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Installation
Chapter 2
SHIPPING DAMAGE
After unpacking the unit, immediately inspect it for possible shipping
damage. If damage is discovered, file a claim immediately with the
shipping carrier; then contact the ADTRAN Repair and Return de-
partment.
ISDN NETWORK CONNECTION
The Express L128T S/T supports either dial or leased operation. A
single RJ-45 modular jack labeled ISDN on the rear panel provides
connection to either network service.
Dial operation allows the user to dial out or receive calls over the pub-
lic network. The leased operation mode supports dedicated data ser-
vice at rates up to 128 kbps by using a nailed up circuit, or a permanent
connection between endpoints.
See Connector Pinouts on page D-1 for ISDN network connector pin as-
signments.
LOCAL AREA NETWORK CONNECTION
The Express L128T S/T has a 10BaseT connector that provides half-
duplex 10 Mbps operation over a 4-wire twisted pair. Place the switch
in the TO HUB position when connecting to a 10BaseT concentrator or
Hub. Place the switch in the TO NIC position when connecting direct-
ly to a computer's 10BaseT network interface card.
Other types of Ethernet interfaces (i.e., AUI, 10Base2, etc.) can be ac-
commodated by obtaining an appropriate converter.
61202070L3-20
Express L128T S/T User Manual
2-1
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Table of Contents
Troubleshooting
