AMERITECH AM8a, Инструкция по эксплуатации

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AM8a Instruction Manual (18-0037) Appendix A – PCM Operations
0037-S0A.L_54 February 10, 2000
A-1
A. METER DISPLAY
This Appendix describes the
PCM
operations, connections, and other supplementary
information for tests on
T1
and
SLC®96
circuits.
A.1 PCM Operations and Data Flow
The PCM operations of the AM8a are controlled by choices in the menus. (Refer to Figures
A-1 through A-4 for an illustration of signal paths and processing within the AM8a.). For
external connections to user's equipment refer to Figure A-5 for monitor, and Figure A-6 for
emulate, or drop and insert (rpt 1 to 2 or rpt 2 to 1). The list of choices follows ("<>"
indicates default selection).
A.1.1 MODE CONFIG Menu Settings
The
IMITATE
parameter will be set to:
•
0 –te/line: AM8a is emulating/monitoring Terminal Equipment. Flashing
events on display are from connected equipment.
•
1 –<switch>: AM8a is emulating/monitoring Switching Equipment. Flashing
events on display are from AM8a itself.
The
MODE
parameter will be set to:
•
0 –emulate: In accordance with
IMITATE
parameter setting, the AM8a sends,
receives, and displays appropriate signals. Unit responds to incoming signals by
returning an appropriate signal.
CAUTION:
Connections to
RX
and
TX
lines must be made in the correct order
when in "rpt 1 to 2" or "rpt 2 to 1" (drop and insert) to avoid "hits"
which would cause
PCM
alarms. Refer to Figure A-6.
•
1 –<monitor>: AM8a will analyze
RX
or
TX
data and is bridged to the
RX
and
TX
path via the user's
MONITOR
jacks. The
IMITATE
parameter will usually be set
to the end of equipment being monitored (Figure A-1 and A-5). The AM8a
must be in monitor when it is connected to
SLC®96
lines.