I have two PCM test sets for sale, made by Sony for bench
troubleshooting handsets. Nicely built. They accept 12VDC and have RS232
type connectors as well as BNC audio in and out connectors. I don't have
any documention, but the chipset is fairly common. I will sell for $65
each plus shipping.

--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

"Follow The Money" ;-P