Hi there I am using the below mentioned cable, never measured the voltage but it works fine. The plastic around the plug is a little big though, doesn't fit so well into the C123. Ben Quoting "labad jala" <labadjala6@gmail.com>:

Thanks again. I measured 4v using a USB/RS232 (U232-P9) adapatator attached to a laptop and also a desktop + "T191" that looks exactly like http://www.cellcorner.com/xshp/unlock-phone-codes/motorola-t190-t191-t193-unlock-data-cable.html.<http://www.cellcorner.com/xshp/unlock-phone-codes/motorola-t190-t191-t193-unlock-data-cable.html>Please, did someone buy this one and had good voltage and results? Regards.