Information transmit/receive apparatus onto which a sorter can be mounted via an adapter

An information transmit/receive apparatus comprising:

• a printer having a sheet feed portion, a sheet discharge portion and a first sheet sensor disposed adjacent to the discharge portion;
• an original reader having a sheet feed portion and a sheet discharge portion;
• a sorter having a sheet entrance port, second sheet sensor and a controller for controlling movement of the sorter, and connected to the sheet discharge portion of said printer via an adapter for coupling the sheet discharge portion and the sheet entrance port together;
• said adapter having a path connecting the sheet discharge portion of said printer and the sheet entrance port of said sorter;
• and
• control means for controlling said sorter and original reader to perform a receive operation and a transmit operation,
• wherein said adapter includes a sheet passage detection sensor for informing said controller that the sheet is in the path of said adapter.