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Joined: Nov 2009
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I have a KX-TA824 and am using a USB to phone interface from Parliant. The interface generally works ok. But, since I have placed the interface on a station line it no longer receives caller-ID. I am reasonably sure the problem is the difference between the station line voltage and regular POTS line voltage. On my PBX I measure ~-28v tip to ring.

I had pretty much given up getting any resolution - the vendor says their product is intended for CO lines - and then I found this forum.

So, my question is... Has anyone succeeded in finding a way to "adapt" -48v devices to work on a station line like on the 824, or "adapt" the station line to provide -48v?

Any ideas appreciated.

Richard

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Gees if the guy that built says it's to be used a certain way, maybe thats what they want it to do.

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If the phone works I don't see why it would affect CID
what format does it receive CID dtmf or fsk
don't know the unit you are using but if it is using the ext as a standard telephone you have to turn on CID to slt on the system


“I have not failed. I've just found 10,000 ways that won't work.”
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Thanks OBT. I believe I have isolated the issue to the line voltage. The USB interface works on CO lines, and a standard analog set with CID works when hooked up as a station. For this application, the USB interface is connected directly to the PBX as a standard 1-pair SLT, not as a PT.

I am pretty sure there is no resolution to this problem, but, given the depth of experience on this board, I figured that if there was an answer (like some obscure PBX option), this would be the place to find it.

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the only way I know to up the voltage is to put a battery in series with the extension and the telephone, normally used to boost the distance on an extension on a long line. Do this wrong you will blow the system.
I am not advising you do this, just telling you this is what was done before IP extensions took away the need for distance on tie lines,


“I have not failed. I've just found 10,000 ways that won't work.”

Moderated by  Carl Navarro, OBT 

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