PHILIPS-E1 3/0/0]frame-format crc4
Syntax
loopback { local | remote }
undo loopback
View
CE1/PRI interface view
Parameter
local: Enables the interface to perform local loopback.
remote: Enables the interface to perform remote loopback.
Description
Using the loopback command, you can enable a CE1/PRI interface to perform
loopback. Using the undo loopback command, you can disable the CE1/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.
SOPHO
IP 5000/SOPHO IP6000
137