Card control functions, Microcontrollers – Nortel Networks 1000 User Manual

Page 173

Functional description

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calls. The circuits receive outgoing call signaling messages from the
controller and return incoming call status information to the controller over
the DS-30X network loop.

The Lineside T1 card also contains signaling and control circuits that
establish, supervise, and take down call connections. These circuits work
with the system controller to operate the T1 line interface circuit during
calls. The circuits receive outgoing call signaling messages from the
controller and return incoming call status information to the controller over
the DS-30X network loop.

Card control functions

Control functions are provided by a microcontroller and a Card LAN link on
the Lineside T1 card. A sanity timer is provided to automatically reset the
card if the microcontroller stops functioning for any reason.

Microcontrollers

The Lineside T1 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 CPU via the card LAN link:

—

card identification (card type, vintage, serial number)

—

firmware version

—

self-test results

—

programmed unit parameter status

•

receipt and implementation of card configuration:

—

control of the T1 line interface

—

enabling/disabling of individual units or entire card

—

programming of loop interface control circuits for administration of
channel operation

—

maintenance diagnostics

•

interface with the line card circuit:

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

02.06

Standard

27 August 2008