Avaya Configuring Dial Services Manual do Utilizador Página 123

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308621-14.00 Rev 00
5-1
Chapter 5
Implementation Notes
for All Dial Services
This chapter describes the Nortel Networks implementation of all three dial
services. It includes the following information:
Point-to-Point Protocol
You can use Point-to-Point Protocol (PPP) across dial lines for any dial service.
PPP Authentication
Dial circuits use a PPP identification mechanism to identify the calling router to
the called router. The identification process takes place during PPP link
negotiation, which occurs before the routers establish a connection to send
protocol data.
The identification mechanism relies on one of two PPP authentication protocols:
Challenge Handshake Authentication Protocol (CHAP) or Password
Authentication Protocol (PAP). CHAP and PAP implement a security feature that
identifies peer routers to one another. CHAP is the default authentication protocol.
Topic Page
Point-to-Point Protocol 5-1
WAN Encryption Protocol 5-6
Asynchronous PPP 5-6
RADIUS 5-9
ISDN Services 5-10
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