The Deaf and Disabled Telecommunications Program (DDTP) is a California State mandated program, under governance of the California Public Utilities Commission (CPUC). Under the DDTP the California Telephone Access Program (CTAP) distributes telecommunications equipment and services for individuals certified as having functional limitations of hearing, vision, mobility, speech and/or interpretation of information.

CTAP is funded by a small surcharge that appears on all Californians' telephone bills. The money collected from this surcharge pays for both the California Telephone Equipment Loan Program (CTAP) and the California Relay Service (CRS). This surcharge appears on your phone bill as "CA Relay Service and Communications Devices Fund."

You can visit the DDTP website for your more information - www.ddtp.org