GDC - CSU/DSU

GDC - SpectraComm 521A/S SNMP Managed All Rate DSU
The SC521A and SC521A/S DSUs are multi-rate data service units capable of operating in standard Dataphone Digital Service (DDS) mode, DDS with a secondary channel (DDS/SC) mode, 64 kbps Clear Channel mode, and Wireline mode. The DSUs can support DTE data rates of 0.6, 1.8,2.4, 4.8, 9.6, 19.2, 56.0, and 64.0 kbps in full duplex operation over four-wire private lines. Both models of the DSU have the same basic operational capability. The SC521A/S adds a Sealing/Simplex current option which provides a 4mA DC current on the network interface to keep the relay path clean. The SC521A/S also supports a craft interface when installed in a SC5000 shelf. The SC521A and SC521A/S DSUs are a 7-inch by 9.5-inch (178 mm by 241 mm) cards that conforms to all GDC SpectraComm shelf/enclosure systems.

Connects to DDS, DDS with Secondary Channel and 64 kbps Clear Channel
Capable of Point-to-Point, Multi-Point and LDM (wireline) operation
Supports Receive, Internal or External Timing
Capable of Programmable RTS/CTS delays
Provides Circuit Quality Measurements for: Jitter, Receive Level, Transmit Level, Bipolar Violations and Round Trip Delay
Provides DTE Interface status and alarms
SC521A/S capable of providing Sealing/Simplex current
SC521A Diagnostics perform Standard Loopbacks,Telco Loopbacks and V.54
SC521A/S Diagnostics perform Standard Loopbacks, Telco Loopbacks, V.54, and can initiate a CSU Loopback (current reversal)
High or low density rackmount packaging for easy installation in a variety of GDC shelves and enclosures

D A T A S H E E T

SpectraComm 521A/S S/A $940.50 Quantity

SpectraComm 521A/S S/A +24/-48V DC $940.50 Quantity

SpectraComm 521A/S With 530 S/A $1,075.50 Quantity

SpectraComm 521A/S With 530 S/A +24/-48V DC $1,075.50 Quantity

SpectraComm 521A/S With DRA S/A $1,030.50 Quantity

SpectraComm 521A/S With DRA S/A +24/-48V DC $1,030.50 Quantity

GDC - Desktop 500A RS2322/V35 S/A
$675.00
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.

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

D A T A S H E E T

Quantity