The Deaf and Disabled Telecommunications Program (DDTP) is a public program mandated by the California State Legislature and administered by the California Public Utilities Commission (CPUC). The DDTP has two components: the California Relay Service (CRS), which includes Speech to Speech, and the California Telephone Access Program (CTAP) which provides assistive telecommunications equipment. The mission of the program is to provide access to basic telephone service for Californians who have difficulty using the telephone.
Programs are funded by a nominal surcharge on all telephone bills in the state. This surcharge appears on bills as "CA Relay Service and Communications Devices Fund."