PBX and VoiceMail. Dial Extention 143

PSTN_Press_143

I was visualizing how PBX and VoiceMail works. VoiceMail is what we hear with a welcome greetings and asking for extension number or seek operator assistance. PBX (Private Branch Exchange, which is a private telephone network used within a company) “routes” the call to the desired extension or local number.

Enjoy.

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