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Chapter 2
ISDN NETWORK CONNECTION
4110 LOCAL AREA NETWORK CONNECTION
4120 LOCAL AREA NETWORK CONNECTION
61200176L3-1
After unpacking the unit, immediately inspect it for possible shipping
damage. If damage is discovered, file a claim immediately with the ship-
ping carrier; then contact the ADTRAN CAPS department (see back
page).
The Express 4110/4120 supports either dial or leased operation. A single
RJ-49C 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 network. The leased operation mode sup-
ports dedicated 2B1Q data service 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
assignments.
The Express 4110 has a single 10BaseT connection port that provides half
duplex 10 Mbps operation over a 4-wire twisted pair. Other types of
Ethernet interfaces (i.e., AUI, 10Base2, etc.) can be accommodated by
obtaining an appropriate converter.
The Express 4110/4120 has an integrated hub with four 10BaseT connec-
tion ports. Each port can provide half duplex 10 Mbps operation over a 4-
wire twisted pair. All four 10BaseT connection ports are the same and are
treated equally by the Express 4110/4120.
Express 4110/4120 User Manual
Installation
2-1
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Troubleshooting
