Can those pins (or some other pins in the same connector) be used to program the radio or do I have to use the RJ45 connector in the front?
Hi Jeff, no you cannot program a vertex VX-2200 throuhg the DB15 port. You need a programming cable and programming software to do it.
Take a look at this post about how to program a vertex vx-2200.
Hope this helps.
Nicolás