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DSU III S4W

SWITCHED 56 DSU/CSU

The ADTRAN DSU III S4W is a technologically advanced, high-performance data service unit/channel service unit (DSU/CSU). It provides an interface between 4-wire Switched 56 and the customer's data terminal equipment (DTE). The unit supports both synchronous and asynchronous data rates. Synchronous rates supported are 2.4, 4.8, 9.6, 19.2, 38.4, and 56 kbps. Asynchronous data rates are provided from 2.4 to 38.4 kbps and 57.6 kbps. Both EIA-232 and V.35 DTE interfaces are provided for all data rates.

Dialing is accomplished either manually (invoking one of the stored numbers) or automatically. Dialing over the DTE interface is supported by AT commands or V.25 bis in-band dialing. A separate DB-25 connector is provided for EIA-366 parallel dialing.

Additional features of the DSU III S4W include a DTE-to-service rate matching feature, for both switched and dedicated modes, which allows slower rate DTE equipment to communicate over a higher speed digital line.

The unit responds to standard loopback commands from the service provider and provides extensive test capabilities such as V.54 remote loopback. Included are 2047 and 511 BERT test patterns along with four DDS stress patterns (results of which are displayed on a two-line by 16-character LCD display and seven LEDs).

The front panel keypad of the standalone unit operates a simple menu structure which accesses setup, selection of test modes, local and remote configuration, manual dialing or automatic dialing from stored numbers. Configuration is also accomplished using AT commands. The rackmount version is configured using the Smart 16/16e Shelf controller card connected to either the ADTRAN Datamate unit or a locally or remotely attached VT 100 terminal.

Features

	4-wire Switched 56
	Manual, automatic, AT commands, V.25 bis, EIA-366, or stored number dialing capability
	Standalone or Smart 16/16e rackmount versions
	Synchronous or asynchronous (including 57.6 kbps) modes of operation
	Both EIA-232 and V.35 DTE interfaces
	EIA-366 dialing interface
	DTE-to-service rate matching feature allows slower DTE devices to communicate over higher speed SW56 service offerings
	Supports tail circuit operation with internal slack data buffer
	Auto answer of incoming calls
	Non-volatile storage of frequently called numbers
	Standard 5-year warranty

DSU III S4W APPLICATION EXAMPLE

DSU III S4W REAR PANEL

Product Specifications

OPERATING MODE

4-wire Switched 56 (SW56)

NETWORK RATES

Switched mode service rate: 56 kbps

DTE RATES

	DTE rates to match service rates
	DTE-to-loop rate matching in both dedicated and switched modes
	Synchronous rates: 2.4, 4.8, 9.6, 19.2, 38.4, & 56
	Asynchronous rates: 2.4, 4.8, 9.6, 19.2, 38.4, and 57.6 kbps

DTE INTERFACES

	Both EIA-232 and V.35 electrical and physical DTE interfaces
	EIA-366/232 dialport

DATA BUFFERINGS

Internal slack buffer

SWITCHED MODE DIALING OPTIONS

	Stored number
	Front panel keypad
	DTR dialing of stored number
	In-band AT commands
	V.25 bis (SDLC) in-band dialing

LINE REQUIREMENTS

Loop transmission parameters as defined in: AT&T PUB 41468: Switched 56

LINE INTERFACE

RJ-48S

RECEIVER SENSITIVITY

-45 dB at all rates

AGENCY APPROVALS

	FCC Part 15, Class A and Part 68
	UL & CUL

DIAGNOSTICS

	Network: CSU and DSU loopbacks
	User: Local DTE and loop, remote V.54
	Test Patterns: 2047, 511, DDS, Stress Patterns 1-4

ENVIRONMENT

	Operating: 0 to 50� C (32 to 122� F)
	Storage: -20 to 70� C (-4 to 158� F)
	Relative Humidity: Up to 95%, non-condensing

PHYSICAL

Dimensions

	Standalone: 2.25" H, 8.75" W, 10.25" D
	Rackmount: 1.00" H, 13.50" W, 10.50" D

Weight

	Standalone: 3 lbs
	Rackmount: 1.5 lbs

Power

Standalone: 115 VAC, 60 Hz, 8 watts

Product Includes: two 8-pin to 8-pin modular cable, modular to female DB-25 adapter & User Manual

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

Ordering Information

	DSU III S4W - 1202013L1
	DSU III S4W rackmount - 1200042L1

Download this brochure in pdf format.

Immediate price quote - Call 727-398-5252

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Last modified: November 07, 2007