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and IP phones. 3. What are the advantages? Why would I be interested? When you are using Public Switched Telephone (PSTN) line, you typically pay for the time you use: The more time you stay on the phone the more you'll pay. And you generally don't have the option of talking with more than one person at a time (or you can, but at increased cost). With VoIP, you can talk low cost dialup, cost dialup lowcost dialup, low, low cost dialup
low cost dialup |
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