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???
05/05/06 06:03
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#115627 - Did not search first
Responding to: ???'s previous message

Nandhu Kumar said:

How to detect call progress tones ... i am using mt8888 ic

So let's have a quick look at what the manufacturer's website has to say about that chip, shall we:

The MT8888 is a monolithic DTMF transceiver with call progress filter ... A call progress filter can be selected allowing a microprocessor to analyze call progress tones ...
Features

Central office quality DTMF transmitter/receiver

Low power consumption

High speed Intel micro interface

Adjustable guard time

Automatic tone burst mode

Call progress tone detection to -30 dBm
http://products.zarlink.com/product_p...T8888C.htm

So a "Didn't Search First" vote seems perfectly valid - the answer to "How to detect call progress tones" will be in the device Datasheet!

So, go and read the Datasheet. Also read the Zarlink application notes. Also search here for the very many previous threads on this same subject - even this same chip.

Then, if you still have a specific question, come back and ask!

List of 4 messages in thread

Topic Author Date
detecting call progress tones              01/01/70 00:00
   where you entered your post it read              01/01/70 00:00
   May not work in India              01/01/70 00:00
   Did not search first              01/01/70 00:00

Back to Subject List

Topic	Author	Date
detecting call progress tones		01/01/70 00:00
where you entered your post it read		01/01/70 00:00
May not work in India		01/01/70 00:00
*Did not search first*		01/01/70 00:00