Nortel Networks 1000 - Manual (Page 115)

Functional description 115
•
CPU initiated card reset
• reporting of card ID (card type and hardware vintage)
• reporting of firmware version
•
reporting of line interface unit configuration
•
enabling/disabling of the DS-30X network loop busy
• reporting of card status
Power interface
Power is provided to the NT1R20 OPS analog line card by the NTAK78
ac/dc or NTAK72 DC power supply.Power is provided to the OPS circuit
card by the NTAK78 AC/DC or NTAK72 DC power supply.
Power is provided to the NT1R20 OPS Analog Line Card by the NTAK78
ac/dc or NTAK72 dc power supply.
The following card functions are described in this section:
• Line interface units
•
Card control functions
• Circuit power
• Software service changes
•
Port-to-port loss configuration
The following card functions are described in this section:
• Line interface units
•
Card control functions
•
Circuit power
• Software service changes
• Port-to-port loss configuration
Line interface units
The NT1R20 OPS analog line card contains eight independently
configurable interface units. Relays are provided in each unit to apply
ringing onto the line. Signal detection circuits monitor on-hook/off-hook
signaling. Two codecs are provided for performing Analog/Digital (A/D)
and Digital/Analog (D/A) conversion of analog voiceband signals to digital
PCM signals.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.