Don't buy eartec's wireless. It is truly crap. I have posted on that stuff before, read my posts their and the posts that follow... Andy has some things to say about those.There are several threads on this topic for you to check out like these two:
I saw this product at LDI and was very impressed with it however I still haven't found a customer who actually owns it. http://www.eartec.com/ For about $2200 you can get a kit that includes three digital full duplex wireless headsets and an interface that simply plugs into any wired clearcom jack. They also can operate independantly as their own freestanding full duplex wireless system. It looked really slick but I would really like to hear a first hand recomendation before buying one.
I have mixed and matched Telex and Clearcom boxes on both telex base stations and clearcom base stations and have never had a problem, and have never opened up either of them to throw a jumper.I'm not totally sure whether Clear Com and Telex are related but at the very least there is more difference than just logos. For example, if memory serves me, Clear Com wired systems work on unbalanced system, where as Telex wired work on a balanced system. I know that the Telex body packs are compatible with both types, however there is a jumper inside the pack that needs to be changed to work with a Clear Com system. This is at least true on the newer Telex stuff.
Just to clarify, again, they are NOT the same product. They are products which, if set to a certain mode of operation, are compatible (with the exception of call signals). They are not in any way, shape, or form the same product, however, and in balanced mode, a Telex AudioCom system will NOT be ClearCom compatible at all.