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DSU III DBU

DEDICATED RACKMOUNT DSU/CSU WITH SWITCHED DIAL BACKUP
1200043L1, 1200172L1, 1200046L1, 1200069L1, 1202037L3

The ADTRAN DSU III DBU RM, a high-performance rackmount data channel service unit (DSU/CSU), provides an interface between the digital data service (DDS) and the customers data terminal equipment (DTE) while providing automatic switched dial backup (DBU) of the dedicated circuit. There are four DBU options: 4-wire Switched 56 (SW56), 2-wire SW56, V.34, and 1B+D ISDN. When the DSU III DBU is configured for dedicated service with switched DBU, the user selects options to qualify a dedicated line failure. Upon line failure recognition, the DSU initiates connection to the remote unit over the switched network. Upon restoral of the DDS circuit, the unit automatically or manually reverts to the restored DDS circuit.

The DSU III DBU supports synchronous operations at rates of 2.4, 4.8, 9.6, 19.2, 38.4, 56 and 64 kbps and asynchronous data rates of 2.4, 4.8, 9.6, 19.2, 38.4, and 57.6 kbps. The DTE interface can be selected as either EIA-232 or V.35 for all data rates. Another feature is DTE-to-service rate matching, for dedicated and switched DBU modes. This feature allows slower rate DTE equipment to communicate over a higher speed digital line. In the DBU mode, dialing is accomplished automatically (with stored numbers) or manually.

The DSU III DBU can be configured through the Smart 16/16e shelf controller card from a local/remote VT 100 terminal or from an ADTRAN DATAMATE™. The DSU III DBU can also be configured using AT or V.25 bis commands.

The unit responds to standard loopback commands from the telephone company central office. The front panel LEDs display test status, alarms, and errors during a test and DBU status. Automatic service rate detection and pair reversal detection aid installation.

Features

	Automatic conversion to switched mode upon failure of dedicated service
	Four backup options available: 4-wire SW56, 2-wire SW56, V.34, and 1B+D ISDN
	Synchronous or asynchronous (including 57.6 kbps) modes of operation
	EIA-232 and V.35 DTE interfaces
	DTE-to-service rate matching feature allows slower DTE devices to communicate over higher rate service offerings
	Tail circuit operation support with internal slack data buffer
	Manual and automatic dialing capability
	Auto answer of incoming calls
	Standard 5 year warranty

DSU III DBU APPLICATION EXAMPLE

Product Specifications

OPERATING MODES

	Dedicated DDS
	Dedicated DDS with automatic switched DBU

SWITCHED DIAL BACKUP

	Automatic or manual
	4-wire SW56
	2-wire SW56
	V.34
	ISDN (1B+D)

NETWORK DATA RATES

	Dedicated mode service rates: 2.4, 4.8, 9.6, 19.2, 38.4, 56 and 64 kbps
	Dial backup: Switched 56 (56 kbps), V.34 (2.4/33.6 kbps), ISDN (56/64 kbps)

DTE RATES

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

DTE INTERFACE

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

LINE REQUIREMENTS

Loop transmission parameters as defined in:

	AT&T PUB 62310: Dedicated DDS
	AT&T PUB 41468: SW56

Receiver sensitivity:

45dB @ all rates

Line interface:

RJ-48S, 4-wire, full duplex

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 Temperature

0� to 50� C, (32� to 122� F)

Storage Temperature

20� to 70� C, (4� to 158� F)

Relative Humidity

Up to 95%, non-condensing

PHYSICAL

Dimensions

1." H, 6.75" W, 10.5" D

Weight

1.5 lbs

Power

8 watts

Product Includes: Two 8-pin to 8-pin modular cables and user manual

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

Ordering Information

	DSU III DBU RM (S4W) - 1200043L1
	DSU III DBU RM (V.34) - 1200172L1
	DSU III DBU RM (S2W) - 1200046L1
	DSU III DBU RM (ISDN) - 1200069L1
	DSU III DBU SA (S2W) - 1202037L3

Download this brochure in pdf format.

Immediate price quote - Call 727-398-5252

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Last modified: November 07, 2007