Nortel Networks DCT1900 manual Relative Counters, Counters for CPU, Counters for Board Controllers

Technical Product Manual - DCT1900

Maintenance, Test and Maintenance Software

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).

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