Tagged Questions

1
vote
3answers
693 views

How to create a multi-extension intercom system using wired phones?

I want to create a simple (telephone based) intercom system in our new house. Shouting between rooms is not so good, and trying to use an IM client or Facetime doesn't have the immediacy of a good ...
2
votes
1answer
181 views

Analog Telephone Frequency Response Curve

Old analog telephone circuits using carbon microphones seem to be said to have a frequency response of, from various low frequencies which differing reports put at between 275 Hz and 400 Hz, up to ...
0
votes
1answer
371 views

How to build a telephone answering machine with caller id

I'm brand new to electronics. I'm interested in building my own telephone answering machine with caller id receiver from scratch as a learning project. How would you suggest I get started?
2
votes
2answers
1k views

Phone line to 3.5mm audio line

I need to splice out the audio feed from the hand set line (4P4C jack) to a 3.5mm audio port on a computer to interoperate the call via speech recognition. I do not meddle around too much with analog ...
0
votes
2answers
220 views

Connect IPOD audio output to old rotary telephone

I hope you could help me. I want to connect the audio output of an IPOD to an old rotary telephone. The telephone is not connected to the telephone line, it's just a fancy design thing I would like to ...