Functional description
The
NT8D09
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 NT8D09 Analog Message Waiting Line card also provides:
• 600 ohms balanced terminating impedance
• analog-to-digital and digital-to-analog conversion of transmission and reception signals
for 16 audio phone lines
• transmission and reception of Scan and Signaling Device (SSD) signaling messages over
a DS-30X signaling channel in A10 format
• on-hook/off-hook status and switchhook flash detection
• 20 Hz ringing signal connection and automatic disconnection when the station goes off-
hook
• synchronization for connecting and disconnecting the ringing signal to zero crossing of
ringing voltage
• loopback of SSD messages and Pulse Code Modulation (PCM) signals for diagnostic
purposes
• correct initialization of all features at power-up
• direct reporting of digit dialed (500-type telephones) by collecting dial pulses
• connection of –150 V DC at 1 Hz to activate message waiting lamps
• lamp status detection
• disabling and enabling of selected units for maintenance
Figure 100: Analog message waiting line card - block diagram
on page 367 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.
NT8D09 Analog Message Waiting Line card
366 Circuit Card Reference
July 2011
Summary of Contents for 1000 Series
Page 1: ...Circuit Card Reference Nortel Communication Server 1000 7 0 NN43001 311 04 04 July 2011 ...
Page 20: ...20 Circuit Card Reference July 2011 ...
Page 30: ...Introduction 30 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 116: ...Option settings 116 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 143: ...Figure 25 CP PIV card front Physical description Circuit Card Reference July 2011 143 ...
Page 148: ...NT4N39AA CP Pentium IV Card 148 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 287: ...Figure 86 Clock Controller Option 3 Operation Circuit Card Reference July 2011 287 ...
Page 302: ...NT5K21 XMFC MFE card 302 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 346: ...NT6D80 MSDL card 346 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 353: ...Figure 96 NTDK16 DLC Functional description Circuit Card Reference July 2011 353 ...
Page 461: ...Figure 147 Paging trunk operation Applications Circuit Card Reference July 2011 461 ...
Page 462: ...NT8D15 E and M Trunk card 462 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 500: ...NTAK09 1 5 Mb DTI PRI card 500 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 512: ...NTAK10 2 0 Mb DTI card 512 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 534: ...NTAK79 2 0 Mb PRI card 534 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 550: ...NTBK22 MISP card 550 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 560: ...NTBK50 2 0 Mb PRI card 560 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 595: ...Figure 165 MGC block diagram Introduction Circuit Card Reference July 2011 595 ...
Page 662: ...NTRB21 DTI PRI DCH TMDI card 662 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 668: ...NTVQ01xx Media Card 668 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 700: ......