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Developing a Fax Application
November 2009 63
Sending a Fax to a Channel from an External Fax
Machine
Use the fax.c sample program to send a fax from an external fax
machine to a channel in your system. Then send the same fax back to
the same fax machine from the same channel in your system.
1. Prepare channel 1 to receive a fax as you did in the previous
example. Use the same input filename recfile.ips used to send a
fax from one channel to another in the same system:
fax -u 1 -r recfile.ips
Channel 1 is now set to receive a fax and is waiting for a ring
signal.
2. At the fax machine, insert the sample fax in the fax machine and
call the channel's (channel 1) phone number in the normal way.
At the tone send your sample fax.
Wait for the selected channel to receive the sample fax.
3. Send the received fax back to the fax machine:
fax -u 1 -s wphonenum recfile.ips
This time, phonenum is the phone number of the external fax
machine.
You can examine the structure of the infopkt stream recfile.ips
before you transmit it back to the fax machine.
decode recfile.ips