Nortel Networks Circuit Card 311 - Manual (Page 542)

542 NT8D09 Analog Message Waiting Line card
Figure 135 "Analog message waiting line card - block diagram" (page
543)
shows a block diagram of the major functions contained on the analog
message waiting line card. Each of these functions are described in the
following sections.
Figure 136 "Analog message waiting line card - block diagram" (page
544)
shows a block diagram of the major functions contained on the analog
message waiting line card. Each of these functions are described in the
following sections.
The analog message waiting line card contains a microprocessor that
provides the following functions:
• self-identification
• self-test
• control of card operation
• status report to the controller
• maintenance diagnostics
The analog message waiting line card also provides:
• 600-ohm balanced terminating impedance
• analog-to-digital and digital-to-analog conversion of transmission and
reception signals for 16 audio phone lines
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.