- Adtran ISDN Router/Bridge User Manual

Chapter 1. Understanding ISDN and the Express 4110/4120
1-4 Express 4110/4120 User Manual 61200176L3-1
Single User IP to Internet Service Provider (ISP) using Network
Address Translation (NAT)
Provides high speed home access to the Internet
NAT provides translation from user assigned IP addresses to ISP
assigned IP addresses.
The PC’s IP address can be dynamically assigned by the Express
4110/4120.
Overcomes the serial port speed limitations of current terminal
adapter solutions
Multilink Point-to-Point Protocol (PPP) plus compression yields effec-
tive throughput greater than 256 kbps.
Compatible with popular ISP access devices
Figure 1-5. Single User to Internet Service Provider (4110)