ADTRAN Express 4100 Demand Routing and Bridging with the Express 4100/4110

Chapter 1. Understanding ISDN and the Express 4100/4110
1-6 Express 4100/4110 User Manual 61200176L2-1
2. IP Router: The Express 4100/4110 can function as an IP router using
the Routing Information Protocol (RIP) for advertising and learning
routes among other r outers. Static r outes may also be entered into the
routing table.
3. IPX Router: IPX routers and services can be exchanged between the
Express 4100/4110 and other devices using RIP and Service Advertis-
ing Protocol (SAP). Watch dog serialization filtering and spoofing can
permit the ISDN to be idle during no application traffic periods.
4. Network Address Translation (NAT): Single networks can connect to
the Internet with this function. The Express 4100/4110 translates out-
going IP packets over the ISDN to the IP router at the Internet Service
Provider. Popular Internet applications are supported.
5. POTS: The POTS interfaces can be used for interfacing to dual tone
multi-frequency (DTMF) analog devices such as telephones, modems,
fax machines, etc. The Express 4110 POTS option is available on part
number 1200176L2 only.
Demand Routing and Bridging with the Express 4100/4110
The Express 4100/4110 is a dial-up ISDN IP Router and Transparent
Learning Bridge that provides Dial-On-Demand and Dynamic Bandwidth
Management. Its features can be easily configured and used once several
basic concepts are understood.
Factor y D ef ault
The Express 4100/4110 comes from the factory configured for MAC
Bridging, IP routing, and IPX routing with no filters or connection infor-
mation defined. An IP address of 10.0.0.1 with a network mask of
255.255.2 55.0 is preloa ded. Dynamic Bandwidth Managem ent features ar e
disabled. Although dynamic assignment of a B-channel for the analog
(POTS) ports on the Express 4110 model is a lways available, link idle
time-out and adding/removing of B-channels based on traffic is initiall y
disabled.