Clearing The Loopback State Of An Ft1 Channel; Configuring Bert Testing - Nortel Versalar 15000 Troubleshooting Manual

The following example shows how to send loop-up and loop-down signals over
slot 2, connector 1, FT1 channel 5, logical line 6, time slot 7:
ft1/2/1/5#
ft1/2/1/5#
ft1/2/1/5#

Clearing the Loopback State of an FT1 Channel

A logical-line-test object that accepts a remote loop-up signal stays in a loopback
state until it receives a loop-down signal.
To clear a loopback state, go to the logical-line-test prompt (for example,
logical-line-test/2/1/5/6
clear-fractional-loop-state {no-action
no-action
setting.
timeslot
state.
The following example shows how to clear the loopback state on slot 2,
connector 1, FT1 channel 5, logical line 6:
logical-line-test/2/1/5/6#
logical-line-test/slot/ds3/ds1/logical-line#

Configuring BERT Testing

The bit error rate test (BERT) involves transmitting a known pattern of bits and
then counting the errors received to determine the bit error rate (BER). This is
done to measure the quality of the data tranmission. The BER is the ratio of
received bits that are in error, relative to the number of bits received. It is usually
expressed in powers of 10.
The following sections describe how to conduct a BERT:
•
•
•
302768-C Rev 00
send-feac-loop-up-code 7
send-feac-loop-down-code 7
) and enter the following command:
does not clear the fractional loop state. This option is the default
is a timeslot from 1 to 24 on which you want to clear the fractional loop
Selecting a BERT Pattern for a Channel
Selecting the Type of BERT Error to Insert on a Channel
Selecting the Type of Alarm Signal to Be Generated in BERT Mode
Monitoring and Troubleshooting
|
< timeslot >}
clear-fractional-loop-state 6
6-13