Jberryman

Thanks a bunch for the link, I've been looking for something like this. I'm sorry, the drawings are a bit confusing. If it helps any, I should have stated that the green dot represents the tip and the red dot represents ring, the pair on the left being line 1 and the pair on the right being ring and tip for line two. thanks again

Thanks for the response, MP. The transformer that I referred to was for bridging the two lines. Why is it necessary to isolate this from the phone line? Sorry for my ignorance, but could you explain quickly what you mean by "draw too much current"? As for affecting the service of other phone customers, there's no way that anything connected to a POTS line can cause problems at the CO that would affect other people's service. Except for the connection between LINES 1 and 2, I don't see how this circuit differs from a basic telephone. Thanks for your help

Hi everyone. I've just begun to learn about electronics and wanted to try my hands at making a diverter (or rather a variation on a design that I found), and I could use some help. The purpose of this circuit is to connect two phone lines together so that when you call LINE 1 you get the dial tone of LINE 2 and can send DTMF and talk just as if you had dialed out of LINE 2 directly. I appologize in advance for my butt-ugly illustrations and general newbiness; the drawings are meant to just show the basic logic, as that's enough for me to worry about at the moment. This is the first sketch I came up with: To explain: In the position shown, both lines 1 and 2 are "on hook". I dial up the number for LINE 1, the CO sends AC (ringing) current to line 1 and the capacitor allows current to flow into the full wave bridge rectifier, sending DC through the relay. This closes both circuits in LINES 1 and 2, LINE 1 stops "ringing" and allows DC to flow through LINE 1 and through LINE 2. Now it is LINE 2 that is keeping the relay open. Both lines are now "off hook". The gold blotch represents the undefined connection between the two lines that is the purpose of the circuit. I have been trying to find information about DC coupling but it all seems very complicated. The design that I initially found used a 600ohm-600ohm transformer, but is there an easier way? what would happen if you connected them with a bit of wire? Now when the call is completed and whoever LINE 2 calls hangs up, the CO will initiate a polarity reversal on LINE 2 that will cause the circuit to collapse and reset. There is a problem if LINE 2 dials something that never hangs up, however... Which leads me to v0.2: Now this may be crazy, I don't know. But in this design, when the relay is thrown, LINES 1 and 2 are connected in a figure eight or infinity symbol shape, with RING of LINE 1 flowing into TIP of LINE 2 and vice versa. This way, a polarity reversal on either end will reset the circuit and I don't have to learn about coupling. Does either design make sense? If not why? Any advice you can give me, even to tell me what to go about reading into would be great. Thanks