I have headed up a venture to migrate a small police department to digital (NXDN specifically) while still operating with other agencies who are analogue on the same frequency. This has been quite the adventure as I had no knowledge of radio communications when this started 5 months ago. I have successfully made it happen though and gained a lot of knowledge along the way but I am far from being an expert. I need some advice but I need to explain the operation a little to preface my question. All other agencies in our county operate on one frequency and all others are still analogue. Someone told me previously that the FCC would not allow this but our licensing and buildout were both granted by the FCC. We established our own frequency pair and put up a repeater in the center of our city. A local radio shop built a crosspatch into the repeater using a TK-8180 in conjunction with an Arcom RC 210 controller. In our patrol vehicles we are operating the NX-3820. Both the analogue frequency and our digital frequency are operating in UHF. If we turn the 8180 at the repeater off, we are able to operate locally without the crosspatch to the other agencies and dispatch. Turn the 8180 back and and we are connected to the analogue system again. The problem we have now is that when we talk on our local digital frequency, we are limited to whatever channel the 8180 connected to the repeater is on. If we needed to switch frequencies to talk to say the fire dept or EMS frequency, someone would have to drive to the repeater site and turn that 8180 to that channel to make that connection. I want to use autodialing with DTMF tones to be able to turn the channel on that base radio. From what I am seeing this is very simply done in the 8180 which is what we also previously had in our cars but of course are not digital capable. I am not seeing anything about the 3820 having this same capability to send the DTMF tone back to that older 8180 to turn the channel. Am I missing something? I am sure Kenwood would not revert backwards and take that technology away in a newer more advanced radio. They also sell the keypad mic as an accessory for the 3820 and I cant think of another application for these mics if these radios are not capable.