I've been all over the internet looking for an answer tooth's question but I've come up empty. Here's my problem: I have (3) EFJ 5100 and Motorola cp200d. The Motorola is one of 4 we use for pit to car communications. All the motorolas talk to each other on frequency 466.xxx. All the EFJ's talk to each other on frequency 466.xxx. All are set up as digital channels But the EFJ and the Motorola won't talk to each other. There are no privacy codes programmed into the Motorola. I'm pretty sure I haven't programmed any into the EFJ. When I press the PTT on the EFJ the motorola blinks green. Nothing happens the other way around but a bit of static. They are trying to talk to each other. What am I doing wrong? Thank you in advance for any help