What's the difference between a 900MHz cordless phone and a 2.4GHz or 5.8GHz?

Question

What's the difference between a 900MHz cordless phone and a 2.4GHz or 5.8GHz?

Answer 1

Basically just frequency. All of them have a similar range. Very low power (100mw.) I have never had any problems with 'interference' on the 2.4 Ghz. phones. WiFi, microwave, or other type. considering the fact that higher frequencies generally have less range, I find 900 Mhz. worked the best for that, but not by much. All the 'hype' on 5.8 Ghz. phones is a joke. Reading the fine print, most ALL 5.8 Ghz. cordless phones use 2.4 Ghz. for the base.!!!

Answer 2

900 MHz has the LEAST range, and least security, (security is enhanced only with DSS) The reason they get the least range is because they transmit much less power output then "newer" cordless phones..

DSS and FHSS is technology used to reduce interference, and improve on security, it is not marketing hype and has no effect on range, and is not marketed to improve range.

DECT phones operate at 1.9GHz, and provide the best range, and battery life as the lower the frequency, the further the range. They are also secure, and call quality is very clear.

2.4 MHz provides the next best range/battery life , as most radio scanners to not cover this range security is good, but increased with the addition of FHSS. The fault in this radio spectrum is that it shares the frequency with wifi, and the two may interfere with each other.

5.8 MHz phones were made to improve on the 2.4MH phones short comings, however it was at the cost of range, and battery life. Of all cordless phones (aside from 900 MHz) if will provide the least range, and battery life.

Answer 3

The radio frequency they operate on. 2.4 Ghz can interfere with Wi-fi, and 800 Mhz is crowded with other forms of communication, like cell phones and radio transceivers.

Answer 4

Frequency. They are operating in different frequencies. Your 900mhz is receiving/transmitting in 900 mhz. Just like a single band cellphone is capable of receiving signal from a 900mhz GSM band transmitter/cellsite. Now if the service provider operates in Tri-band, that would be 900mhz, 1800mhz  and so on, your single band cellphone may receive a low signal or no signal at all. So as cordless phones. So use 5.8Mhz cordless phone because some and most routers and wi-fi's are operating in 900 and 2.4, and your 900 or 2.4 cordless phone may jam with those wireless routers.

Answer 5

A person with a scanner can listen in on 900MHz. Very difficult to do on a digital phone that has 2.4GHz or 5.8GHz.