The History of the Phone - In the 1870s, two inventors Elisha Gray and Alexander Graham Bell both independently designed devices that could transmit speech electrically (the telephone). Both men rushed their respective designs to the patent office within hours of each other, Alexander Graham Bell patented his telephone first. Elisha Gray and Alexander Graham Bell entered into a famous legal battle over the invention of the telephone, which Bell won.
The very first cordless home phones were introduced in the 1970s. In 1986, the Federal Communications Commission or FCC granted the frequency range of 47-49 MHz for cordless phones. Granting a greater frequency range allowed cordless phones to have less interference and need less power to run. In 1990, the FCC granted the frequency range of 900 MH
z for cordless phones. In 1994, digital cordless phones and in 1995, digital spread spectrum (DSS) were both respectively introduced. Both developments were intended to increase the security of cordless phones and decrease unwanted eavesdropping by enabling the phone conversation to be digitally spreadout. In 1998, the FCC granted the frequency range of 2.4 GHz for cordless phones and as of 2003 the upward range is now 5.8 gigahertz.
Cordless telephones are one of those minor miracles of modern life; with a cordless phone, you can talk on the phone while moving freely about your house or in your yard. Long before cell phones became so cheap that anyone could afford one, cordless phones gave everyone the freedom to walk and talk within the privacy of their own homes.
Cordless phones have many of the same features as standard home telephones, and there are many models available.
The very first cordless home phones were introduced in the 1970s. In 1986, the Federal Communications Commission or FCC granted the frequency range of 47-49 MHz for cordless phones. Granting a greater frequency range allowed cordless phones to have less interference and need less power to run. In 1990, the FCC granted the frequency range of 900 MH
z for cordless phones. In 1994, digital cordless phones and in 1995, digital spread spectrum (DSS) were both respectively introduced. Both developments were intended to increase the security of cordless phones and decrease unwanted eavesdropping by enabling the phone conversation to be digitally spreadout. In 1998, the FCC granted the frequency range of 2.4 GHz for cordless phones and as of 2003 the upward range is now 5.8 gigahertz.
Cordless telephones are one of those minor miracles of modern life; with a cordless phone, you can talk on the phone while moving freely about your house or in your yard. Long before cell phones became so cheap that anyone could afford one, cordless phones gave everyone the freedom to walk and talk within the privacy of their own homes.
Cordless phones have many of the same features as standard home telephones, and there are many models available.
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