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RS232 or Serial Communication Port is a connectivity port between electronic devices such as a computer & a modem. However it is not used now a days.
http://answers.ask.com/Computers/Hardware/what_is_...
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RS232 stands for "recommended standard 232", a traditional method for transferring information between a computer and its peripherals. Instead of using wireless technology
http://www.ehow.com/about_5084766_rs-cable.html
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Early RS-232 transceivers suffered from signal loss through poorly insulated connection cables. The RS-232 standard allows a signal level that can range from +5 volts to -5 volts,
http://www.ehow.com/facts_6822483_rs_232-transceiv...
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An RS-232 port was once a standard feature of a personal computer for connections to modems, printers, mice, data storage, un-interruptible power supplies, and other peripheral devices
http://wiki.answers.com/Q/What_is_rs-_232
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