Does anyone know the pin outs for the Polycom Sound Station I.

It has an 8 pin lead and I can't find any info on it.

I can draw dial tone on the 4 & 5 pins but the dial tone fades away in a few seconds.

If I add a jumper from pin 5 to pin 8 I can hold dial tone but then I can't break dial tone to dial anything.

Any ideas?


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