Thread Subject: Re: (no subject)
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From: Paul E. Jones
Date: Tue, May 15 2007 12:25 PM
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Mary,
The first definition covers both the device and also operational modes or
common usage of the device. So, I would personally separate the two. I
think the alternative definition below is more appropriate.
I would exclude the reference to TIA 1001, since that does not define a TTY.
Rather, it is defined to provide a means of transporting text over IP
between two gateway devices.
Paul
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Mary-AMB004
Sent: Monday, May 14, 2007 10:52 AM
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Subject: [teitac-telecom] (no subject)
The Subpart A working group has a definition of TTY which is currently
defined ( <http://teitac.org/wiki/Subpart_A_Report_2007-04-18>
http://teitac.org/wiki/Subpart_A_Report_2007-04-18) as follows:
An abbreviation for teletypewriter. Machinery or equipment that employs
interactive text based communications through the transmission of coded
signals across the telephone network. As used in this part, the term TTY
includes text-to-text communications along with voice and text intermixed
communications such as voice carry over and hearing carry over. TTYs may
include, for example, devices known as TDDs (telecommunication display
devices or telecommunication devices for deaf persons) or computers with
special modems. TTYs are also called text telephones.
There is a conversation in TIA that this may be a too broad definition and
might include non-standard proprietary coding or really any text messaging
(IM) service one could imagine. A possible modification of the definition is
below. I would like for the Telecom WG to discuss this in today's call.
An abbreviation for teletypewriter. Machinery or equipment that employs
interactive text based communications through the transmission of coded
signals across the public switched telephone network in compliance with
TIA-825-A, A Frequency Shift Keyed Modem For Use On The Public Switched
Telephone Network; [or across an IP network in compliance with TIA-1001,
Transport of TIA-825-A Signals over IP Networks.]
Mary Brooner, Telecom WG Co-chair
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