Western Electric 620 KSU Questions - 09/25/08 11:35 AM
Hello, I've been doing a lot of learning via this forum, a little reverse engineering, and a lot of guessing but now I need some help from the experts...
I have a WE 620A2 KSU with a 79B5 power supply that I've cobbled back into partial operation just for fun. There are a mix of 400D, G, and H cards that appear to work. I've been using some San/Bar line cards for experimenting since I can't track down jumper settings for the 400G and H cards.
I'm having a hard time getting the ringing to work the way I want. If I jumper the San/Bar line card to "constant ringing" it works just as expected, the phones ring without any pauses. Now when I jumper to "interrupted ringing" - no ringing.
Here is the odd part... when the jumper is on "interrupted ringing" it puts out interrupted 10 VAC 60 Hz lamp voltage as the ring signal. For fun, I hitched up a buzzer and it buzzes that, but I want the bells to ring! :bang:
I started tracing wires and both the 30 Hz uninterrupted and interrupted ring voltage does make its way back to the top terminal on the KSU. However, the interrupted 30 Hz never goes to the line cards.
Is there some kind of jumper in the 620 KSU that lets you change between interrupted 10VAC 60Hz buzzer ringing or high voltage 30 Hz bell ringing?
I should also add that the terminal wiring on the top of the 620 looks like somebody might have messed with it. There are some ugly "blobulous" looking solder joints on those wires.
Thanks for taking the time to read through this. I'm sure I will have a bunch more questions.
-Ryan
I have a WE 620A2 KSU with a 79B5 power supply that I've cobbled back into partial operation just for fun. There are a mix of 400D, G, and H cards that appear to work. I've been using some San/Bar line cards for experimenting since I can't track down jumper settings for the 400G and H cards.
I'm having a hard time getting the ringing to work the way I want. If I jumper the San/Bar line card to "constant ringing" it works just as expected, the phones ring without any pauses. Now when I jumper to "interrupted ringing" - no ringing.
Here is the odd part... when the jumper is on "interrupted ringing" it puts out interrupted 10 VAC 60 Hz lamp voltage as the ring signal. For fun, I hitched up a buzzer and it buzzes that, but I want the bells to ring! :bang:
I started tracing wires and both the 30 Hz uninterrupted and interrupted ring voltage does make its way back to the top terminal on the KSU. However, the interrupted 30 Hz never goes to the line cards.
Is there some kind of jumper in the 620 KSU that lets you change between interrupted 10VAC 60Hz buzzer ringing or high voltage 30 Hz bell ringing?
I should also add that the terminal wiring on the top of the 620 looks like somebody might have messed with it. There are some ugly "blobulous" looking solder joints on those wires.
Thanks for taking the time to read through this. I'm sure I will have a bunch more questions.
-Ryan