The Advancements of Cordless Telephones
Before the mobile telephone but long after smoke signals, there were cordless telephone systems, a land line with a cord free handheld handset. Cordless telephone conversations are made over radio waves transmitted between the phone’s base and the cordless handset. Communications between these two parts can be very limited, with a complete loss of signals loss between different floors not an uncommon occurrence.
The base station itself is connected to a fixed phone line like standard telephones and draws power from a wall outlet. it’s this base station that continues to separate a cordless telephone from cell phones — which do not require any base stations — even in the face of the vast advances made in cordless phones. These days one may can even find some cell phone-like features in corldess phones.
While they have certainly come a long way, in the beginning when cordless telephones first appeared on the market the devices were unreliable and rather expensive. Not only was the operational range extremely limited and the audio quality deplorable, but there was practically no security or privacy because signals could be easily intercepted by other cordless telephones in the area thanks to the limited range of available channels. It took about 10 and a half years for cordless telephones to become familiar household items, thanks to the opening up of the frequency range to 9 hundred megahertz with the arrival of DSS technology.
These 2 technical inventions took care of eavesdropping fears and cordless telephones took off as favored products. Though cellular telephones are pervasive and here for good, many still keep landlines in their houses for a number of reasons, and cordless telephones remain a viable market, with new models introduced fairly frequently. When selecting a cordless telephone, the very first thing to bear in mind is security : these phones are basically radio transmitters and thus subject to eavesdropping, though nowadays requiring a reasonably high level of technical class to do so successfully. In this respect make sure to choose DSS technology, at the 2.4 gigahertz frequency at a minimum (any less impinges on security while any more cuts into battery power).
And thus we come to the only other major issue: battery power. Avoid nickel-cadium if at all possible ; they depend on a memory effect whereby such batteries must be fully drained before recharging. Aside from these two concerns, a cordless telephone’s other characteristics are simply matters of personal taste.