A ticket printer connected via a COM port is an efficient and reliable way to print your tickets.  The ticket printer is connected to the COM port of the cash register via a cable, allowing the printer and the cash register to communicate with each other.  When a print command is sent to the ticket printer, the command is quickly processed, and the ticket is printed.  Due to the direct connection between the printer and the computer via the COM port, there is minimal delay and no chance of data loss.

A ticket printer connected via a COM port is therefore a popular choice in applications where tickets need to be printed quickly and reliably.