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Posted by Gray, Charles on January 31, 2008, 10:32 pm
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There is an international standard for the letters on the telephone
dial. It is the ITU-T Recommendation E.161. The title is "Arrangement
of digits, letters and symbols on telephones and other devices that can
be used for gaining access to a telephone network". The current edition
in force is dated February 2002. It even gives the
instructions/dimensions for laying out the "star" and "pound sign"
(called other things in various languages) and dimensions for the raised
round "dot" on the digit 5.
You have to purchase many of the ITU publications, but E.161 is
available free.
Regards.
Charles G. Gray
Senior Lecturer, Telecommunications
Oklahoma State University - Tulsa
(918) 594-8433
| ![[telecom] Letters on the telephone dial](/images/header.jpg)
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