An EL device stores a series of operating parameters in non-volatile memory. The most commonly used values are set as the factory default. These values can be easily changed using a program provided by CallerID.com. Some software solution providers may elect to write their own setup program.

Changing a parameter value is accomplished by sending a UDP packet with special commands. All such packets begin with the characters ^^Id , a one character command identifier, and then the value. The structure is: