ADTRAN Express L128, User Manual

Page: 26 / 200

Chapter 1: Understanding ISDN and the Express L128/L128T
61202.070L1-1 Express L128/L128T User Manual 9
Single User IP to Internet Service Provider (ISP) using Network Ad-
dress 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 L128/
L128T.
• Overcomes the serial port speed limitations of current terminal adapter
solutions
• Multilink Point-to-Point Protocol (PPP) plus compression yields effective
throughput greater than 256 kbps.
• Compatible with popular ISP access devices
Figure 1-3
Single User to Internet Service Provider
ISDN
INTERNET
10 BT
10 BT
1
O ISDN
OFF
ON
2 1 EIA232 10 BASE T POWER
1 2 3 4
TO
HUB
TO
NIC