Aethra D2000 Lite, User Manual

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USER’S MANUAL ISDN TESTER AND ANALYZER D2000
PRO
/D2000Lite/D2000
4 Reset the counters.
The three pages show the following results for each call:
The first line indicates the status of the test.
►
Bit Error Rate (BER)
►
Received bits
►
Errored bits transmitted
►
Errored bits received
►
Receiver synchronisation on the received sequence
►
Number of elapsed seconds with receiver out of synchronism
►
PASS/FAIL test result according to the configured setting
►
G.821 data: SES (severely errored seconds), DM (degraded minutes), ES
(errored seconds), US (unavailable seconds) in absolute value and
percentage. According to G.821 recommendation
The two threshold acceptability measures (PASS/FAIL), report the FAIL (NOK) value
if the errored bits received ratio exceeds the threshold indicated in the test setup or if
the G.821 parameters exceed the values provided by the recommendation. In case
the
Test Pass/Fail is set with G.821, both results will be identical.
If the instrument detects a remote loop, the second results page will display the round
trip delay value in milliseconds. See § 3.13.3.
In case of an incoming bit error is detected, the instrument
generates an warning sound
3.5.3. Performing an Nx64K BER Test
It is possible to perform a BER test with a band of Nx64Kbps with N programmable
between 1 and 31(G.704) or fixed at 32(G.703), for primary access.
In G.704 mode, the channels used to transmit and receive the PRBS sequence can
be sequential or defined by the user. It Is admitted every channel combination.
With the parameter ‘Band’, you can select the maximum number of channels to be
used, once the link is active it is possible to select each timeslot on which to run the
test. See § 3.3 for further info.
CHAPTER 3 - PERFORMING A MANUAL TEST
59