Parkervision WR1500 User Manual download pdf (Page 173)

WR1500 4-Port Wireless DSL/Cable Router

175

Appendix C

PPoE

PPPoE in Action

An ADSL modem bridges a PPP session over Ethernet (PPP over Ethernet, RFC 2516) from

your PC to an ATM PVC (Permanent Virtual Circuit), which connects to a DSL Access

Concentrator where the PPP session terminates (see the next ﬁ gure). One PVC can support

any number of PPP sessions from your LAN. PPPoE provides access control and billing

functionality in a manner similar to dial-up services using PPP.

Beneﬁ ts of PPPoE

PPPoE offers the following beneﬁ ts:

1. It provides you with a familiar dial-up networking (DUN) user interface.

2. It lessens the burden on the carriers of provisioning virtual circuits all the way to the ISP

on multiple switches for thousands of users. For GSTN (PSTN & ISDN), the switching

fabric is already in place.

3. It allows the ISP to use the existing dial-up model to authenticate and (optionally) to

provide differentiated services.

Traditional Dial-up Scenario

The following diagram depicts a typical hardware conﬁ guration where the PCs use traditional

dial-up networking.

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Parkervision WR1500 User Manual Page 173