Most encoder and decoder ICs provide a mechanism for ensuring that a transmission is both valid and intended for a specific decoder. This is accomplished by giving each encoder an address that can uniquely identify it. The decoder can then only respond to encoders with an authorized address. Creating the address has typically been done in one of two ways. Low-security devices usually have an address set manually with a DIP switch or cut traces. The user must set the same address on the encoder and the decoder in order for them to communicate. Given that there must be extra hardware which can be easily accessible by the user, there are a limited number of lines which offers a limited number of addresses. For example, 10 lines offer only 1,024 unique addresses. The second way, typically used by the higher security devices, is to seed each encoder with an address during the manufacturing process. These devices can have large numbers making each encoder unique, but it is an additional step in the manufacturing process and requires special programmers to load the number into each encoder. Linx products offer the best of both worlds. The DS Series offers the simplicity of DIP switch addressing for applications that do not need a large number of addresses. The MS Series uses a large address, which is created in the encoder by a random number generator that is activated by taking one of the lines high. This allows the address to be set with the press of a button, eliminating the need for a programmer. The large number of bits means that there is a great deal of uniqueness. The address is learned by the decoder by the press of another button. This makes creating a unique association by the user fast and straightforward. In a similar method, the HS Series uses the random nature of button presses to create the encryption key which eliminates the need for a special programmer. The latest technology used in the TT Series uses a button press on both sides to place the parts into Pair mode. The modules automatically find each other and trade addresses with no further need for input from the manufacturer or user.