Diagnostic Ldm Test Command; Diagnostic Loopback F5 Command - ZyXEL Communications MSC1024G Series User Manual

Chapter 26 diagnostic Commands
The following example performs loop diagnostics on DSL port 4 of the line card in slot 5.
The command then displays the results of the ADSL port loop diagnostics.
ras> diagnostic ldm show 5-4 result
port 5-4:
attainable bit rate(kpbs):
loop attenuation(dB)
signal attenuation(dB)
snr margin(dB)
actual tx power fe(dBm)

26.4.5 diagnostic ldm test Command

Syntax:
diagnostic ldm test <slot-port>
This command has the system perform a Loop Diagnostic Mode test. This is a Dual End Loop
Test (DELT). It provides details about the condition of the line on the specified ADSL or
VDSL port. The ADSL port must be set to ADSL, ADSL2 or ADSL2+ operational mode and
have a connection. The VDSL port must be set to VDSL2, ADSL2 or ADSL2+ operational
mode and have a connection. Use the loop diagnostics results to analyze problems with the
physical ADSL or VDSL line. The subscriber device must also support DELT in order to
perform this. This feature is applicable for ALC or VLC line cards only.
It takes about one minute for the loop diagnostics to finish.
The following example performs loop diagnostics on DSL port 4 of the line card in slot 2. The
command then displays the results of the DSL port loop diagnostics.
ras> diagnostic ldm test 2-4

26.4.6 diagnostic loopback f5 Command

Syntax:
diagnostic loopback f5 <slot-port-vpi/vci>
This command has the system perform an OAMF5 loopback test on the specified virtual
circuit. An Operational, Administration and Maintenance Function 5 (OAMF5) test is used to
test the connection between two DSL devices. First, the DSL devices establish a virtual circuit.
Then the local device sends an ATM F5 cell to be returned by the remote DSL device (both
DSL devices must support ATM F5 in order to use this test).
The following example has the system perform a local loopback test on a virtual circuit on
DSL port 5 of the line card in slot 7. The virtual circuit is identified by VPI 0 and VCI 33.
ras> diagnostic loopback f5 7-5-0/33
line 1 oam loopback success!
638
near end far end
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1420
: 1.6
: 0.5
: out of range out of range
: 11.7
MSC1000G/1024G/1224G Series User's Guide
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