Specifications

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Page 4
Black Box
1. OVERVIEW
This section provides a gerneral list of features and a description of the Black Box
product.
1.1 FEATURES
• Switch-selectable carrier control
• Synchronous or asynchronous operation
• No AC power or batteries required
• Data rates to 38.4 Kbps
• Distances to 12 miles (19.2 km)
• Point-to-point or multipoint operation
• Full or half duplex operation
• Internal, external or received loopback clocking
• V.54 loopback tests and V.52 compliant BER tests
• Automatic equalization
• Easy-to-read status LEDs
• Transformer isolation
• Silicon Avalanche Diode surge protection
1.2 DESCRIPTION
The ME670A carrier controlled short range modem supports synchronous and asyn-
chronous data rates to 38.4 Kbps. Requiring no AC power or batteries, the ME670A
supports distances to 12 miles over unconditioned twisted pair. The ME670A features
front panel LEDs, automatic equalization, V.52 compliant BER tests, both internal and
external clocking and V.54 loopback tests. Built-in transformer isolation and surge pro
-
tection provide protection against ground potential differences and AC/DC over-volt-
ages.
The ME670A is fully compatible with the Black Box Model ME475A-R2. This compati-
bility allows you to combine miniature, standalone and rack mounted modems in a sin-
gle system.