Analog: Analog cordless phones are the most affordable and available option. You will experience adequate range and good voice quality. Drawbacks include poor security (anyone with a radio scanner will be able to listen in) and static when you move too far away from the base station.
Digital: Digital cordless phones provide a stronger, clearer signal and improved security. Digital transmission is less prone to interference from radio waves and has the ability to switch to alternate channels when it detects interference thus providing enhanced clarity over analog models.
Digital Spread Spectrum: Digital Spread Spectrum technology is an advanced form of data transmission. The primary difference between conventional analog or digital models and DSS is that spread spectrum continually changes channels during your conversation, only staying on channels for milliseconds at a time. This keeps others from "locking on" and eavesdropping.
A Digital Spread Spectrum (DSS) cordless phone provides the highest clarity, security and range. Since the voice transmission is first digitized and then distributed in pieces across several frequencies, it is almost impossible for others to eavesdrop on your conversations. Channel hopping increases clarity because it limits the effects of other environmental sources of interference. DSS also provides increased range, as these models are allowed to run at a higher power level, thus boosting the signal.
