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!
These tones are defined by the local telecommunications regulatory authority; Austel, FCC, etc. There is no one international standards document.
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
The ITU used to publish the information in their documents
Alan
-- Sell your surplus electronic components at
None of those agree with the tones used in the US, which are all below 1kHz.
don
Regarding the 2 CCTIT systems I'm familiar with here are the values which should correspond to those in the US
CCTIT No.3 CCTIT No.4 Busy tone 2280Hz +OR- 6Hz 2040Hz,2400Hz, 150+or-30 ms 600ms + OR -120ms 2040+OR-6Hz,
100+OR-20ms Ring 2280Hz +OR- 6Hz 2040Hz,2400Hz, 150+or-30 ms 150ms + OR -30ms 2040+OR-6Hz, 100+OR-20ms Silence 100+OR-20ms 2040+OR-6Hz, 100+OR-20ms 2280Hz +OR- 6Hz 150ms + OR -30ms
Your comments are not relevant. It's unfortunate you did not observe that the OP was NOT asking about interoffice signaling.
Learn to read. Your comments are not relevant to the subject.
Thats why I indicated that they are CCITT codes which is also known as the International Telecommunications Union.
CCITT = International Telecommunications Union Not only used for international traffic but also for submarine communications, land based cable and microwave links. Ummmm ...You claim? So what do they use now? That is what the Op is asking and no one has given him an answer till I wrote .
It will work just as well as with a multifrquency dial phone if you connect up a 1 to 10 pulse dialling phone there.
I can see you are confusing dialing modes/frequencies with busy tone and ringing frequencies. Now ... CCITT specs give 2 seperate frequencies ranging from 700Hz to
1500Hz) summed together to send a single number. Now a third tone is also used but ... i think i've said enough."Go easy with the whisky"
theJackal
WRONG! Try getting a C1 line on a type 2002 channel. You can go upto
3KHz."Go easy on the whisky"
theJackal
Oops sorry I missed that. Valuable site and nice information .
"Go easy on the whisky"
theJackal
Watch TV it will educate you more
"If you believe everything you read, better not read." "Go easy on the whisky "
theJackal
ha ha the great instructor has spoken.
Most men are within a finger's breadth of being mad.
Diogenes
"Go easy with the whisky"
theJackal
Those are all "inter-equipment" tones used for long distance signalling. The UK used to use 2280 extensively many years ago while the 2040/2400 tones were used for signalling between countries in Europe.
The UK 2280 system used "decadic" dialling (ie 1 to 10 pulses) for dialling the numbers with various other tone lengths for control signals (ie call answer).
The 2040/2400 system was basically a four bit binary with one tone representin 0 and the other representin 1. The number was sent as a series of four tones. This gave a total of 16 possible combinations some of which were used for control.
Alan
-- Sell your surplus electronic components at
But I already gave the OP a link to :
where there is a pretty comprehensive list of the tones a telephone subscriber would hear, not the tones which are used inter-equipment.
Alan
-- Sell your surplus electronic components at
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