Fax tones and handshake
When someone is sending a fax, the fax machine sends fax calling tones (CNG tones). These are quiet, intermittent beeps every
Each time you use automatic procedures to send a fax, you are sending CNG tones over the phone line. You will soon learn to listen for these quiet beeps each time you answer a phone on your fax line, so you will know if you are receiving a fax message.
The receiving fax responds with fax receiving tones, which are loud, chirping sounds. A receiving fax chirps for about 40 seconds over the phone line, and the LCD shows Receiving.
If your machine is set to the Fax Only mode, it will answer every call automatically with fax receiving tones. If the other person hangs up, your machine will continue to send the “chirps” for about 40 seconds, and the LCD continues to show Receiving. To cancel receiving, press Stop/Exit.
The fax ‘handshake’ is the time in which the sending machine’s CNG tones and the receiving machine’s “chirps” overlap. This must be for at least 2 to 4 seconds, so both machines can understand how each is sending and receiving the fax. The handshake cannot begin until the call is answered, and the CNG tones only last for about 60 seconds after the number is dialed. So it is important for the receiving machine to answer the call in as few rings as possible.
General Information
ECM (Error Correction Mode)
The Error Correction Mode (ECM) is a way for | 1 |
the machine to check a fax transmission while it is in progress. If the machine detects errors during fax transmission, it resends the pages of the fax that had an error. ECM transmissions are only possible between fax machines that both have this feature. If they do, you may send and receive fax messages that are continuously being checked by the machine.
If this feature stops working, delete your faxes from the memory.
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