Skip Navigation

Federal Communications Commission

English Display Options


Speech-To-Speech Relay Service

Speech-to-Speech (STS) is one form of Telecommunications Relay Service (TRS). TRS is a service that allows persons with hearing and speech disabilities to access the telephone system to place and receive telephone calls. STS enables persons with a speech disability to make telephone calls using their own voice (or an assistive voice device). Like all forms of TRS, STS uses Communications Assistants (CAs) – to relay the conversation back and forth between the person with the speech disability and the other party to the call. STS CAs are operators who are specifically trained in understanding a variety of speech disorders, which enables them to repeat what the caller says in a manner that makes the caller's words clear and understandable to the called party. The Commission's rules ensure that STS users have the same ease of reaching an STS CA as users of the other types of TRS using 711 dialing.

Who Uses STS?

Often people with speech disabilities cannot communicate by telephone because the parties they are calling cannot understand their speech. People with cerebral palsy, multiple sclerosis, muscular dystrophy, Parkinson's disease and those who are coping with limitations from a stroke or traumatic brain injury may have speech disabilities. People who stutter or have had a laryngectomy may also have difficulty being understood. In general, anyone with a speech disability or anyone who wishes to call someone with a speech disability can use STS.

Using STS

A person can make an STS call from any telephone. You simply call the relay center by dialing 711, and indicate you wish to make an STS call. You are then connected to an STS CA who will repeat your spoken words, making the spoken words clear to the other party. Persons with speech disabilities may also receive STS calls. The calling party calls the relay center by dialing 711 and asks the CA to call the person with a speech disability. STS users have the option of muting their voices during an STS call, so that the party to whom they are speaking hears only the voice of the STS CA, and not the voice of the STS user. If you wish to use this option, please inform the STS CA to mute your voice for the other party to the call. If you choose this option, the STS CA will still be able to hear what you are saying, and will re-voice what you say to the other party.

Mandatory Minimum Standards for STS

The FCC imposes mandatory minimum standards on providers of all forms of TRS, such as ensuring user confidentiality, making service available 24 hours a day, seven days a week, and answering 85 percent of calls within 10 seconds. The FCC also imposes certain additional requirements on STS providers. For example, for each STS call lasting 20 minutes or longer, an STS CA must remain with a call for a minimum of 20 minutes before transferring the call to another CA. This allows for more effective communication for the STS user because the same CA stays on the call for a longer time. In addition:

  • An STS CA may, at the request of the user, retain information from a particular call in order to facilitate the completion of consecutive calls. The user may ask the TRS CA to retain such information, or the CA may ask the user if he or she wants the CA to repeat the same information during subsequent calls. The STS CA may retain the information only for as long as it takes to complete the subsequent calls.
  • STS providers must offer STS users the option to maintain at the relay center a list of names and telephone numbers that the STS user commonly calls. When the STS user requests one of these names, the CA must repeat the name and state the telephone number to the STS user. This information must be transferred to any new STS provider.
  • STS providers must have emergency call procedures in case an STS user calls 911.

For further information on other types of TRS in addition to STS, go to

Filing a Complaint with the FCC

If you have a problem with an STS Relay Service, first try to resolve it with the provider. If you are unable to resolve it directly, you can file a complaint with the FCC. There is no charge for filing a complaint. You can file your complaint using an online complaint form found at You can also file your complaint with the FCC's Consumer Center by calling 1-888-CALL-FCC (1-888-225-5322) voice or 1-888-TELL-FCC (1-888-835-5322) for TTY; or writing to:

Federal Communications Commission
Consumer and Governmental Affairs Bureau
Consumer Inquiries and Complaints Division
445 12th Street, SW
Washington, D.C. 20554

What to Include in Your Complaint

The best way to provide all the information the FCC needs to process your complaint is to thoroughly complete the online complaint form. When you open the online complaint form, you will be asked a series of questions that will take you to the particular section of the form you need to complete. If you do not use the online complaint form, your complaint, at a minimum, should indicate:

  • your name, address, email address and phone number where you can be reached
  • whether you are filing a complaint on behalf of another party, and if so, the party's name, address, email address, day time phone number and your relationship to the party
  • preferred format or method of response (letter, fax, voice phone call, email, TRS, TTY, ASCII text, audio recording or Braille)
  • that your complaint is about TRS
  • the name, address and telephone number (if known) of the STS provider about which you are complaining
  • a brief description of your complaint and the resolution you are seeking

For More Information

For more information about STS Relay Service or TRS, or to learn more about FCC programs that promote access to communications services for people with disabilities, visit the FCC's Disability Rights Office website.

For information about other telecommunications issues, visit the FCC's Consumer website, or contact the FCC’s Consumer Center using the information provided for filing a complaint.

Print Out

Speech-To-Speech Relay Service Guide (pdf)

Updated: October 20, 2014

You are leaving the FCC website

You are about to leave the FCC website and visit a third-party, non-governmental website that the FCC does not maintain or control. The FCC does not endorse any product or service, and is not responsible for, nor can it guarantee the validity or timeliness of the content on the page you are about to visit. Additionally, the privacy policies of this third-party page may differ from those of the FCC.