Specifications

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CHAPTER 1: Specifications
Cable Required — For modem-to-modem line: Two- or four-wire
unconditioned twisted-pair, 19 to 26 AWG (see
Appendix A), pinned as shown in Section 4.1.2
Compliance — FCC Part 15 Class A, DOC Class/MDC classe A
Interfaces — Serial: EIA RS-232/ITU-TSS [CCITT] V.24;
Line: Two- or four-wire telco
Protocol — Synchronous or asynchronous
Clock Source — Internal, external (from DTE), or received (from
other Card) (user-selectable)
Data Format — Word length (including start bit, data bits, stop bits,
and parity bit) must equal 8, 9, 10, or 11 bits (user-
selectable)
Flow Control — Transparent to all types of software (X-ON/X-OFF,
robust X-ON/X-OFF, etc.) flow control; can be set
to support hardware flow control
Operating Mode — Two-wire half-duplex or four-wire full- or half-
duplex (user-selectable)
Data Rates — 38.4, 28.8, 19.2, 14.4, 9.6, 7.2, 4.8, 3.6, 2.4, 1.8, or
1.2 Kbps (user-selectable)
Maximum
Distance — See the maximum distance chart in Appendix A
Isolation — 1500 volts RMS minimum using custom transformers
1. Specifications