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ing a Yellow Alarm. This alarm is sent by
the remote unit or the central office when it
loses the received signal. This indicates the
local unit's transmitted signal is not reach-
ing the remote unit.
Rx Level The Model 2720 displays the
current received signal strength in dB.
There are four level ranges detected:
+2 to –7.5
-7.5 to –15
-15 to –22.5
< -22.5
Valid Interval Count & Current Interval Time
The Valid Interval Count and Current Interval Time display the
number of valid 15 minute intervals in the last 24 hours and the num-
ber of seconds which have elapsed in the current interval, respectively.
The Valid Interval Count saturates at the count of 96 (96 * 15min = 24
hours), while the Current Interval Time rolls over after 900 counts.
When the counter rolls over, it is reset to zero, and the Interval Counter
is incremented by one if the count is less than 96.
Error Counters
These error counters give a second-by-second snapshot of the
link performance. To clear all counters, press the [Backspace] key. If
your keyboard does not have this key, you can press a two-key combi-
nation to affect the same result: Hold down the [Ctrl] key and then
press the [H] key. This will send to the unit the Ctrl-H character, which
is the same as pressing the [Backspace] key.
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