telephone status indicator

Advertisements

this will monitor telephone status without loading the telephone line, this way if you have two phones in parallel you will know if one of them is busy. connect the two ends of circuit in parallel to phone lines.

Related Links Circuits
More circuit about telephone
More about Electronic Control
More circuit LED Display
More about Meter
Circuit Telephone Ringer by IC KA2411
Telephone Amplifier by LF351+TBA820M
Phone â€œHoldâ€ With Music
Telephone Audio Interface
Telephone Record Control

Read more Source:
http://schematics.blogspot.com/2004/10/telephone-status-indicator.html
Thank you.

This entry was posted on Sunday, December 16th, 2007 at 6:17 am and is filed under Electronic Control, Telephone, meter. You can follow any responses to this entry through the RSS 2.0 feed.