1. BT IPStream Products James Appleton 01/09/1999

2. 2 BT IPStream Portfolio IP switch Content Provider Corporate High speed IP infrastructure with DSL access ISP IPStream Business IPStream Central End user

3. 3 Installation In End User Premises ADSL NTE Router IEEE802.3 10Mb/s Ethernet interface onto end user PC or LAN ATM25 interface Telephone line Network Terminating Point Splitter End user’s computer(s) with TCP/IP stacks. At least one must run Netscape 4 or IE4.

4. 4 End User NTE Terminates PPP session to ISP / Corporate –Session established via network IP switch –Single session for all end users served by interface Provides IP over Ethernet presentation –802.3 Ethernet at 10Mb/s –Default subnet 192.168.254.0/24 –Can specify alternative when order service –Up to 30 active hosts on subnet Features –DHCP into appropriate subnet (default range [1…20]) –Many  One Network Address Translation –DNS Relay

5. 5 End User Line Rates Note: Line rates refer to total IP bit rate (header + payload). BT’s network is engineered for 20:1 contention ratio.

6. 6 Web Screen To Initiate PPP Session

7. 7 Addressing In An IP Session ISP/CC Radius End user premises ISP/CC allocates IP address and DNS resolver address during PPP session initiation BT Infrastructure DHCP DNS relay Many  one NAT ISP or Corporate premises Issue: NAT prevents applications transparency ISP or Corporate administered IP address space

8. 8 IPStream Central Product Options Service Name String (eg CompanyName.com) IP address pool

9. 9 AAA functions BT IPStream Infrastructure Radius Multi-Services Platform (ATM) Remote Access Server End User Premises ISP or Corp Premises Network Terminating Point (NTP) NTP ADSL NTE DSLAM Radius Home Gateway Router

10. 10 Overbooking & Protocol Layering NTE router ADSL NTE Home gateway router IP PPP L2TP EthernetATM VC - 20:1 Overbooked IP RAS MSP ATM VP ISP or Corp sets overbooking ratio as required LAN SDH SDH & MS Product defines ATM overbooking DSLAM DSL ATM25