S O L U T I O N F E A T U R E S

● Reliable, cost-effective dial back-up solution

● Rates from 56k to T1

● Field-upgradable

● Modular platform

● Provided by the industryDSU leader

● Solutions for any size network

Any business can experience temporary network downtime as a result of unex-pected events such as fire, flood or simple technician error. For recovery fromsuch a disaster on a dedicated wide area network, ADTRAN provides a variety ofsolutions.

Point-toPoint ApplicationAs illustrated in the diagram, the DSU IV ESP™ (56/64 kbps DSU/CSU) or the TSUESP (FT1/T1 DSU/CSU) connects LAN traffic from Site 1 to Site 2. If a problemdevelops in the primary circuit, the DSU will sense a failure, and automaticallyinitiate a call using the dial back-up card. These products support backup viaISDN, Switched 56, or analog (DSU IV ESP only) circuits.

Integrated Access ApplicationFor customers with multiple data services (such as video and LAN traffic) on asingle T1, avoiding downtime is critical. In this diagram, the company uses anADTRAN TSU 600e multiplexer with an Nx56/64 dial backup card and a TSU120e multiplexer with built in dial backup functionality to protect the network. Ifthe primary line is lost, the units initiate dial backup through an ISU 512e, whichBONDs up to four BRI lines to achieve a backup bandwidth of 512 kbps.

TSU 600e

ISDN

TSU 120e

1 DEF

4GHI

MNOJKL

ABC

QUICK

PQRSTUV

WXYZ

TSU 120e

CS TD RD CD TR

RS

SR

7

2

5

8

0#

3

6

9

T1

Ethernet LAN Ethernet LAN

ISU 512e

1 DEF

4GHI

MNOJKL

ABC

QUICK

PQRSTUV

WXYZ

ISU 512

CS TD RD CD TR

RS

SR

7

2

5

8

0#

3

6

9

Up to 4 BRIs

V.35 DCE

V.35 DTE

1 DEF

4GHI

MNOJKL

ABC

QUICK

PQRSTUV

WXYZ

ISU 512

CS TD RD CD TR

RS

SR

7

2

5

8

0#

3

6

9

Up to 4 BRIs

ISU 512e

V.35 DCE

V.35 DTE

Video-ConferenceEquipment

Video-ConferenceEquipment

Router

V.35Network T1

Router

V.35

POINT-TO-POINT APPLICATION

INTEGRATED ACCESS APPLICATION

DSU IV/TSU ESP DSU IV/TSU ESP

orT1

orT1

ISDN4w SW56

V.34 (DSU only)Site A Site B

FeaturingDSUs, TSUs & ISUsDisaster

RecoveryDedicated Circuits

¡¡¡¡¡¡DSU IV ESP 1204011L1● Supports rates of 2.4 kbps to

57.6 kbps

● Embedded SNMP via SLIP port

● Optional switched backup

¡¡¡¡¡¡TSU ESP 1200169L1● Single port T1/FT1 DSU/CSU

● Embedded SNMP via SLIP port

● Optional switched backup

¡¡¡¡¡¡TSU 600e 1202076L1● Modular T1/FT1 DSU/CSU with 6

option slots

● Embedded SNMP via SLIP and10BaseT

¡¡¡¡¡¡TSU 120e 1202129L1● Modular T1/FT1 DSU/CSU with one

option slot

● Integral V.35 DTE and DSX-1 ports

● V.35 DTE port with built in dialbackup

● Embedded SNMP via SLIP and10BaseT

¡¡¡¡¡¡ISU 512e 1203086L1● Terminates 4 BRI lines

● Supports BONDing and MLPPP

● Embedded SNMP via 10BaseT

ADTRAN is a registered trademark of ADTRAN, Inc.TSU, TSU IQ, TSU IQ+ and DSU IQ are trademarksof ADTRAN, Inc.

Printed in the U.S.A. on recycled paper.C1ABDR-105B March 1999©1999 ADTRAN, Inc. All rights reserved.

DSU IV ESP

● Backup options:4-wire SW56 (P/N 1204001L1)V.34 (P/N 1204002L1)1 B+D ISDN (P/N 1204004L1)

● 10BaseT optional Ethernet card for SNMP (P/N 1204005L1)

TSU ESP

● Backup options:4-wire SW56 (P/N 1204001L1)2 B+D ISDN (P/N 1204004L1)EXT DBU (P/N 1204006L1)

● 10BaseT optional Ethernet card for SNMP (P/N 1204005L1)

TSU 600e

● Nx56/64 DBU module for data and dial backup (P/N 1200158L1#HS)

TSU 120e

● Need cable for DBU (P/N 1200196L1)

ISU 512e

#1 #2

EIA366 DIALING PORT

EIA232 MAINT PORTON

OFF

90-250 VAC50/60HZ .1A

10BASET

#3

V.35

#4ISDN IFC

DTE 1

D J N T X

BB FF

LL

B F L R V Z DD

JJ NN

C H M S W AA EE

KK

A E K P U Y CC

HH

MM

CAUTION-RISK OFELECTRIC SHOCK

SUPPLEMENTAL EARTH GROUND MUST BECONNECTED PRIOR TO CONNECTION OF

TELECOMMUNICATION WIRING.

MODULE 1

MODULE 2

MODULE 3

MODULE 4

MODULE 5

MODULE 6

PWR

A

PWR

B

CONTROL

/CHAIN

IN OUT10 BASE TIN OUT MON NETWORK

SEE MANUAL BEFOREREMOVING POWER SUPPLY

CAUTION:MAINTENANCE TO BE

PERFORMED BY TRAINEDSERVICE PERSONEL ONLY

ALL EMPTY SLOTS MUST BECOVERED WITH BLANK PANELS

(600e ONLY)

O

I

1A/250V

CAUTION:FOR CONTINUED PROTECTION

AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE AND RATING

OF FUSE.

90-120 VAC50/60 HZ.

Nx56/64 PORT X.1 Nx56/64 PORT X.2

V.35

D J N T X

BB FF

LL

B F L R V Z DD

JJ NN

C H M S W AA EE

KK

A E K P U Y CC

HH

MM

D J N T X

BB FF

LL

B F L R V Z DD

JJ NN

C H M S W AA EE

KK

A E K P U Y CC

HH

MM

Nx56/64 PORT X.1 Nx56/64 PORT X.2

V.35

D J N T X

BB FF

LL

B F L R V Z DD

JJ NN

C H M S W AA EE

KK

A E K P U Y CC

HH

MM

D J N T X

BB FF

LL

B F L R V Z DD

JJ NN

C H M S W AA EE

KK

A E K P U Y CC

HH

MM

NETWORK OUTOUT MON

ININ

V.35TEST ACCESS CONTROL

DBU INTERFACE VOICE INTERFACE

115 VAC60HZ.15A

ON

OFF

D J N T X

BB FF

LL

B F L R V Z DD

JJ NN

C H M S W AA EE

KK

A E K P U Y CC

HH

MM

TELCO CONTROLV.35

EIA-232

DBU INTERFACE VOICE INTERFACE

115 VAC60HZ.15A

ON

OFF

D J N T X

BB FF

LL

B F L R V Z DD

JJ NN

C H M S W AA EE

KK

A E K P U Y CC

HH

MM