64, 56, 19.2, 9.6, 4.8, 2.4 and
1.2 kbps over
DDS point-to-point and multipoint applications.
UDS DDSMR1 DSU/CSU
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Direct
connect compatibility for 64, 56,19.2, 9.6, 4.0, 2.4 and 1.2 kbps
Compatible
with Bell 500A and 500B DSU
Interchangeable
EIA RS232-C, CCITT V.35, or EIA RS-530/RS449 type DTE interfaces
Provides
simple configuration of options and diagnostics through front panel
push buttons and LCD display
Automatic
line equalization
Synchronous
data format for 64 and 56 kbps operation
Synchronous
or asynchronous data formats available for 19.2, 9.6, 4.3, 2.4, and
1.2 kbps
Externally-clocked
transmit data buffering for use in tail circuit applications
Integral
diagnostics
Universal
Data Shelf compatible
|
The UDS DDS/MR1 is a
multi-rate DSU/CSU. It provides data transfer at rates from 1.2 up to 64 kbps
over the DDS network. The model combines the functions of a Data Service Unit
with the functions of a Channel Service Unit.
Description
Designed
for use on the Digital Data Service (DDS) network, the UDS DDS/ MR1 combines the
functions of the Data Service Unit (DSU) with the Channel Service Unit (CSU)
into a single compact unit. The DDSMR1 complies with the requirements specified
in Bell publications 62310 and 41450 and is compatible with the UDS D56 and
D19.2. The model provides full duplex, serial communications at 64, 56, 19.2,
9.6, 4.8, 2.4 and 1.2 kbps over 4-wire unloaded twisted-pair cable systems and
DDS point-to-point and multipoint applications. The model also functions as a
limited distance modem with the distance between units being a function of the
data rate and wire size.
Installation of the DDS/MR1 is
simplified by the integral CSU which provides the necessary equalization and
line conditioning. A DB-25 type connector is used to connect the data terminal
equipment to the DDS/MR1. If the model is equipped with CCITT V.35 interface
circuitry, an optional external adapter module provides a 34 pin V.35 connector.
The ten character liquid
crystal display (LCD) front panel of the DDS/MR1 allows simplified option
configuration and diagnostic testing. The LCD
display and LEDs
provide the user with data rate, test information, and network status. Once the
unit has been configured and the settings saved in non-volatile memory, the
front panel can be disabled using a hard strap located on the printed circuit
board. With the front panel disabled, the user can only view the current
settings and tests can be initiated only through the DTE port
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Industrial grade CSU/DSU
ARC ELECTRONICS
301-924-7400 EXT 25
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