61200.070L1-1 Express XL/XLT User Manual 21
Chapter 2InstallationAfter 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 XL/XLT supports either dial or leased operation. A single RJ-45
modular jack labeled ISDN BRI U on the rear panel provides connection to ei-
ther 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
end points.
See Appendix D on page 143 for ISDN network connector pin assignments.
LOCAL AREA NETWORK CONNECTION
The Express XL/XLT has a 10BaseT connector that provides half-duplex 10
Mbps operation over a four-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.