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High-speed Adapter Tau

Discontinued, recommended replacement is: Tau-PCI


High-speed Adapter Tau Features:
  • Two full duplex ports
  • Up to 4 Mbps per channel per direction
  • V.35/RS-232 or RS-530(RS-449)
  • Independent synchronous/asynchronous mode selection per port
  • Full modem control
  • DMA bus master

Cronyx-Tau is a high speed (up to 4 Mbps) ISA Bus Master synchronous/asynchronous multiplexer that allows to connect IBM PC and compatible computers to the modern communication equipment such as HDSL or Fiber Optic modems. Its options include sophisticated interfaces for direct connection to G.703 (2048 kbps) communication channels or E1 Fractional services (see Chapters "Short Range Modems" and "Digital Service Access Devices".)

The key element of Cronyx-Tau is HD64570 controller chip (a product of Hitachi Corp., Japan). Interface options cover RS-232, V.35, RS-530 (RS-449), G.703 (2048 kbps) and E1 standards. The adapter is software-configurable. Only I/O Base Address is jumper selectable.

The Cronyx-Tau software allows to join several physical synchronous communication channels into one logical channel. For example, two channels with data rate 2 Mbps, joined together, will create the logical channel with the overall throughput of 4 Mbps.

There are 7 models of Tau adapter available, supporting different serial interfaces:

Ordering Code Channel 0 Interface Channel 1 Interface
TAU RS-232/V.35 * RS-232/V.35 *
TAU/VR RS-232/V.35 * RS-530 (RS-449)
TAU/R RS-530 (RS-449) RS-530 (RS-449)
TAU/E1 E1 E1/RS-232/V35 **
TAU/E1/R E1 E1/RS-530 (RS-449)


PC Bus Interface
Bus Type ISA, 16 bit
I/O Base Address 200h - 3e0h, Jumper Selectable
I/O Address Space 32 Bytes
Interrupts IRQ 3, 5, 7, 10, 11, 12, 15, Software Selectable
DMA Channels DMA 5, 6, 7, Software Selectable
DMA Transfers Master Mode, Word Bursts
Addressable Memory 16 Mbytes
Serial Interfaces
Data Transfer Rate per direction for each channel simultaneous operation 4 Mbps
Bit Rate Generator Independent per channel
Synchronous Protocol HDLC
Asynchronous Transfer 5-8 Bits/Character, 1/1.5/2 Stop Bits, Parity Bit
Sync Mode Error Detection Cyclic Redundancy Check CRC-16, CRC-CCITT
Async Mode Error Detection Parity bit
Clock Options TXCIN, RXCIN, TXCOUT or ADPLL, Software selectable per channel
Modem Control Signals DTR, DSR, CTS, RTS, CD
Board Size Height: 100 mm, Width: 167 mm
Operating Systems and Protocols
Windows NT PPP
FreeBSD 4.x, 5.x, 6.x
(FreeBSD 7.x is not supported)
PPP, Cisco/HDLC, Frame Relay
Linux PPP, Cisco/HDLC, Frame Relay


Некоторые документы хранятся в формате Adobe® Acrobat® Reader®

PDF  User's Manual in Russian
PDF  Driver Development Kit Manual in Russian
TXT  V.35 cable scheme
TXT  RS-232 cable scheme
PDF Справочник по интерфейсным кабелям Cronyx.

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