After years of experience in the intercom field, ALTAIR launched the "EF-204" base station as an all-in-one solution for those professionals requiring both ease of use, versatility and multiple channel operation. The power supply in this master station will power every device connected to the intercom network (up to 60 single channel beltpacks or 20 desk stations). In case of a short circuit at any point of the line, the unit will shut down, with an instantaneous recovery after the problem is fixed. The four channels are provided with independent "TALK", "LISTEN", and "CALL" buttons. The link between channels can be selected using the front panel buttons. Thanks to its built-in digital processor, every ALTAIR device (E-200 Series) can be remotely controlled from a base station. This system allows the user at the main base station to execute different functions that will affect all the devices in the network, such as "MIC KILL", remote buzzer switch-off, latch or PTT mic switching, etc. These functions are specially useful when working in silent environments where acoustic calls are not an option. In this case we will use the luminous "CALL" function.