All encoders provide at least one input line that is normally connected to a switch or contact. Often it is advantageous to have multiple buttons or even a keypad matrix. While it is common to find 4 inputs, Linx products offer 8. This allows more functionality to be implemented in a product. Further, the decoder outputs can be set to be momentary or latching. During momentary operation the outputs go high for as long as control messages are received instructing the decoder to take the output high. As soon as the control messages stop, the outputs go low. During latched operation, when a signal is received to make a particular output high, it will remain high until a separate activation is received to make it go low. The transmission must stop and the decoder must time out before it will register a second transmission and toggle the outputs. A unique and important feature of Linx decoders is their ability to identify the transmitting encoder. In conventional designs, all encoded transmissions are either recognized or denied based on the address. Linx decoders output the transmitter’s unique ID as a binary number. This is necessary in access control applications where it is critical to log who has accessed an area and when.