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#642963 06/20/22 02:55 PM
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I'm looking for a Cortelco 2500 pictorial drawing. I connected an dual gong with four wires to the network and it changed the phone so it doesn't hang up.

I understand the older networks had an internal capacitor but since this phone was designed for a two wire ball bearing gong ringer maybe the capacitor has been removed?

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Interesting, the issue likely has to do with resistance being too low when the phone is on-hook.


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Something like this?

Cortelco 50-500-105


Dean
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https://www.instagram.com/deanwilsoncanby/
https://fstoppers.com/profile/deanwilsoncanby
https://www.facebook.com/Dean-Wilson-Photography-112841337020414

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The capacitor is between terminals A and K on the network.
Are you sure that the ringer consists of 2 separate coils, and you have the correct leads for each coil? It sounds like you've put a single coil across Tip and Ring.
Sometimes ringers have 4 wires, but it is still a single coil ringer, 2 of the wires are taps for different impedances, they are taped and stored. One lead goes on Tip, the other on A, and a jumper is placed from K to Ring (or an off-normal hookswitch pair makes the bridge when the handset is in the cradle.

Last edited by Touch Tone Tommy; 07/13/22 11:09 AM.
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