I bought a few cheap fobs on Ebay a while back. There's no discernable IC mounted on it. It's a very small PCB with a "blob", USB and 3.5mm audio connectors, several SMT components, 2 electrolytic caps, and a crystal. The packaging has a few clues: CV060CF and CT023CF. If these could be recognized by Asterisk, what would I do for PTT, COS? I'd be happy to use my homebrew Rigblaster with RS232 or with an RS232 to USB adapter. 73. Kyle K0KN nearly as concerned with COS/PTT