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NTAK93 D-channel handler interface
553-3011-100
Standard 14.00
January 2002
Read Only Memory (ROM)
A total of 32K bytes of ROM space for each pair of ports is reserved as a code
section of the DCH-PORT firmware.
LAPD Data Link/Asynchronous Controller
One chip controls each pair of independent communication ports. It performs
the functions of serial-to-parallel and parallel-to-serial conversions, error
detection, frame recognition (in HDLC) function. The parameters of these
functions are supplied by the DCH-PORT firmware.
Counter/Timer controller
Two chips are used as real-time timers and baud-rate generators for each pair
of communication ports.
Software interface circuit
This portion of the circuit handles address/data bus multiplexing, the
interchange of data, commands, and status between the on board processors
and software. It includes transmit buffer, receive buffer, command register,
and status register for each communication channel.
DPNSS/DCHI Port
The mode of operation of the DCH-PORT is controlled by a switch setting on
the NTAK09/NTBK50. For DPNSS the switch is ON; for DCHI it is OFF.
The port will operate at:
The address of ports is selected by hardwired backplane card address.
Port characteristics and LAPD parameters are downloaded from
software.
Data Rate
56kbps, 64kbps
Duplex
Full
Clock
Internal / External
Interface
RS422
Содержание Meridian 1 Option 11C Mini
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Страница 8: ...Page 8 of 544 Contents 553 3011 100 Standard 14 00 January 2002 ...
Страница 10: ...Page 10 of 544 About this guide 553 3011 100 Standard 14 00 January 2002 ...
Страница 86: ...Page 86 of 544 Memory Storage and CPU capacity 553 3011 100 Standard 14 00 January 2002 ...
Страница 176: ...Page 176 of 544 Transmission parameters 553 3011 100 Standard 14 00 January 2002 ...
Страница 196: ...Page 196 of 544 Spares planning 553 3011 100 Standard 14 00 January 2002 ...
Страница 226: ...Page 226 of 544 System Controller cards 553 3011 100 Standard 14 00 January 2002 ...
Страница 260: ...Page 260 of 544 The TDS DTR card 553 3011 100 Standard 14 00 January 2002 ...
Страница 282: ...Page 282 of 544 M2317 Telephone 553 3011 100 Standard 14 00 January 2002 ...
Страница 308: ...Page 308 of 544 Meridian Modular Telephones 553 3011 100 Standard 14 00 January 2002 ...
Страница 312: ...Page 312 of 544 M3900 telephone series 553 3011 100 Standard 14 00 January 2002 Figure 40 M3901 Figure 41 M3902 ...
Страница 364: ...Page 364 of 544 M2250 Attendant Console 553 3011 100 Standard 14 00 January 2002 ...
Страница 368: ...Page 368 of 544 NT8D02 and NTDK16 Digital Line Cards 553 3011 100 Standard 14 00 January 2002 Figure 55 NTDK16 DLC ...
Страница 388: ...Page 388 of 544 NT8D14 Universal Trunk Card 553 3011 100 Standard 14 00 January 2002 ...
Страница 408: ...Page 408 of 544 NT5K21 XMFC MFE card 553 3011 100 Standard 14 00 January 2002 ...
Страница 414: ...Page 414 of 544 NTAG26 XMFR card 553 3011 100 Standard 14 00 January 2002 ...
Страница 422: ...Page 422 of 544 NT6D71 UILC line card 553 3011 100 Standard 14 00 January 2002 ...
Страница 438: ...Page 438 of 544 NT1R20 Off Premise Station OPS analog line card 553 3011 100 Standard 14 00 January 2002 ...
Страница 492: ...Page 492 of 544 NTAK79 2 0 Mb PRI card 553 3011 100 Standard 14 00 January 2002 ...
Страница 512: ...Page 512 of 544 NTAK20 clock controller 553 3011 100 Standard 14 00 January 2002 ...
Страница 518: ...Page 518 of 544 NTAK93 D channel handler interface 553 3011 100 Standard 14 00 January 2002 ...
Страница 544: ...Page 544 of 544 Index 553 3011 100 Standard 14 00 January 2002 ...
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