AM8a Instruction Manual (18-0037) Meter Display
0037-S06.L_43 February 10, 2000
6-15
The user may align the indicators by pressing [SHIFT] then [CANCEL] for better comparison.
This display is also used for Drop & Insert (Rpt 1 to 2 or Rpt 2 to 1) testing.
6.10 PCM 1 OR PCM 2 TX OR RX A/B MEASURE
This display provides a view of the signaling bits of all 24 time-slots for both the transmit
and receive T1 and SLC®96 I (Mode I) Spans.
CAUTION: This display is only valid when the AM8a is in MONITOR mode. Readings
are meaningless in EMULATE mode.
TX A B
RX A B
• • • • • •
• • • • • •
An A-bit or B-bit indication, shown by a shaded rectangle, means that the time-slot is active.
Time-slot 01 is the bit to the far left and time-slot 24 is to the far right of the display.
Dots are displayed in all bit positions (shown for illustration only in slot 7-12 locations) if the
AM8a is in an invalid mode for this display.
This display is useful for locating an idle voice channel before running Drop & Insert tests.
Select a time-slot which displays inactive status in monitor mode before the selection of
emulate mode to run the test (Rpt 1 to 2 or Rpt 2 to 1).
6.10.1 T1 Time-Slot to Voice Channel Assignment: For T1 spans, the time-slot is equivalent to
the channel number. This display is not used for SLC®96 Mode II.
6.10.2 SLC®96 Mode I Time-Slot to Voice Channel Assignment: Refer to Figure 6-5 for the
assignment of voice channels to time slots for SLC®96 Mode 1.
6.10.3 SLC®96 Mode II Time-Slot to Voice Channel Assignment: The TX or RX A/B Measure
display is not useful for SLC®96 Mode II. Assignment of Time-Slots to Voice
Channels is dynamic in SLC®96 Mode II. To determine which voice channel is active,
refer to the Concentrator Field Message (a and b events) which can be monitored on
the data link (CHAN=–97). For further details refer to Sections 1.2.2, 2.5.3, and
2.5.4.
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