Search found 2 matches

by psychshop
Thu May 01, 2003 5:09 am
Forum: General Discussion
Topic: How to wire telephone as an intercom circuit
Replies: 6
Views: 1096

Re: How to wire telephone as an intercom circuit

For my purposes Chris Smiths suggestion seems to be closest. I have a ready supply of old phones that can't be used on the university PBX. I should have mentioned that the observer needs to speak privately to the interviewer which is why a standard intercom is not an option.
by psychshop
Wed Apr 30, 2003 9:23 am
Forum: General Discussion
Topic: How to wire telephone as an intercom circuit
Replies: 6
Views: 1096

How to wire telephone as an intercom circuit

I need to link an observation room (one way glass ) to the other side via a direct wired phone. This will not connect to any external phone system. Just two regular phones, a power supply, and whatever else is needed to generate the ring tone. I thought I had seen a diagram to do this years ago I wo...