The first chapter common industry terms 3
1.1 what is a VOIP 3
1.2 what is a PSTN 3
1.3 what is a CID 3
1.4 what is the calling and called 3
1.5 what is a dial tone 3
1.6 what is the tone or connect the sound 3
1.7 what is the ring 3
1.8 what is busy 4
The second chapter common business terms to explain 4
2.1 fax express business 4
2.2 IP PBX business 4
2.3 NetBar business 4
2.4 the Callback business 4
2.5 UI800 business 5
2.6 small hand in virtual business 5
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