Widely known as a serial port of personal computers. Historically was widespread in telecommunications equipment. Currently still used to connect all kinds of specialized or obsolete equipment to computers, however, most are now superseded by the USB interface. RS-232 provides data transfer and some special signaling between the terminal and the communication device at a distance up to 15 meters.
Excellent audio quality• Door / gate opening via App• Call tone differentiation for front door and storey call• WiFi, Ethernet, PoE• No ongoing costs,..
4 or 8 FXS ports with PSTN life line in case of power failure2 10/100 Mbps network ports (switched or routed)Comprehensive codec support, caller ID, f..