How To Program Your Motorola Solutions CLS Series Two-Way Radios 

Yes, you just change that program setting on those specific radios. Please reference the call tone setting at the 4:05 mark in the video.

Have you tried changing the "active channels" option in the programming menu?

We recommend that most people avoid using the first 20 frequencies when programming. Have you considered switching over to a digital radio, such as the DLR series? The digital technology will help eliminate some of the background noise as well as interference.

We cover this at the 4:05 mark

Any UHF business class analog radio will work with CLS radios

P S you need a business band license to use.