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eeh
Guest
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 Posted:
Mon Dec 12, 2005 9:19 am Post subject:
Telephone line tone specification |
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Hi,
Do anyone know where I can find the telephone line tone specifications
about the ringing tone/interval and busy tone/interval in different
countries such as US and England and France and Germany and Japan?
Do it has some standards such as IEEE spec or else?
Thanks!
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Guest
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| Posted:
Mon Dec 12, 2005 9:23 am Post subject:
Re: Telephone line tone specification |
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| Quote: | Do anyone know where I can find the telephone line tone specifications
about the ringing tone/interval and busy tone/interval in different
countries such as US and England and France and Germany and Japan?
|
These tones are defined by the local telecommunications regulatory
authority; Austel, FCC, etc. There is no one international standards
document. |
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Alan
Guest
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| Posted:
Mon Dec 12, 2005 9:35 am Post subject:
Re: Telephone line tone specification |
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On 11 Dec 2005 19:19:15 -0800, "eeh" <eehobbyist@yahoo.com.hk> wrote:
| Quote: | Hi,
Do anyone know where I can find the telephone line tone specifications
about the ringing tone/interval and busy tone/interval in different
countries such as US and England and France and Germany and Japan?
Do it has some standards such as IEEE spec or else?
Thanks!
|
The ITU used to publish the information in their documents
www.itu.int
Alan
--
Sell your surplus electronic components at
http://ozcomponents.com
Search or browse for that IC, capacitor,
crystal or other component you need.
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Don Bowey
Guest
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| Posted:
Mon Dec 12, 2005 5:35 pm Post subject:
Re: Telephone line tone specification |
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On 12/11/05 7:19 PM, in article
1134357554.995851.174120@g43g2000cwa.googlegroups.com, "eeh"
<eehobbyist@yahoo.com.hk> wrote:
| Quote: | Hi,
Do anyone know where I can find the telephone line tone specifications
about the ringing tone/interval and busy tone/interval in different
countries such as US and England and France and Germany and Japan?
Do it has some standards such as IEEE spec or else?
Thanks!
|
In the USA and Canada, there were so many tones used in so many ways in
different types of switching machines that it wasn't realistic to create a
Standard for them, so the tones and methods were placed in an Appendix of
ANSI T1.401-1993, which has probably been updated a few times by now. An
Appendix is used to convey information, but it contains no requirements.
ANSI T1.401 is the Standard for the interface between Carriers and their
customers for Loop-Start and Ground-Start signaling (basically, think POTS).
All of this work was harmonized with Canada's CSA, by our illustrious
Chairman, who was Canadian.
Special Information Tones (SIT) and the related messages, is contained in
ANSI T1.209.
Don |
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