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Specifications subject to change without notice. ADTRAN and ISU are trademarks of
ADTRAN, Inc., 5ESS is a registered trademark of Lucent, DMS-100 is a trademark of
Northern Telecom, Windows is a registered trademark of Microsoft Corporation. All other
registered trademarks and trademarks mentioned in this publication are the property of
their respective owners.

Product Specifications

Network Interface

■ 

RJ-45 for ISDN Basic Rate 

U-Interface or S/T-Interface

DTE Interface

■ 

Two DB-25:

each RS-530A/EIA-232 interfaces

■ 

V.35 interfaces available with RS-530A/

EIA-232-to-V.35 adapters

Dialing Selections

■ 

Dial Interfaces:

two RS-366 interfaces 

■ 

In-band DTE dialing:

V.25 bis or AT commands

■ 

Manual or automatic stored number dialing

■ 

DTR assertion

Switch Compatibility

■ 

Lucent 5ESS, NTI DMS-100, NEC

■ 

National ISDN-1

Diagnostics and Testing

■ 

Local and remote loopbacks

■ 

CCITT V.54 Loopback

■ 

Remote configuration

Data Rates (DTE)

■ 

Using single DTE interface:

1200 bps to 115.2 kbps asynchronous
2400 bps to 128 kbps synchronous

■ 

Dual DTE Interfaces

1200 bps to 57.6 kbps asynchronous
2400 bps to 64 kbps synchronous

Data Rates (Network)

■ 

64 kbps (1 B channel)

■ 

128 kbps (2 B channels)

Protocols

■ 

CCITT V.120, T-LINK, SAP, Clear Channel, 

DSU 57.6 Async, BONDING Mode 1, Fallback,
Async to Sync PPP, RFC1717 Multilink PPP

ISU 2x64

Dual Port ISDN Service Unit

ADTRAN, Inc.

Attn: Enterprise Networks

901 Explorer Boulevard

Huntsville, AL   35806

P.O. Box 140000

Huntsville, AL 35814-4000

256 963-8000 voice

256 963-8699 fax

256 963-8200 fax back

General Information

800 9ADTRAN

[email protected]

www.adtran.com 

Pre-Sales 

Technical Support

800 615-1176 toll-free

[email protected]

www.adtran.com/support

Where to Buy

877 280-8416 toll-free

[email protected]

www.adtran.com/where2buy

Post-Sales 

Technical Support

888 423-8726

[email protected]

www.adtran.com/support

ACES Installation &

Maintenance Service

888 874-ACES

[email protected]

www.adtran.com/support

International Inquiries

256 963 8000 voice

256 963-6300 fax

[email protected]

www.adtran.com/international

For the regional office 

nearest you, visit:

www.adtran.com/where2buy

Interoperability

■ 

BONDING compatible inverse multiplexers 

■ 

Switched 56 DSUs, ISUs, ISDN TAs, and PPP-

compatible routers

Environmental

■ 

Operating Temperature:

0° to 50°C, 32° to 122°F

Storage Temperature:

-20° to 70°C, -4° to 158°F

■ 

Relative Humidity:

Up to 90%, non-condensing

Physical

■ 

Dimensions 

Standalone: 

2.25" H, 7.5" W, 10" D

■ 

Weight

Standalone:

3.6 lbs

■ 

Power

115 vAC, 60 Hz,
8 watts max dissipation

Product Includes

■ 

ISU 2x64

■ 

7 foot telephone cable (RI45 to RI11)

■ 

User Manual

Ordering Information

Equipment

Part #

ISU 2x64 U-Interface, 115 vAC

1200051L1

S/T-Interface, 115 vAC

1200051L2

RS-530 to V.35 adapter cable

1200072L1

Printed in the U.S.A.

61200051L1-8F April 2002

©2002 ADTRAN, Inc. All rights reserved.

ADTRAN is a 

TL 9000 registered company.

ADTRAN is a 

ISO 9001 registered company.

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