Creating a System Key
Well, someone finally figured out how to create your own system key files. It won't work with MTX800 series radios, but most other radios will like it. No guarantees that this will always work, but it is a start.
You need to fire up your Hex Editor and type in the following:
2C B5 32 B3 88 0D 6A DF 4B B4 E9 95 2C 6D 1C 03 37 24 1F 5B 93 BF 24 1A vw FF yz
In the above data, vw and yz are the bytes you will create with the information below. The "x" in the tables below denotes "don't care".
Save this file with the format "sys0xxxx.key", where xxxx is the same as your Group/System ID/SysID.
|Group ID||"v"||Group ID||"w"||Group ID||"y"||Group ID||"z"|
|Group ID||"vw"||Group ID||"yz"|
Of course, if you can find Motorola's System Key generator, you wouldn't need to create one the hard way...
There appears to be another way around the System Key... sort of.
Some time ago a neat trick was discovered in certain RSS to add/delete talk groups without the "proper" system key. This should work for any DOS based Astro, MTSX, MCS, VisarPP type RSS.
First off, you do need a system key, but it can be any key. Second, you need to have the system you wish to edit already set-up in the radio.
An example would be a service shop who has a system key (let's say system ID "1234") for their own 5 channel StartSite system. This service shop also has some radios set-up with a legit talkgroup on the State-wide SmartZone system (let's say ID "5555") for business purposes. For simplicity, let's assume it's the only system in the radio.
Now, read the radio with regular RSS and go to "trunking systems" (F4,F4,F3 from main menu). The "5555" system is in there as system#1. Now add another system using your legit system key, make it the same protocol (TypeI,II,IIi) and type (SmartNet, SmartZone, AMSS, etc) as the "5555". You don't need to worry about the individual ID, connect tone or control channels.
Once created, go to "trunking personality" (F4,F4,F4 from the main menu). In personality 1, you should see "System/ID......1-5555" second line down on the left. Press "enter" to move the cursor down to the "1-5555" and press either the "up" or "down" arrow on your keyboard. If you are using a slow 386/486 computer, you'll have to wait up to a minute, so be patient and it'll eventually change to "2-1234". You can now go into "F7-talkgroups" and add however many talkgroups you want. "F-10" back out to the personality screen, bring your cursor back up to "2-1234" and hit the arrow key. Soon it'll be back to "1-5555". Check "F7-talkgroups" again. Yep, all your new talkgroups have remained! Go add them to your "zone/channel assignment and have fun!