Most partyline manufacturers provide some form of compatibility with Clear-Com systems systems
Tecpro / ASL all offer products that are compatible with Clear-Com (in terms that they will connect and pass audio). Call signalling and remote mic kill functions may not be compatible across different bands
The simple answer is yes the RS-601 will work on a ASL system However the call signal may not work and there maybe differences inaudio in audio levels between the units because of different impedance Here is a good link and the main extract from the page below, http://www.blue-room.org.uk/wiki/Comms CompatibilityClear Compatibility Clear-Com, Tecpro, ASLand ASL and Stonewood are all broadly compatible although you may find differences involume in volume between users of different brand belt packs or other types of station ina in a mixed system.