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Over the years various models of Radio Shack intercoms varied in quality and reliability. In reviewing many different models the [[RadioShack 14 Channel FRS Base Station 21-1845]] seemed to have the greatest overall appeal for most home or small office setups. The use of CTCSS tone encoded squelch helped to overcome some of the issues with FRS congestion in urban settings however, did not provide any actual privacy. The units required frequency and tone set by small dip switches on the bottom, which might be too confusing for some users this had some clear advantages. Later models suffered from "too many buttons" on the top and could easily be tuned off frequency by accident. As long as you had one competent person in the office or family to set the dip switches, you could be more confident every intercom remained on the correct channel with the correct CTCSS tone setting. As long as you did not discuss private matters on the intercom system, these units really were some of the best wireless intercoms ever produced by anyone.Over the years the many models of Radio Shack intercoms varied in quality and reliability. In reviewing many different models the [[RadioShack 14 Channel FRS Base Station 21-1845]] seemed to have the greatest overall appeal for most home or small office installations. The use of CTCSS tone encoded squelch helps to overcome some of the issues with FRS congestion in urban settings. It should be mentioned that although CTCSS is sometimes referred to as privacy codes this provides absolutely no privacy against eavesdropping on external FRS receivers, it is simply a way to reduce or eliminate unwanted radio interference from nearby transmissions. The units required frequency and tone set by small dip switches on the bottom, which might be too confusing for some users. It can easily be argued the dip switch method has some clear advantages. Later models suffered from "too many buttons" on the top and could easily be tuned off frequency by accident. As long as you had one competent person in the office or family to set the dip switches, you could be confident every intercom remained on the correct channel with the correct CTCSS tone setting. As long as you did not discuss private matters on the intercom system, these units really were some of the best wireless intercoms ever produced by anyone. Had Radio Shack made a unit that required use of the dip switches to set the frequency and tone, yet were on the 800Mhz frequency range, they would have had a best wireless intercom ever made.