Nortel Networks Circuit Card User Manual
Page 536 of 906
NT8D02 and NTDK16 Digital Line cards
the sanity timer every 1.2 seconds. If the timer is not properly serviced, it
times out and causes the microcontroller to be hardware reset.
times out and causes the microcontroller to be hardware reset.
Circuit power
The +15 V dc input is regulated down to +10 V dc for use by the digital line
interface circuits. The ±15.0 V dc inputs to the card are used to power the loop
interface circuits.
interface circuits. The ±15.0 V dc inputs to the card are used to power the loop
interface circuits.
Electrical specifications
This section lists the electrical characteristics of the NT8D02 Digital Line
card.
card.