Part 1 Fundamentals of Telephony
1.03 The Public Switched Telephone Network (PSTN)
1.05 Analog Circuits
1.07 What is Sound?
1.09 The Voiceband
1.11 Plain Ordinary Telephone Service (POTS)
1.13 DTMF Address Signaling
1.15 Signaling System 7 (SS7) Part 2 Telecom Equipment
2.03 Telephone Switches
2.05 PBX vs. Centrex
2.07 Voice VPNs
2.09 Call Centers Part 3 The Telecommunications Industry
3.03 US Domestic Telcos
3.05 AT&T and Verizon
3.07 Canadian Telephone Companies
3.09 PSTN Switching Centers Before Competition
3.11 Accessing The Interexchange Carriers
3.13 Competitive Local Exchange Carriers (CLECs)
download links: http://rapidshare.com/files/172892428/voipcd1.part1.rar
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