Combined Telecom Real-Time Text Provision Proposals

Contents 1 5. Additional Provisions for Real-time Voice Conversation Functionality 1.1 5-B (NEW) Real-Time Text Reliability and Interoperability (combination of old B and C) 1.2 5-C (NEW) Voice Terminal Hardware and Software (Combine old D and E) 1.3 Questions/Issues with the above 2 OLD CONTENT - USE FOR COMPARISON AND SOURCE 2.1 5-B - Real-time Text Reliability 2.2 5-C - Real-Time Text Interoperability 2.3 5-D - VOIP Terminals and Real-Time Text 2.4 5-E - Voice Terminals without Real-Time Text

5. Additional Provisions for Real-time Voice Conversation Functionality

5-B (NEW) Real-Time Text Reliability and Interoperability (combination of old B and C)

If hardware or software provides real-time voice conversation functionality it must provide at least one means of real-time text communication where the following reliability requirements are met:

1. Products must use a real-time text (RTT) format that meets the following requirements:

1 (a) - RTT format must be the standard real-time text format for the voice platform (one that is supported by all terminal, router, gateway and other products on that platform );

1 (b) - RTT format must transmit characters with less than 1 second delay from entry;

1 (c) - RTT format must transmit text with less than 1% Total Character Error Rate at the peak network traffic specified for intelligible speech transmission (text must work on the network as long as speech does);

1 (d) - RTT format must support intermixing of speech and text in both directions (and support speech and text simultaneously in both directions if IP based);

1 (e) - If product is IP based RTT format must not not rely upon audio tones for transmission of real-time text over IP.

2. Products and self-contained system of all types may use any real-time text format internally that meets reliability provision above as long as it support the following interoperability provisions where it connects to other systems and products:

2 (a) - If product interfaces with PSTN, it must use TIA 825 Baudot where it interfaces to the PSTN.

2 (b) - If product interfaces with other VoIP products or systems (outside of a self contained product-system) using SIP it must support RFC-4103 where it interfaces with other VoIP products or systems. If product uses SIP to interface with VoIP-to-PSTN Gateways it must also support RFC-4351. Gateways must support RFC-4103 and may support RFC-4351.

2 (c) - If product connects to other products or systems using a protocol other than SIP it must use the standard real-time text protocol that meets provision 1 above that has been established for that protocol.

NOTE: All products may support and use other protocols in addition to these as long as the meet the 5 requirements of 5-B(1) above.
NOTE: A self-contained SIP system that all uses the same real-time text protocol can be treated as a single product and can use any protocol internally as long as it supports RFC-4103 where the system-product connects to other systems or products.

5-C (NEW) Voice Terminal Hardware and Software (Combine old D and E)

Terminal hardware or software that is capable of providing voice communications in real-time must comply with the following:

1. If hardware or software provides voice conversation over IP in any form, and has a user interface with a multi-line display or runs on devices that have a multi-line display,
   • then terminal must display any real-time text that is received if it is received in the standard real-time text format for that [voice transmission format or platform].
2. If terminal hardware or software provides voice conversation over IP in any form, and has text generation capability,
   • then the terminal must allow user to send real-time text in the standard format for that voice transmission format in parallel with the voice.
3. If IP voice terminal hardware or software does not provide real-time text send and receive capability
   • then the terminal must support the addition of terminals and terminal peripheral equipment that do support real-time text functionality in conjunction with the voice call functionality, in the same location and with the same permissions for use as their voice terminal. If the terminal is in a pubic or shared area and not in an individual's private work area then the connection must be possible without requiring system-administrator intervention.
4. If terminal is analog or TDM-digital wired terminal
   • then it must support the connection of a TTY via an RJ-11 jack in the same location and with the permissions for use as the telephone and it must be capable of allowing simultaneous speech and text conversation without interference or its microphone shall be capable of being turned on and off to allow the user to intermix speech with text use.

Note: Provision of the RJ-11 jack may be accomplished by through one of the following techniques:

• provision of the RJ-11 jack on the telephone,
• the use of a Y-adapter that allows both the analog telephone and the TTY to be plugged into the same line outlet,
• having built in capability to support an RJ11 module that can provide a connection point for TTYs;

Revised Definition of Terminal

Terminal

Device and/or software with which the end user directly interacts and that provide the user interface.
NOTE: For some systems, the software that provides the user interface may reside on more than one device such as a phone and a server.

Questions/Issues with the above

5C (new) #3 bullet

• Software can do half of job of supporting peripheral but not the connection part. What can we do to make it clear what is sufficient for software to meet this provision.

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OLD CONTENT - USE FOR COMPARISON AND SOURCE

5-B - Real-time Text Reliability

There are 2 proposed versions, not settled within Telecom SC:

Version 1: Systems that support real-time voice communication must support at least one standard (for the system) means for real time text communication that is supported by all terminal, router, gateway and other products on that system, and that meets the following requirements:

1. Provides transmission of characters with less than 1 second delay from entry;
2. Provides transmission with less than 1% Total Character Error Rate under peak non-crisis network traffic;
3. Support alternating speech and text in both directions on non-packet based systems and simultaneously speech and text in both directions on packet based systems.
4. IP systems cannot rely upon audio channels for transmission of real-time text. {can delete 5 if interop provision and peak traffic clause are retained.

Version 2 (Trace Alternate Proposal): Real-time voice communication systems must support at least one means for real-time text communication that:

1. Is standard for the system and supported by all terminal, router, gateway and other products on that system; and
2. Provides transmission of characters with less than 1 second delay from entry; and
3. Provides transmission with less than 1% Total Character Error Rate under peak non-crisis network traffic; and
4. Supports intermixing of speech and text in both directions (simultaneously if and only if IP based); and
5. If it is an IP based system, does not rely upon audio signals for transmission of real-time text.

Status: In Progress
Source: New

Discussion: A system may be standard or proprietary but it includes all products that use that system. This version allows use of audio channel for text data

5-C - Real-Time Text Interoperability

There are 3 proposed provisions, not settled within Telecom SC:

Version 1 Products that provide real-time text conversation functionality must do so in the standard format that is supported for that transport medium.

1. Products that connect directly to the PSTN must support TIA 825 Baudot where they interface to the PSTN;
2. Products that connect directly to the Internet via SIP must support RFC 4103 where they interface to the Internet via SIP;
3. All other Products (including PBX, cellular, and peer to peer Internet phones) that do not connect to PSTN or use SIP over the Internet must support the standard real-time text format for that system. These systems only need to support TIA 825 Baudot at the juncture to the PSTN (if any) and only need to support RFC 4103 at the point where they connect to public SIP systems (if any).

Version 2 (Trace Proposal); Products that provide real-time text conversation functionality must

1. provide real-time text functionality in the standard real-time text format that is specified for that system
2. use TIA 825 Baudot where they interface to the PSTN
3. support both RFC-4103 and RFC-4351 where they interface to other VoIP systems or to the Internet via SIP

Note: Closed systems, where the real-time text format of all the components is controlled and identical, may use any real-time text format that meets provisions for (Real-time Text Reliability) and (Real-time Text Interoperability).

Version 3 (TIA Proposal): Products that provide real-time text conversation functionality must do so in the standard format that is supported for that transport medium and provide level of service that does not exceed 1% Total Character Error Rate under normal network conditions.

1. Products that connect directly to the PSTN, including packet based systems, must support TIA 825 Baudot where they interface to the PSTN.
2. Packet based systems must support real-time text communication between text capable terminals.

Status: In Progress
Source: New

5-D - VOIP Terminals and Real-Time Text

The user interface of IP terminals that provide real-time voice communication must meet the following provisions:

1. IP terminal user interfaces that have a multiline display must display any real-time text that is received in the standard format for that platform.
2. IP terminal user interfaces that have the ability to generate text must allow sending real-time text in the standard real-time text format for that platform.
3. Such real time text send and receive capabilities must be synchronized with voice as part of the same communication session.

Status: In Progress
Source: New

5-E - Voice Terminals without Real-Time Text

There are 3 proposed provisions, not settled within Telecom SC:

Version 1: Telecommunications terminals and other terminals capable of providing real-time voice communications which do not themselves provide TTY or other real-time text conversation functionality must comply with the following:

1. All analog and TDM-digital wired terminals must support the connection of a TTY in the same location and with the permissions for use as the telephone. This must be accomplished by:
   • Providing an RJ-11 jack on the telephone, or
   • For an analog telephone, by the use of a Y-adapter that allows both the analog telephone and the TTY to be plugged into the same line outlet, or
   • Having built-in capability to support an RJ11 module that can provide a connection point for TTYs.
2. Other types of terminals covered by this section must support the connection of real-time text capable devices in conjunction with the voice call capability in the same location and the same permissions for use as the terminal.
3. These products must either:
   • Be capable of allowing simultaneous speech and text conversation without interference or
   • Its microphone must be capable of being turned on and off to allow the user to intermix speech with text use.

Version 2 (NEW TIA PROPOSAL): Telecommunications products or systems [terminals and other terminals capable of providing real-time voice communications which do not themselves] provide TTY or other real-time text conversation functionality must comply with the following:

1. All analog and TDM-digital wired terminals must support the connection of a TTY in the same location and with the permissions for use as the telephone. This may be accomplished by:
   • Providing an RJ-11 jack on the telephone, or
   • For an analog telephone, by the use of a Y-adapter that allows both the analog telephone and the TTY to be plugged into the same line outlet, or
   • By having built-in capability to support an RJ11 module that can provide a connection point for TTYs.
2. Packet based telecommunication systems must support the addition of terminals and terminal peripheral equipment that support real-time text functionality in conjunction with the voice call functionality in the same location and with the same permissions for use as the terminal.
3. These products must either:
   • Be capable of allowing simultaneous speech and text conversation without interference, or
   • Its microphone must be capable of being turned on and off to allow the user to intermix speech with text use.

Version 3 (TRACE PROPOSAL): Terminals capable of providing real-time voice communications that do not themselves provide TTY or other real-time text conversation functionality shall comply with the following:

1. All analog and TDM-digital wired terminals shall support the connection of a TTY in the same location and with the permissions for use as the telephone. This may must be accomplished by providing an RJ-11 jack on the telephone, or, in the case of an analog telephone, by the use of a Y-adapter that allows both the analog telephone and the TTY to be plugged into the same line outlet, or by having built in capability to support an RJ11 module that can provide a connection point for TTYs;
2. Packet based telecommunication All other real-time voice communication systems shall support the ad hoc addition of terminals and terminal peripheral equipment that support real-time text functionality in conjunction with the voice call functionality in the same location andwith the same permissions for use as their voice terminal.
3. Shall be capable of allowing simultaneous speech and text conversation without interference or its microphone shall be capable of being turned on and off to allow the user to intermix speech with text use.

Status: In Progress
Source: {508}1194.23(a)