BT IPStream Products

James Appleton01/09/1999

2

BT IPStream Portfolio

IPswitch

ContentProvider

Corporate

High speed IP infrastructure with DSL access

ISP

IPStream Business

IPStream CentralEnd

user

3

Installation In End User Premises

ADSLNTERouter

IEEE802.3 10Mb/s Ethernet interface ontoend user PC or LAN

ATM25interface

Telephone line

NetworkTerminatingPoint

Splitter

End user’s computer(s) with TCP/IP stacks. At least one must run Netscape 4 or IE4.

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

End User Line Rates

Product DownstreamLine Rate

UpstreamLine Rate

S500 512kb/s 256kb/s

S1000 1024kb/s 256kb/s

S2000 2048kb/s 256kb/s

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

6

Web Screen To Initiate PPP Session

7

Addressing In An IP Session

ISP/CC

Radius

End userpremises

ISP/CC allocates IP address and DNS resolver addressduring PPP session initiation

BTInfrastructure

DHCPDNS relayManyone NAT

ISP or Corporatepremises

Issue:NAT prevents applications transparency

ISP or Corporate administered IP address space

8

IPStream Central Product Options

• Service Name String (eg CompanyName.com)• IP address pool

Line Rate Max Sessions Customer Interface512kb/s 40 X.21, 10baseT, 100baseT1Mb/s 40 X.21, 10baseT, 100baseT2Mb/s 40 X.21, 10baseT, 100baseT4Mb/s 900 X.21, 10baseT, 100baseT10Mb/s 900 10baseT, 100baseT34Mb/s 900 100baseT

9

AAAfunctions

BT IPStream InfrastructureRadius

Multi-ServicesPlatform (ATM)

RemoteAccessServer

End UserPremises

ISP or CorpPremises

NetworkTerminatingPoint (NTP)

NTP

ADSLNTE DSLAM

Radius

Home GatewayRouter

10

Overbooking & Protocol Layering

NTErouter

ADSLNTE

Homegatewayrouter

IP

PPP

L2TP

Ethernet ATM VC - 20:1 Overbooked

IP

RAS

MSP

ATM VP

ISP or Corpsets overbookingratio as required

LAN SDH SDH & MS

Product definesATM overbooking

DSLAM

DSLATM25