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CCVP GWGK Quick Reference Sheets by Brion Washington

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Chapter . Analog Connectivity

Since the day the telephone was invented, analog has been the method used by phones. Analog waves are converted by the phone into electrical signal to cross the network; it is converted back to analog at the destination. Analog has been around for a long time. There are a few technologies that have been born in the analog communication world, as discussed in the following subsections.

Analog Signaling

There are a few choices for analog signaling, depending on what you require. Signaling is the call control messages sent between devices on the PSTN. Signals include information such as the phone is ringing, incoming call, line is busy, and so on. Some of the older signaling types have been mostly replaced be newer, more ...

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