http://www.allinterview.com Top WiFi Related Interview Questions en-us http://www.allinterview.com/showanswers/24008.html globle mobile service. http://www.allinterview.com/showanswers/28847.html GPRS is 2.5 generation of GSM. Radio interface is same as GSM. so i think it also uses the same frequency band and moulation. i.e 900/1800Mhz,GMSK modulation. http://www.allinterview.com/showanswers/15184.html it works on the ISM frequency 2.4 Ghz http://www.allinterview.com/showanswers/1076.html It is a wireless technology by which v can communicate other devices(such as printers, scanners, systems) without connecting them. http://www.allinterview.com/showanswers/8560.html ITU ? International Telecommunication Union UMTS ? Universal Mobile Telecommunication Service PCS ? Personal Communications Services GSM ? Global System for Mobile Communication ISDN ? Integrated Services Digital Network PSTN - Public Switched T http://www.allinterview.com/showanswers/16351.html FCC is federal communication comitee of USA. it is regulatory authority of USA like TRAI(actually DOT) in india. Its role is to allocate frequencies from RF spectrum (1 HZ- 300 GHZ) and providing licences for different application like TV, m http://www.allinterview.com/showanswers/13204.html Ultra Wideband or UWB is a technique based on transmitting very-short-duration pulses, often of duration of only nanoseconds or less, whereby the occupied bandwidth goes to very large values. This allows it to deliver data rates in excess of http://www.allinterview.com/showanswers/15174.html NO. they use omnidirectional antennaes http://www.allinterview.com/showanswers/13203.html Lots of difference are there,... most important&explicit are spellings. http://www.allinterview.com/showanswers/15182.html bluetooth dongle is a hardware device. comprising of bluetooth microchip mounted on USB male port. we can connect it to a PC or laptop and transfer data in wireless mode to any other bluetooth device in its periphre. http://www.allinterview.com/showanswers/15178.html FHSS - frequency hopping spread spectrum frequency hopping is a spread spectrum technique in which the transmitter transmits at varying frequencies for very small periods of time say milli or nano sec. these frequencies are choosen in ran http://www.allinterview.com/showanswers/15187.html frequency hopping is a spread spectrum technique in which the transmitter transmits at varying frequencies for very small periods of time say milli or nano sec. these frequencies are choosen in random among the frequency band available. the r http://www.allinterview.com/showanswers/15181.html IEEE 802.15.1 standard, developed by SIG ( special interest group) ericsson, nokia, intel, alcatel. ericsson was the major contributor in the development. named after king of denmark harrald bluetooth for his noble achievements. developed for http://www.allinterview.com/showanswers/15180.html ericcson http://www.allinterview.com/showanswers/15185.html 2402 MHZ- 2470 MHZ in europe and USA