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Page 6
Black Box Short Range Modem
The ME475A-R2 features V.52 compliant bit error rate pattern tests and two V.54 test
modes: local analog loopback and remote digital loopback. The operator at the local
end may test both local and remote modems, plus the line, in the digital loopback
mode. Both RDL and LAL modes can be controlled by a manual switch or via the
V.24/RS-232 interface.
2. CONFIGURATION OVERVIEW
The ME475A-R2 is fairly simple to install and is ruggedly designed for excellent reli-
ability: just set it and forget it. The following instructions will help you set up and install
the ME475A-R2 properly.
2.1 CONFIGURATION SWITCHES
The ME475A-R2 uses a unique set of 24 external mini DIP switches that allow config-
uration to an extremely wide range of applications. These 24 DIP switches are
grouped into three eight-switch sets, and are externally accessible from the underside
of the unit (see Figure 1). Since all configuration DIP switches are externally accessi-
ble,
there is no need to open the case for configuration
.
The configuration switches allow you to select data rates, clocking methods, V.52 &
V.54 tests, word lengths, extended signaling rates, async. or sync. mode, 2- or 4-wire
operation, anti-stream control and input impedance. The drawings, text and tables on
the following pages describe all switch locations, positions and functions.
Figure 1.
Underside of ME475A-R2, showing location of DIP switches
1
2
3
4
5
6
7
8
ON
1
2
3
4
5
6
7
8
ON
1
2
3
4
5
6
7
8
ON
FRONT
REAR
S1
S2
S3
ON
OFF
Summary of Contents for ME475A-R2
Page 1: ...ME475A R2 Async Sync Short Haul Modem...
Page 32: ...ME475A R2 version 1...
