What is the frequency of callwaiting in telephone system ?

haerifar · Mar 18, 2004

callwaiting tone ???

what is the frequency of callwaiting in telephone system ?
and how can i detect it ?
:?: :?:

kang_computer_01 · Jun 19, 2005

Re: callwaiting tone ???

you can detect the signal of ringing tone to send to phone so that by PLL

stephen_h · Jun 19, 2005

Re: callwaiting tone ???

haerifar said:
what is the frequency of callwaiting in telephone system ?
and how can i detect it ?
:?: :?:

Modern Detection is used by DSP techniques as there will have near-end voice to "jam" the Call waiting FSK signalling.

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