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Solution for Phone-In-Use indicator

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e2k

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I want a "telephone in use" indicator circuit that does not Interrupts internet speed or modem when I am using internet from modem?
 

Re: Need Circuit Help

You have to sense the voltage on the line. If the modem is using the line the voltage will be low 11-17VDC. If the line is available, the voltage will be around 48VDC. So your circuit could easily lockout the phone by activating a relay when the modem is in use.
 

Re: Need Circuit Help

Try "Telephone-related ASCII Schematics" at:
**broken link removed**
and have a look at several options of: "Phone-In-Use indicator" ..

Regards,
IanP
 

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