DTMF 2100 Hz Answer Tone

[Steven Tsui]

Hey all,

I need some detail information on the DTMF 2100 Hz answer tone. I
read the datasheet for Motorola MC145446A, it said that the device can
be used in answer tone mode but no much detail is given with regards to
this. I would like to acquire more information in general about this
DTMF
2100 Hz answer tone. Will it allow full duplex DTMF communication on a
single wire ?

Thanks!!!

Steven

[Lord Garth]

Steven,
If the tone is DTMF (Dual Tone Multi Frequency) what is the other tone?
This sounds like you want a call progress tone decoder/generator.

Jon

Steven Tsui wrote in message <36DB6375...@cityu.edu.hk>...

[dr.d...@juno.com]

In article <36DB6375...@cityu.edu.hk>,

Steven Tsui <ees...@cityu.edu.hk> wrote:
> Hey all,
>
> I need some detail information on the DTMF 2100 Hz answer tone. I
> read the datasheet for Motorola MC145446A, it said that the device can
> be used in answer tone mode but no much detail is given with regards to
> this. I would like to acquire more information in general about this
> DTMF
> 2100 Hz answer tone. Will it allow full duplex DTMF communication on a
> single wire ?
>
> Thanks!!!
>
> Steven
>
>

2100 Hz tones are used for specal C.O. signaling and not for DTMF or to and
from phones. The exception is certen military field telephone systems. dr.d
Kiss Technologys The more complicated the plumbing the easer it is to stop up
the pipes M. Scott

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