Each ComAp device usually allows for multiple ways of connection. The simplest one supported by majority of our devices is RS232 (serial) connection. For this you need an RS232 cable (null modem) and if your PC is not equipped with RS232 port you need a USB<->RS232 converter.
Becoming prevalent in the recent years is USB connection. Almost all ComAp devices support connection using simple USB A<->B cable (printer cable) for easy configuration. Some devices can be powered from the USB port for programming to allow easy configuration right on your desk.
Other connection types: Internet connection (LAN, GPRS, 3G, 4G), Modbus RTU, Modbus TCP, SNMP, AirGate, Modem.
Note that some connection types would require you to use a communication module (plug-in) or communication bridge (external device). Not all types of connection are possible on each device. You can find all details related to this topic in your device's Comprehensive guide or Communication guide.