Nortel Networks DCT1900 User Manual

Page 359

Technical Product Manual - DCT1900

Maintenance, Test and Maintenance Software

Maint-DCT1900/R8/mw

2-9

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

: increments at every power on.

Watch–dog reset

: increments at every unexpected CPU watch–dog reset.

Relative Counters:
HSCX reset

: increments at every HSCX reset.

HDLC A reset

: increments at every HDLC A reset.

HDLC B reset

: increments at every HDLC B reset.

8031 (BC) reset

: increments at every 8031 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

: increments on all type of resets, see Table 2–1.

Relative Counter

: increments at error (T&M reset/BC), increments at board insertion

(backplane reset).

Counters for Peripherals
The CPU has the following counters for peripherals:
Relative Counter

: increments at error (T&M reset/P).