ZyXEL Communications MSC1000G Series, User Manual

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Chapter 23 diagnostic Commands
Management Switch Card User’s Guide
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The following example shows the result of the last test conducted on the line connected to port 13
of slot 7.
23.7 diagnostic selt Commands
Use these commands to perform Single End Loop Tests on subscriber ports.
23.7.1 diagnostic selt show Command
Syntax:
diagnostic selt show <slot>|< slot-port >
This command displays the Single End Loop Test (SELT) result after you have performed a SELT test
on the specified port on the line card. The report tells you what gauge of telephone wire is
connected to the port and the approximate length of the line measured both in meters (m) and
thousands of feet (Kft).
23.7.2 diagnostic selt test Command
Syntax:
diagnostic selt test < slot-port >
This command starts the Single End Loop Test (SELT) on the specified port on the line card. This
test checks the distance to the subscriber’s location.
Note: The port must have an open loop. There cannot be a DSL device, phone, fax
machine or other device connected to the subscriber’s end of the telephone line.
23.8 diagnostic loopback e1 Commands
Use these commands to perform a physical loopback test on an E1 port.
23.8.1 diagnostic loopback e1 Commands
Syntax:
diagnostic loopback e1 set < slot-port > < lpbkmode >
where
lpbkmode = 0~3
ras> diagnostic oam show 7-13
4 of 4 test ok, time =1(ms), 4000.0 (pkt/sec)
Test status: OK
0
(None LPBK)
=
stop the previous E1 loopback test