They can be purchased as part of a telephone or as a separate machine. Speakerphone Speakerphones give you the ability to free up your hands for other things as you carry on a conversation, or wait on hold. They also make it possible for everyone in the room to share in the telephone conversation. It is three machines in one, taking up the space of only one. A Cordless phone can offer you the same options as above, but there is more then options to consider when purchasing a cordless telephone.
Cordless telephones transmit on frequency bands.
Some of the older and less expensive telephones transmit on 43 to 49 MHz frequency. Now you can get cordless phones that transmit in the 900 MHz and 2.4 GHz frequencies, because the U.S. Govenment has freed up these higher frequency bands that once were reserved for military use only. The 900 MHz is the most popular high frequency band. The signals transmitted on these higher bands are more energetic resulting in better sound quality and greater range. The 2.4GHz offers even more energetic signals and is less subject to interference.