Nortel Networks 1000 - Manual (Page 432)

432 NT8D02 and NTDK16 Digital Line cards
The microcontroller also controls the front panel LED when the card is
enabled or disabled by instructions from the NT8D01 controller card.
Microcontroller
The NT8D02 Digital Line Card contains a microcontroller that controls the
internal operation of the card and the serial card LAN link to the controller
card. The microcontroller controls the following:
• reporting to the CE Call Processor through the card LAN link:
— card identification (card type, vintage, and serial number)
— firmware version
— self-test status
— programmed configuration status
• receipt and implementation of card configuration:
— programming of the digital line interfaces
— enabling/disabling of individual units or entire card
— programming of loop interface control circuits for administration of
line interface unit operation
— maintenance diagnostics
The microcontroller also controls the front panel LED when the card is
enabled or disabled by instructions from the NT8D01 controller card.
Card LAN interface
Maintenance data is exchanged with the common equipment Call Server
over a dedicated asynchronous serial network called the Card LAN link.
Maintenance data is exchanged with the common equipment CP over
a dedicated asynchronous serial network called the Card LAN link. The
Card LAN link is described in the section
“Intelligent Peripheral Equipment”
(page 21) .
Maintenance data is exchanged with the common equipment Call
Processor over a dedicated asynchronous serial network called the Card
LAN link.
Sanity timer
The NT8D02 Digital Line card also contains a sanity timer that resets the
microcontroller if program control is lost. The microcontroller must service
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.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.