newsletter archives - april, 1998

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Volume 3. Issue 1.

On Ramp to the Internet or Intranet

Introduction

The purpose of the On Ramp to the Internet or Intranet allows users to send paper documents over the Internet or through Intranet. It will use the existing Fax/Voice C++
communication mechanism to transport the fax, however the user will be able to submit the fax from any standard fax machine. No special dialers or other hardware will be
required beyond a standard Fax/Voice compatible modem.

Basic Operation

The system will allow for a standard fax machine to be connected directly to a modem in
the fax server. When the user

takes the fax machine "Off Hook", they will hear a dial tone. Then the user will dial the
number in the normal manner. The fax server will listen for the digits dialed by the user and then receive the fax.
A fax server will require at least two fax modems. One is connected directly to the standard fax machine and the other is connected to the PSTN to make outgoing calls.

When a user picks up the headset on the fax machine he will hear a dial tone. As the user dials the number, the voice/fax modem will record the dialed number and listen for the CED tone generated by the fax machine. When the user presses the "Send Button", the modem will then initiate the fax transmission

cycle and receive the fax into the server.

Hardware
Requirement
 

A fax modem capable of performing the four simultaneous functions.
1. Capable of generating 48 volts to connect a fax machine to it without a switch.
2. Generate a frequency to simulate dial tone.
3. Detect DTMF tone.
4. Detect CED tone and switch from voice mode to fax mode.

The amazing part of this is that all of the above can be done at the same time in a single session without dropping the line.
 

On Ramp to the Internet graph


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