Chapter 1: Understanding ISDN and the Express XL/XLT
61200.070L1-1 Express XL/XLT 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 XL/XLT.
• 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
PHONE 10BIT POWER
ISDN
BRI U MAINTENANCE TO TO
NIC HUB
ISDN INTERNET
10 BT
10 BT