FHL-7121 X.21 SDLC Adapter

OVERVIEW

The Fraser's Hill FHL-7121 SDLC Adapter is a low cost, high performance, single channel, synchronous and asynchronous, multiprotocol X.21 serial communications coprocessor adapter card for IBM and compatible personal computers.

• Standard XT height 2/3 length (8.25 inch) ISA card.
• Intel or AMD 80C186 10, 12, 16, or 20 MHz microprocessor.
• Zilog Z85230 8, 10, 16, 20 MHz serial communications controller.
• 64 kilobytes to 1 megabyte static RAM, fully addressable from the PC through two 16 kilobyte windows.
• One CCITT X.21 port, synchronous or asynchronous, with data rates up to 64000 bps.
• Synchronous mode supports: SDLC, HDLC, Bisync, or Monosync protocols; NRZ, NRZI, FM0, or FM1 data encoding.
• Asynchronous mode supports: 5, 6, 7, or 8 data bits; 1, 1.5, or 2 stop bits; odd, even, or no parity.
• Bidirectional software controlled interrupts between host PC and 80186 microprocessor.
• Two on-board DMA channels to increase performance.
• User configurable memory window addresses, I/O addresses, and IRQ level.
• Built-in null modem with synchronous clocking.
• Communications protocols, such as SDLC or X.25, can be implemented entirely on the adapter card, with a high level software interface to PC application and terminal emulation programs.

ORDERING INFORMATION

• adapter part number 7121A21 (maximum line speed 64K bps)
• adapter part number 7121C31 (maximum line speed 512K bps)
• cable part number 3121010 (10 feet / 3 meters)

Please contact Fraser's Hill Ltd. or one of its distributors for more information.