Euroblock
Euroblock, short for "European-style terminal block", is an extra-low voltage disconnectable (or pluggable) connector and terminal block combination commonly used for microphone- and line level-audio signals, and for control signals such as RS-232 or RS-485. It is also known as the Phoenix connector from one of the manufacturers, Phoenix Contact, a German company whose US operations were established in 1981 in Harrisburg, Pennsylvania; though there are many manufacturers who make compatible products.