Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

 NT8D09 Analog Message Waiting Line card

Control functions are provided by the following:

•

a microcontroller 

•

a card LAN interface

•

signaling and control circuits on the analog message waiting line card

The analog message waiting 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 CP 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 codecs

— enabling/disabling of individual units or entire card

— programming of input/output interface control circuits for 

administration of line interface unit operation

— enabling/disabling of an interrupted dial tone to indicate call waiting

— maintenance diagnostics

— transmission loss levels

The signaling and control portion of the card provides circuits that establish, 
supervise, and take down call connections. These circuits work with the 
system CP to operate the line interface circuits during calls. The circuits 
receive outgoing call signaling messages from the CP and return incoming 
call status information over the DS-30X network loop.