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GDC DeskTop
500A DSU
Universal Rate DSU for Branch Offices
Call us for
Pre-sales and discount pricing
301-924-7400 Ext 17 or 18 for Sales
Support
GDC DeskTop 500A DSU
Universal Rate DSU for Branch Offices
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Highlights
• Handles
all digital service speeds from 2.4 to 64 Kbps for greater applications
flexibility
• Automatic data rate and interface selection for simple
service upgrades
• Powerful diagnostic testing capabilities for rapid
fault isolation and system restoral
• Extended dynamic range for the best performance
possible
• Anti-lockup feature for trouble-free clear channel
operation
Description
The DeskTop 500A
(DT-500A) is a universal rate data service unit (DSU) for remote site
locations in digital networks. It supports all standard subrates and both 56
and 64 Kbps (clear channel) high speed rates. Designed for easy
"plug-and-play" operation, the DT 500A simplifies both initial installation
and any future service upgrades. This highly reliable, feature-packed
product combines superior performance with a sleek, compact design that is
perfect for any remote or satellite office environment.
Easy Installation and Maintenance
The DT 500A is configured using simple, clearly marked switches on the
bottom of the unit. The optioning information is contained in a chart placed
next to the option switches. There is no need to wrestle with complicated
prompts or confusing menu trees, or plow through a detailed instruction
manual. The unit can be preconfigured and then delivered to the remote site
for plug-in installation.
Automatic Rate Selection
Service upgrades are virtually transparent to the user -- including upgrades
between subrates and from subrate to 56/64 Kbps operation. The unit
automatically adjusts its operating rate to match the incoming signal and
selects the appropriate V.35 or EIA/TIA-232E interface. There are no bulky
and expensive adapter cables to buy and no need to change the unit's
internal printed circuit board.
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Powerful Diagnostics
The DT 500A includes a variety of features to ensure that system faults are
quickly isolated and resolved. First, the unit can determine whether or not
the transmit and receive pairs of the digital facility have been transposed.
This feature alone will save hours of wasted troubleshooting.
Another unique capability is the Error Free Seconds (EFS)
test, which can be set to run automatically (e.g., overnight). This allows
the user to confirm that the service is performing within telephone company
specifications.
The DT 500A also features three different Remote Digital
Loopback (RDL) tests, ensuring diagnostic compatibility with many other
500-type DSUs. Tests are initiated via dedicated front panel push buttons,
and the results are shown in an easy-to-read Electronic Display Window.
Superior Performance
The DT
500A includes GDC's Extended Dynamic Range feature that assures trouble-free
operation, even over lines with very low signal levels, such as unusually
long subscriber loops. In 64 Kbps clear channel operation, an anti-lockup
feature protects against remote CSU/DSU lockup in permanent loopback -- a
condition caused by data signals that look like in-band loopback command
codes.
The DT 500A incorporates powerful VLSI and microprocessor
technology, so it consumes very little power, resulting in low heat
dissipation and longer component life for many years of reliable
performance. |
Specifications
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COMPATIBILITY
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Fully compliant with Bell Pub. 62310 and ANSI T1.410
standards |
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DATA RATES
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Synchronous: 2.4, 4.8, 9.6, 19.2, 56
and 64 Kbps Asynchronous: 1.2, 1.8, 2.4,
4.8, 9.6, and 19.2 Kbps |
| OPERATING MODE
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Conventional DDS: Full duplex,
point-to-point/multipoint
64 Kbps DDS: Full duplex, point-to-point |
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DATA ENCODING
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Bipolar, return to zero |
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DTE INTERFACE
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ITU-T V.35 at 56 and 64 Kbps; EIA/TIA-232-E at 1.2 to 19.2
Kbps |
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DATA FORMAT
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Synchronous: Binary, serial
Asynchronous: Binary, serial; 8, 9, 10 and 11-bit
characters ( ITU-T V.14 compliant) |
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RTS/CTS DELAY (NOMINAL)
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Normal
2.4 Kbps 8 milliseconds
4.8 Kbps 4 milliseconds
9.6 Kbps 2 milliseconds
19.2 Kbps 1 millisecond
56 Kbps 350 microseconds
64 Kbps N/A
Extended 45 milliseconds |
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LINE REQUIREMENTS
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4-wire, non-loaded metallic circuits |
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LINE IMPEDANCE
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135 ohms (nominal) |
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TRANSMITTER TIMING |
Internal, External or Network Timing |
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POWER REQUIREMENTS
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105-129 VAC, 50/60 Hz, 8 W maximum |
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PHYSICAL CHARACTERISTICS
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Height: 36 mm (1.4 in)
Width: 188 mm (7.4 in)
Depth: 279 mm (11.0 in)
Weight: .35 kg (1.0 lbs)
Shipping Weight: 1.0 kg (2.2 lbs)
Operating Temperature: 0° to 50° C (32° to 122° F)
Humidity: Up to 95% without condensation |
| SAFETY PROTECTION
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ETL Listed for U.S. and Canada |
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Discounts available !!
Please contact us
@
301-924-7400 Ext 17 or 18 for Sales
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