61200176L2-1 Express 4100/4110 User Manual 1-1
Chapter 1 Understanding ISDN and the
Express 4100/4110
ISDN OVERV IEW
The Integrated Services Digi tal Network (ISDN) is a public or private
switched digital network. ISDN is an international standard for digital
communications, allowing a full range of enhanced services supporting
voice, data, and image applications through standard interfaces over a
single telephone wire. ISDN provides a means of integrating these ser-
vices and modernizing communication networks for information move-
ment a nd managem ent efficiency.
THE EXPRESS 4100/41 10
The Express 4100/4110 is a standalone device that links two Local Area
Networks (LANs ) us ing a high-speed ISDN public network or leased
two-wire line. Optionally, the Express 4110 has two plain old telephone
service (POTS) connectors used for voice/modem applications
See Figure 1-1 on page 1-2 for an illustration of the Express 4100/4110.
The 10BaseT connector operates at 10 megabits per second half duplex
and accepts standard Ethernet packets encapsulated using IEEE 802.3 or
Ethernet II (DIX) . The mai ntena nce port can conne ct to an y asynch r onous
terminal emulating a VT 100 terminal for configuration.