The Model 24SII Data Exchange System allows pairs of computers (or computers and other devices such as modems, scales, data collection equipment, etc.) to communicate while other computers are sending data to the print buffer and the Model 24SII DES is sending data to printers. Full duplex communication allows file transfer with many popular communications software packages.
NOTE:
If two serial computers wish to communicate, either computer sends to the Model 24SII DES the Port Select Code followed by the other computer's module number and port number, and a terminating character: 0D Hex (Enter/Return) or 0A Hex (Line Feed).
If the requested computer is free, the two computers are connected with full duplex communication, and an On Line message is sent by the Model 24SII DES to the computer requesting the connection.
If the requested computer is busy, the computer requesting connection receives a Busy message from the Model 24SII DES.
To disconnect, either connected computer first delays two seconds and then sends the Port Select Code followed by a terminating character: 0D Hex (Enter/Return) or 0A Hex (Line Feed). You must wait another two seconds after sending the disconnect sequence, before sending any other data such as a print job or Port Select Code.
