Specifications

Watson-TDM-Manual-W.doc
Version 2.0-01
Watson TDM
Operating Manual
Revision: 2008-02-07 8-27
RESETG826 [ ALL ]
The RESETG826 command resets the G.826 error performance parameters back
to zero. Both DSL and E1 G.826 counters are reset with the RESETG826 com-
mand.
RESETG826 ALL will reset all G.826 statistics of an entire link, i. e. the statistics
of STU-C, STU-R and any regenerators that might be present on the link.
8.4.2 Bit Error Rate Tests
STARTBER m dir p
The STARTBER m dir p command starts the pseudo random binary sequence
(PRBS) generator and bit error rate (BER) meter for a duration of m minutes.
The test signal generator sends a PRBS of length 2
15
-1 according to ITU-T O.151
(p = 0) or a PRBS of length 2
11
-1 according to ITU-T O.152 (p = 1).
The PRBS is sent towards the remote modem (dir = 0), towards the first user
interface (dir = 1) or towards the second user interface (dir = 2, Multiservice
only).
When no parameter is specified, the default values are m = 24 hours, dir = 0
and p = 0.
When running a BER test with dir = 0, an external hardware loop must be es-
tablished at the user interface of the remote modem (loopback connector).
Selecting dir = 3 will start an internal DSL bit error rate test which is independ-
ent of the user interfaces. A loopback with LOOP2 on a regenerator or the remote
modem must be established in this case. Make sure that the DSL link is running
before starting the internal BER test. If the DSL link fails during the internal BER
test, the test must be restarted after the link is re-established.
The test will be stopped automatically after m minutes; a manual stop is possible
with the STOPBER command. The results of the BER test can be displayed by the
READBER command.
LTU_01_PM>STARTBER 3
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BER Test Results Test running
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Test direction : SHDSL
Test interval : 180
Test pattern : 2^15-1
Test bitrate : 1984000
Bit errors : 0
Bit error rate : 0.00E+00
Sync loss seconds : 0
Elapsed seconds : 6
Notes:
• The STARTBER command is not available when the NTU E1 interface is in
PRA modes
• In Multipoint configurations the test with dir = 1 is only available on sys-
tems with dedicated E1 interfaces, i. e. on system 1 and 3