ADTRAN L128T Chapter Installation, Isdn Network Connection, Local Area Network Connection

Chapter 2

Installation

After unpacking the unit, immediately inspect it for possible shipping dam- age. If damage is discovered, file a claim immediately with the shipping car- rier; then contact the ADTRAN Repair and Return department.

ISDN NETWORK CONNECTION

The Express L128/L128T 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 public net- work.

The leased operation mode supports dedicated 2B1Q data service at rates up to 144 kbps by using a nailed up circuit, or a permanent connection between endpoints.

See Appendix D on page 143 for ISDN network connector pin assignments.

LOCAL AREA NETWORK CONNECTION

The Express L128/L128T 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 directly to a computer’s 10BaseT net- work interface card.

Other types of Ethernet interfaces (i.e., AUI, 10Base2, etc.) can be accommodat- ed by obtaining an appropriate converter.

61202.070L1-1 Express L128/L128T User Manual 21