Nortel Networks 8683POS User Manual

Using the Passport 8683POS Module

  

A typical application consists of a single Passport 8683POS Module in an 
Passport 8600 series switch, but multiple modules are also supported. This chapter 
briefly explains how the Passport 8683POS Module operates within the Passport 
switch.

A typical network application of the Passport 8683POS Module is a direct 
connection between one Passport 8600 series switch with a Passport 8683POS 
Module in one campus to an identical module in another Passport 8600 series 
switch at another campus connected over a SONET ring. Using this connection, 
you achieve an intercampus link through packet over SONET (POS) technology.

This chapter contains the following information:

•

“SONET transmission,”

 next

•

 

You can connect the Passport 8683POS Module through a Synchronous Optical 
Network (SONET) termination multiplexor to extend the range of the wide area 
network (WAN) connections. Or, you can connect the Passport 8683POS Module, 
using fiber, directly to a POS interface on another Passport routing switch or on a 
traditional router.

The SONET frames received from the WAN contain IP packets encapsulated in 
Point-to-Point Protocol (PPP) that are converted by the Passport 8683POS 
Module into an Ethernet format. Similarly, the Passport 8683POS Module 
receives Ethernet frames and converts them into PPP packets for transmission 
over SONET.