Nortel-networks Circuit Card Bedienungsanleitung Seite 554

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Page 554 of 906 NT8D09 Analog Message Waiting Line card
553-3001-211 Standard 3.00 August 2005
Card control functions
Control functions are provided by the following:
a microcontroller
a card LAN interface
signaling and control circuits on the analog message waiting line card
Microcontroller
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
Signaling and control
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.
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