sundance-communications.com Forums Telephony Discussion Phone & VoIP Systems Vodavi Telephones & Systems SLIB04

I think I know the answer, but want to be sure. My home STSe SLT's no longer ring, I'm not positive where the ring voltage comes from but assume from my 4 port SLIB card, but would like to verify that. I've changed slots, no help and the built in SLT ports work fine, that's why I'm fairly confident I'm correct in assuming the ring voltage comes from the 4 port card. Thanks

Yessir, the card has its own ring generator.

Thanks Derrick.

Well, replace the card with a refurbished, which per the seller was tested and I did ask if it was tested for ringing and was assured it was. Seller has good rep. so I'm assuming it's something else. I'm going to see if I can find an SD for this thing also. Any other ideas on this?

I suppose it could be a back plane issue. The early xts KSu had a supplemental ring gen, and there was a cap on the KSU back plane that would blow, not large enough to take the ring voltage. I don't remember an issue like this with the STS. I do seem to remember that some electronic slt ringers would not work with the STS, I could connect a test set to the port no problem, but the slt would not ring.

When putting a butt set on it to monitor all I get is a click when the ring should be present, don't hear the 20hz. You'd think if had anything on the back plane causing it, it would also affect the two built in slt ports. I could find nothing that looked like a fuse on the back plane or the card, but it could be a cap, but I don't see any that look swelled or blown. Of course without a SD I'm flying blind as to how the circuit works.

Only thing I can think of is the card sent RGU was also bad, anyone know if there's a way to test the RGU on the SLIB cards? I hate to call the guy and tell him the cards no good if I can't prove it.

Got another card and it works, I was beginning to think it was something other than the card.