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Model Number of Line Relay

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dramrattan

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Hi,

I'm trying to automatically answer a phone after a certain number of rings is reached. I found a circuit which i attached (Page 2 of the article) that uses a line relay to open the line when this specified number of rings is obtained but don't know what model number it is. Could someone help me determine a model i can use for this situation?

Also, a transformer is connected to the telephones lines L1, L2. What model of transformer i could use to do the same?.
 

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dramrattan

New Member
Line Relay

Yea there are laws against hooking up equipment to telephone lines. It's my final yr project i'm trying to do some research for here so its no worries in hooking it up for this purpose. The relay looks good. Any clue of what transformer i could use?...Any 1:1 ratio transformer would work?
 

dramrattan

New Member
Transformer

Thanks blueroomelectronics for the great link. I think i will try to implement the ETAL P2100 Line Matching Transformer in my application.
 
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