In the past, when you call an office building or business, you would either be transferred to the department you want to talk to, or given their extension number. This extension is usually a 2-3 digit code that when dialed, transfers you automatically to the particular person or department you want to speak with. The reason why this code works is because it is programmed into a PBX system.
AVAD Networks, Inc.
Welcome to AVAD Networks-African Voice And Data. AVAD is the premier carrier for retail and wholesale international long distance traffic in and out of Africa and the rest of the world. Unlike our competitors, AVAD partners with national carriers based in
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