I've used OTAP on my NexEdge trunked system. I love it. You just modify the file and push it out to the radio. Saves a lot of work. It only works in NXDN mode, not analog, though.
Software is taking some getting used to, but it isn't bad. My first programming experience was the old DOS MTS-2000 software for a trunked system. After that, -everything- is easier/better.
The basic radio includes analog, NXDN conventional and NXDN Type C (NexEdge) trunking. That's included in the base price.
The options are numerous, but adding P25 and P25 conventional are license options, so you just buy it as you need it.
Agree, in fire service there is no place for encryption, unless your fire investigators want it. The NXDN 56bit DES encryption is included in the basic package, so its already there. Voice Inversion scrambling on the analog side is also included, but I digress....
In NXDN mode the radios send out their ID with each and every transmission. That ID could be a unit number, vehicle number, someones name, pretty much anything you want. Most of my radios here are either programmed with the users name or the department name/unit number.
The radio will do MDC1200 and FleetSync in the basic package.
If you are looking for an analog VHF radio there are a few options. For public safety where you have the (even remote) possibility of needing P25 some day, this one is a good option. You can purchase the basic radio now and add P25 -IF- the need arises. I also believe this radio would meet the requirements for federal grant funding, which usually requires a radio be "P25 capable".
While not related, I do have about 400 Kenwood radios on my trunked system. About 350 NX-410's portables and 50 NX-900 mobiles. Out of all those radios I've had two failures in 4 years. One was a dead display out of the box. The other was an unidentified RF issues. I've been very happy with those numbers. Also Kenwood has been really bending over backwards to keep us happy. Compared to the "other company" we used to use, it's night and day and I'd never got back to Motorola.
About a year ago I switched our PD over to Kenwood radios. Our officers are all carrying NX-210 VHF portables and the vehicles are TK-5710's. They were really happy with the radios. I had no less than 3 officers tell me how much better the audio was compared to their previous MTS-2000's and XTS-2500's. We just put a NX-5700 mobile in one of their transport vans and they like it.
I'm probably going to requisition myself an NX-5300 for my own use next fiscal year.