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182 NT5D11 and NT5D14 Lineside T1 Interface cards
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.
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.
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:
— converts on/off-hook, and ringer control messages from the DS-30X
loop into A/B bit manipulations for each time slot in the T1 data
stream, using robbed bit signaling.
•
the front panel LED when the card is enabled or disabled by instructions
from the NT8D01 controller card.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.