Nortel DCT1900 Technical Product Manual page 359

Relative Counters
A relative counter counts all resets since the power–on. The counter is cleared each time the
power is cycled or at a CPU reset (button or watch–dog). Relative counters have a threshold level.
When the threshold level is exceeded, a general alarm with fault code 3 is generated. Relative
counter values are halved every 24 hours.
Counters for CPU
The CPU board has the following counters for CPU circuits:
Absolute Counters:
Power On reset
Watch–dog reset
Relative Counters:
HSCX reset
HDLC A reset
HDLC B reset
8031 (BC) reset
Note:
HSCX = High Level Serial Controller Extended
HDLC = High Level Digital Link Control
Counters for Board Controllers
The CPU has the following counters for Board Controllers:
Absolute Counter
Relative Counter
Counters for Peripherals
The CPU has the following counters for peripherals:
Relative Counter
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: increments at every power on.
: increments at every unexpected CPU watch–dog reset.
: increments at every HSCX reset.
: increments at every HDLC A reset.
: increments at every HDLC B reset.
: increments at every 8031 reset.
: increments on all type of resets, see Table 2–1.
: increments at error (T&M reset/BC), increments at board insertion
(backplane reset).
: increments at error (T&M reset/P).
Technical Product Manual - DCT1900
Maintenance, Test and Maintenance Software
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