FCC 64.601 Revised as of December 4, 2012
Goto Year:2011 |
§ 64.601 Definitions and provisions of general applicability.
(a) For purposes of this subpart, the terms Public Safety Answering
Point (PSAP), statewide default answering point, and appropriate local
emergency authority are defined in 47 CFR 64.3000; the terms pseudo-ANI
and Wireline E911 Network are defined in 47 CFR 9.3; the term affiliate
is defined in 47 CFR 52.12(a)(1)(i), and the terms majority and debt
are defined in 47 CFR 52.12(a)(1)(ii).
(1) 711. The abbreviated dialing code for accessing relay services
anywhere in the United States.
(2) American Sign Language (ASL). A visual language based on hand
shape, position, movement, and orientation of the hands in relation to
each other and the body.
(3) ANI. For 911 systems, the Automatic Number Identification (ANI)
identifies the calling party and may be used as the callback number.
(4) ASCII. An acronym for American Standard Code for Information
Interexchange which employs an eight bit code and can operate at any
standard transmission baud rate including 300, 1200, 2400, and higher.
(5) Baudot. A seven bit code, only five of which are information bits.
Baudot is used by some text telephones to communicate with each other
at a 45.5 baud rate.
(6) Call release. A TRS feature that allows the CA to sign-off or be
“released” from the telephone line after the CA has set up a telephone
call between the originating TTY caller and a called TTY party, such as
when a TTY user must go through a TRS facility to contact another TTY
user because the called TTY party can only be reached through a
voice-only interface, such as a switchboard.
(7) Common carrier or carrier. Any common carrier engaged in interstate
Communication by wire or radio as defined in section 3(h) of the
Communications Act of 1934, as amended (the Act), and any common
carrier engaged in intrastate communication by wire or radio,
notwithstanding sections 2(b) and 221(b) of the Act.
(8) Communications assistant (CA). A person who transliterates or
interprets conversation between two or more end users of TRS. CA
supersedes the term “TDD operator.”
(9) Hearing carry over (HCO). A form of TRS where the person with the
speech disability is able to listen to the other end user and, in
reply, the CA speaks the text as typed by the person with the speech
disability. The CA does not type any conversation. Two-line HCO is an
HCO service that allows TRS users to use one telephone line for hearing
and the other for sending TTY messages. HCO-to-TTY allows a relay
conversation to take place between an HCO user and a TTY user.
HCO-to-HCO allows a relay conversation to take place between two HCO
(10) Interconnected VoIP service. The term “interconnected VoIP
service” has the meaning given such term under § 9.3 of title 47, Code
of Federal Regulations, as such section may be amended from time to
(11) Internet-based TRS. A telecommunications relay service (TRS) in
which an individual with a hearing or a speech disability connects to a
TRS communications assistant using an Internet Protocol-enabled device
via the Internet, rather than the public switched telephone network.
Internet-based TRS does not include the use of a text telephone (TTY)
over an interconnected voice over Internet Protocol service.
(12) Internet Protocol Captioned Telephone Service (IP CTS). A
telecommunications relay service that permits an individual who can
speak but who has difficulty hearing over the telephone to use a
telephone and an Internet Protocol-enabled device via the Internet to
simultaneously listen to the other party and read captions of what the
other party is saying. With IP CTS, the connection carrying the
captions between the relay service provider and the relay service user
is via the Internet, rather than the public switched telephone network.
(13) Internet Protocol Relay Service (IP Relay). A telecommunications
relay service that permits an individual with a hearing or a speech
disability to communicate in text using an Internet Protocol-enabled
device via the Internet, rather than using a text telephone (TTY) and
the public switched telephone network.
(14) Non-English language relay service. A telecommunications relay
service that allows persons with hearing or speech disabilities who use
languages other than English to communicate with voice telephone users
in a shared language other than English, through a CA who is fluent in
(15) Non-interconnected VoIP service. The term “non-interconnected VoIP
(i) Means a service that—
(A) Enables real-time voice communications that originate from or
terminate to the user's location using Internet protocol or any
successor protocol; and
(B) Requires Internet protocol compatible customer premises equipment;
(ii) Does not include any service that is an interconnected VoIP
(16) Numbering Partner . Any entity with which an Internet-based TRS
provider has entered into a commercial arrangement to obtain North
American Numbering Plan telephone numbers.
(17) Qualified interpreter. An interpreter who is able to interpret
effectively, accurately, and impartially, both receptively and
expressively, using any necessary specialized vocabulary.
(18) Registered Location. The most recent information obtained by a VRS
or IP Relay provider that identifies the physical location of an end
(19) Registered Internet-based TRS User. An individual that has
registered with a VRS or IP Relay provider as described in § 64.611 of
(20) Speech-to-speech relay service (STS). A telecommunications relay
service that allows individuals with speech disabilities to communicate
with voice telephone users through the use of specially trained CAs who
understand the speech patterns of persons with speech disabilities and
can repeat the words spoken by that person.
(21) Speed dialing. A TRS feature that allows a TRS user to place a
call using a stored number maintained by the TRS facility. In the
context of TRS, speed dialing allows a TRS user to give the CA a
short-hand” name or number for the user's most frequently called
(22) Telecommunications relay services (TRS). Telephone transmission
services that provide the ability for an individual who has a hearing
or speech disability to engage in communication by wire or radio with a
hearing individual in a manner that is functionally equivalent to the
ability of an individual who does not have a hearing or speech
disability to communicate using voice communication services by wire or
radio. Such term includes services that enable two-way communication
between an individual who uses a text telephone or other nonvoice
terminal device and an individual who does not use such a device,
speech-to-speech services, video relay services and non-English relay
services. TRS supersedes the terms “dual party relay system,” “message
relay services,” and “TDD Relay.”
(23) Text telephone (TTY). A machine that employs graphic communication
in the transmission of coded signals through a wire or radio
communication system. TTY supersedes the term “TDD” or
“telecommunications device for the deaf,” and TT.
(24) Three-way calling feature. A TRS feature that allows more than two
parties to be on the telephone line at the same time with the CA.
(25) TRS Numbering Administrator. The neutral administrator of the TRS
Numbering Directory selected based on a competitive bidding process.
(26) TRS Numbering Directory. The database administered by the TRS
Numbering Administrator, the purpose of which is to map each Registered
Internet-based TRS User's NANP telephone number to his or her end
(27) Video relay service (VRS). A telecommunications relay service that
allows people with hearing or speech disabilities who use sign language
to communicate with voice telephone users through video equipment. The
video link allows the CA to view and interpret the party's signed
conversation and relay the conversation back and forth with a voice
(28) Visual privacy screen. A screen or any other feature that is
designed to prevent one party or both parties on the video leg of a VRS
call from viewing the other party during a call.
(29) Voice carry over (VCO). A form of TRS where the person with the
hearing disability is able to speak directly to the other end user. The
CA types the response back to the person with the hearing disability.
The CA does not voice the conversation. Two-line VCO is a VCO service
that allows TRS users to use one telephone line for voicing and the
other for receiving TTY messages. A VCO-to-TTY TRS call allows a relay
conversation to take place between a VCO user and a TTY user.
VCO-to-VCO allows a relay conversation to take place between two VCO
(b) For purposes of this subpart, all regulations and requirements
applicable to common carriers shall also be applicable to providers of
interconnected VoIP service.
[ 68 FR 50976 , Aug. 25, 2003, as amended at 69 FR 53351 , Sept. 1, 2004;
72 FR 43559 , Aug. 6, 2007; 73 FR 41294 , July 18, 2008; 76 FR 24400 , May
2, 2011; 76 FR 65969 , Oct. 25, 2011]
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