- 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)