Slide 1Circuit Signalling Chapter 3 Slide 2 Circuit Signalling All circuits, analogue and digital, use signalling methods to communicate. Although the signalling methods…
Slide 1Introduction to Telecommunications by Gokhale CHAPTER 4 VOICE COMMUNICATIONS Slide 2 2 PSTN Public Switched Telephone Network –Based on star, ring or mesh topologies…
1. PSTNCCNA-VOICE 2. 2 3. 3 4. 4 5. 5 6. 6 7. 7 8. 8 9. 9 10. Loop Start•When the FXO is idle, the two-wire local loop is open. The tip and ring leads are not…
1 Cisco SPA122 Configuration Guide for FreePhoneLine Software Version: 1.3.3(015) Official FPL guidelines you can find at: http://support.freephoneline.ca/entries/23120323-VoIP-Unlock-Key-Credentials…