In the earliest days, telephones used are those with a coiled wire between the base unit and the handset. Talking on this phone will require you to stay close to it to prevent one component from detaching to the base unit. But with the advent of cordless phones, you get the privilege of talking over the phone while moving freely around the house or even outside or at the backyard. This is one advantage to those who wanted the conversation within his/her privacy.

Cordless phones are basically the same with the one with coiled wire except for one thing: they should be recharged periodically by replacing the handset back to the base unit. Likewise, its base unit should be physically attached to the electrical outlet and to a telephone line as well. One disadvantage, on the other hand, is during power outage the device could render useless unless there is another device that is battery-powered to restore its service, albeit at a short period of time only.

Although it was around 1970