NTAK93 D-channel handler interface
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Option 11C and 11C Mini
Technical Reference Guide
Faceplate LEDs
NTAK09 1.5 Mb PRI and NTBK50 2.0 MB PRI cards
LEDs are located on the faceplate of the NTAK09 and NTBK50 cards. The
DCH LED is dual-color (red and green), with states represented as follows:
Power consumption
Power consumption is +5V at 750mA; +12V at 5mA; and -12V at 5mA.
Functional description
The main functional blocks of the NTAK93 architecture include the
following.
Microprocessors
One microprocessor handles data transfer between each pair of serial ports
and software, reports the status of each port and takes commands from
software to control the activities of the ports. The microprocessors also do
some of D-channel data processing in DCHI mode.
DMA controller
A Z80A-DMA chip controls the data transfer between local RAM memory
and communication ports. Note that the DMA channels will only be used in
the receive direction (from line to CPU), not in the transmit direction.
Random Access Memory (RAM)
A total of 32K bytes of RAM space for each pair of ports is used as the
communication buffer and firmware data storage.
Table 160
Faceplate LEDs
State
Definition
On (Red)
NTAK93 is equipped and disabled.
On (Green)
NTAK93 is equipped and enabled, but not necessarily established.
Off
NTAK93 is not equipped.
Содержание Meridian 1 Option 11C Mini
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Страница 260: ...Page 260 of 544 The TDS DTR card 553 3011 100 Standard 14 00 January 2002 ...
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Страница 308: ...Page 308 of 544 Meridian Modular Telephones 553 3011 100 Standard 14 00 January 2002 ...
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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 ...
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