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Since only one wireless device can transmit at once, wireless transmissions are doubled (router to the repeater and then repeater to the client versus just router to the client), and so: Wireless throughput is reduced by at least 50%. [1] Wireless interference (e.g., with other networks on the same channel) is at least doubled.
Complementary code keying (CCK) is a modulation scheme used with wireless networks (WLANs) that employ the IEEE 802.11b specification. In 1999, CCK was adopted to supplement the Barker code in wireless digital networks to achieve data rate higher than 2 Mbit/s at the expense of shorter distance. This is due to the shorter chipping sequence in ...
A PIN pad or PIN entry device is an electronic device used in a debit, credit or smart card-based transaction to accept and encrypt the cardholder's personal identification number (PIN). PIN pads are normally used with payment terminals , automated teller machines or integrated point of sale devices in which an electronic cash register is ...
Verifone, Inc. is an American multinational corporation headquartered in New York City, New York. Verifone provides technology for electronic payment transactions and value-added services at the point-of-sale.
An ATM encrypting PIN pad (EPP) with German markings. An encrypting PIN pad is an apparatus for encrypting an identifier such as a PIN entered on a keypad. These are used in automated teller machines to ensure that the unencrypted PIN is not stored or transmitted anywhere in the rest of the system and thus cannot be revealed accidentally or through manipulations of the system.
Some devices with dual-band wireless network connectivity do not allow the user to select the 2.4 GHz or 5 GHz band (or even a particular radio or SSID) when using Wi-Fi Protected Setup, unless the wireless access point has separate WPS button for each band or radio; however, a number of later wireless routers with multiple frequency bands and ...
The Open Payment Initiative, or O.P.I. for short, was launched to standardize the application interface between the electronic point of sale (EPOS) application and any cashless payments solution installed on the electronic funds transfer at point of sale (EFTPOS) payment terminal.
The Wittig reaction or Wittig olefination is a chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide called a Wittig reagent.Wittig reactions are most commonly used to convert aldehydes and ketones to alkenes.