www.access-board.gov/sec508/refresh/teitac4th/telecom.doc
(a)
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New section
no
In complying with this subpart, each agency shall:
(1) Activate accessibility features and configure telecommunications
products so that they are accessible to and usable by people with disabilities.
(2) Ensure access to and use of all telecommunications relay services
for incoming and outgoing calls as approved by the Federal Communications
Commission pursuant to its authority under 47 U.S.C. Sec. 225, as needed
to achieve functionally equivalent communication access by people with
disabilities.
(a) 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 shall comply with the following:
(1) shall provide a standard non-acoustic connection point for TTYs or an equivalent method for text and/or video conversation, and
(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 shall 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 have 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
shall 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.
NOTE: Terminals covered by this section can be hardware or software
based.
Definition of Terminal: Any device that terminates
one end (sender or receiver) of a communicated signal and with which
an end user interacts is a terminal device.
Or:
Terminal
device or devices with which the end user directly interacts and that
provide the user interface.
(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 [TTY] use.
(x) The user interface of IP terminals that provide real-time voice
communication shall meet the following provisions:
1) IP terminal user interfaces that have a multiline display shall
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
shall allow sending real-time text in the standard real-time text format
for that platform;
3) Such real time text send and receive capabilities shall be synchronized
with voice as part of the same communication session.
CAPTel issue uses modem protocol not recognized by IP gateways. Proprietary
transport protocol. Use of captel in govt. is the problem.
-soft TTY cheap to productize but significant security issues. Secty
fix very costly.
Proposed Definition of real time:
Two-way communcations that employ transmission of , conversational,
remote interactions wherein the characters are transmitted w/in 1 sec.
of time created.
-does CPE include Info Srvc?
Incoming text on screen can be supported, but to support another text
stream wld be challenge.
Need a definition for terminal device. These are suggestions.
For cellphone, New s/w needed to rd text as you go. Addl to
current phone s/w Yes. Trade off w/ tty to head phone prblm,
connector on side.
Allows IP phones to be vco/hco enabled.
Cheaper, easier to do than hardware to t/c products
1194.23(b)
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(1) Products that provide real-time conversation text functionality
shall do so in the standard format that is supported for that transport
medium.
products that connect directly to the PSTN shall support TIA 825 Baudot
where they interface to the PSTN;
Products that connect directly to the Internet via SIP shall support
RFC 4103 where they interface to the Internet via SIP
All other Products
(incl</span><span class="Normal--Char" style=" font-size: 10pt;">uding
PBX, cellular, and peer to peer Internet phones) that do not connect
to PSTN or use SIP over the Internet shall 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).
(x) Systems that support real-time voice communication shall 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:
Provides transmission
of character with less than 1 second delay from entry;
Provides transmission
with less than 1% character error under normal but heavy network traffic;
Support intermixing
of speech and text in both directions (simultaneously if and only if IP based).
d) IP systems cannot rely upon audio channels for transmission
of real-time text.
Push to talk that does not connect to PSTN is not covered.
These reqmts apply to the Gateways to insure interoperablity.
This function is not supported by majority of gateways owned by govt.
today. Anyone with a closed system falls under (c) This is about
insuring interoperability between mine and yours.
s/w is available over the air; reqmt is for gateway vendor to support
this.
Assume high level of understanding by procurement offcr.
-what is systems?
-system perf. Reqmts are net roll up; how does this play w/ component
vendor?
- req robust protocols rather than a metric.
system as delivered must be reliable shld be:
System as purchased should use a reliable text transport format.
There is a concern among some in industry that reference to specific
standards that are proprietary and in early implementation development
is premature. There are also many variations of SIP.
1194.23©
no
(c) Voice mail, messaging, auto-attendant, and interactive voice response
telecommunications systems shall
REVISED ©
(i) Voice mail, messaging, auto-attendant, and interactive voice response telecommunications systems shall make
information available and be capable of recording Baudot TTY signals
and shall
(ii) use the ITU-T
G.711 standard for encoding and storing audio information. If
an audio encoder other than G711 is employed, the vendor must provide
evidence that the intelligibility is