Notes

Outline

Network Communications Chapter 7 Modems, DSL, Cable Modems and ISDN

Public Switched Telephone Network (PSTN)

Telephone Carrier Signal (Sine Wave)

Amplitude Shift Keying (ASK)

Frequency Shift Keying (FSK)

90 Degree Phase Shift

Phase Shifting the Carrier

Constellation Diagrams

8 – QAM Modulation

56 Kb/sec Modem Connection

ADSL Modem Asymmetric Digital Subscriber Line

ADSL Modem Architecture

Cable TV Distribution

Hybrid Fiber Coax (HFC)

A Cable Modem Connection

Sharing a Cable/DSL Modem

ISDN Basic Rate 2B + D: 144 Kb/sec

Using the Basic Rate Interface

ISDN Primary Rate 23B + D (T1)

ISDN PRI Application