Specifications

4
MULTI-FUNCTION LINE DRIVER
2.1 Overview
The Multi-Function Line Driver (MFLD) is a carrier-controlled short-range
modem that requires no AC power or batteries. The MFLD operates across
two wires (half-duplex) or four wires (full- or half-duplex), communicating
with DTEs synchronously or asynchronously, up to a maximum range of
12 miles (19.3 km). You can set the MFLD to any of twelve data rates from
1.2 to 38.4 Kbps.
Multi-Function Line Drivers always communicate with each other
synchronously. When connected to an asynchronous RS-232 device, an MFLD
performs synchronous↔asynchronous conversion.
The Multi-Function Line Driver has several features that enhance its overall
performance, including automatic equalization, transformer isolation, and
Silicon Avalanche Diode surge protection. The MFLD also has strong
diagnostics: It features V.52-compliant bit-error-rate (BERT) pattern tests
and two V.54 test modes.
The Multi-Function Line Driver is housed in an ABS plastic case and comes
with either a male or a female DB25 connector and either an RJ-11 jack, an
RJ-45 jack, or a terminal block with strain relief.
2.2 Features
• Convenient rack-card design
• Synchronous or asynchronous communication
• Data rates up to 38.4 Kbps, distances up to 12 miles (19.3 km)
• 2-wire/half-duplex or 4-wire/full- or half-duplex operation
• Internal, external, or received loopback clocking
• Hardware or software flow control
• Automatic equalization and gain control
• Built-in transformer isolation and high-speed surge protection
• V.52 and V.54 test modes
2. Introduction