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You can view the results of the internal diagnostic test by displaying the contents of
the line-diag-stat profile, as shown in the following example:
admin> read line-diag-stat {1 1 1}
LINE-DIAG-STAT/{ shelf-1 slot-1 1 } read
admin> list
[in LINE-DIAG-STAT/{ shelf-1 slot-1 1 }]
physical-address* = { shelf-1 slot-1 1 }
bert-operation-state = stopped
idt-operation-state = stopped
bert-error-counter = 0
idt-send-count = 1000
idt-recv-count = 1000
idt-error-counter = 0
If you attempt to change the setting of the idt-enable parameter while an internal
diagnostic test is active for a line, the system generates a warning message, as in the
following example:
admin> set idt-enable = no
admin> write
LOG warning, Shelf 1, Controller-1, Time: 20:12:30--
IDT Test for {1 3 1} is running !
LINE-DIAG/{ shelf-1 slot-3 1 } written
Configuring a bit-error-rate test (BERT)
To run a BERT, set the bert-enable parameter to yes. The test counts bit errors
continuously for the interval specified by the bert-timer parameter. If both the CPE
and COE are connected and have BERT enabled, the test runs between the two
systems. If the two ends are not connected, the test runs within the SHDSL interface
in the Stinger unit.
Following is an example of setting up a BERT:
[in LINE-DIAG/{ shelf-1 slot-1 1 }]
admin> set bert-timer = 5
admin> set bert-enable = yes
admin> write
LINE-DIAG/{ shelf-1 slot-1 1 } written
To view the status and results of the BERT, display the contents of the
line-diag-stat profile for the tested line.
Configuring an external diagnostic test (EDT)
The external diagnostic test (EDT) feature puts the DSL modem into loopback mode.
If a complete circuit is established, you can then send a data stream from an external
device (such as a network traffic generator) through the trunk to the modem. The
modem loops back the data stream to the external device, where it can be analyzed.
The loop-back parameter is described in "Configuring port settings for SHDSL" on
page 8-2.
Stinger® MRT Getting Started Guide
Configuring the SHDSL line interfaces
Diagnostic internal, external, and bit error-rate tests
8-19
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