Inside an ISP POP

ISP Point-of Presence

Modem Pool

Individual

Dial-up Customers

Corporate

T1 Customer

T1 CSU/DSU

Corporate

T3 Customer

T3 CSU/DSU

Corporate

OC-3 Customer

ATM Switch

Layer-2

Switch

ISP POP

ISP POP

ISP POP

NAP/MAE

Remote

Access

Server

ATM

Switch

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