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A cellular repeater (also known as cell phone signal booster or cell phone signal amplifier) is a type of bi-directional amplifier used to improve cell phone reception. [citation needed] A cellular repeater system commonly consists of a donor antenna that receives and transmits signal from nearby cell towers, coaxial cables, a signal amplifier, and an indoor rebroadcast antenna.
In the U.S., the analog AMPS standard that used the cellular band (800 MHz) was replaced by a number of digital systems. Initially, systems based upon the AMPS mobile phone model were popular, including IS-95 (often known as " CDMA ", the air interface technology it uses) and IS-136 (often known as D-AMPS, Digital AMPS, or " TDMA ", the air ...
Raya is owned by Vodafone Egypt, Nileonline and Egynet are now owned by Etisalat, TEdata is owned and operated by the oldest telecom company in the region telecom Egypt and link.net is owned by Orascom telecom. On January 27, 2011, almost all internet connectivity to Egypt was shut off by the Egyptian government. [4]
Some electronics, e.g. amplifiers Good coverage indoors on 850/900 MHz. Repeaters possible. 35 km hard limit. Very low density Hard Yes GPRS Class A 2G: CDMA: IS-95 (CDMA one) Digital: 1995 Limited None None Unlimited cell size, low transmitter power permits large cells Very low density Soft No 3G: CDMA: IS-2000 (CDMA 2000) Digital: 2000 / 2002 ...
The first cellular network efforts began at Bell Labs and with research conducted at Motorola.In 1960, John F. Mitchell [7] [8] [9] became Motorola's chief engineer for its mobile-communication products, and oversaw the development and marketing of the first pager to use transistors.
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A Tower Mounted Amplifier (TMA), or Mast Head Amplifier (MHA), is a low-noise amplifier (LNA) mounted as close as practical to the antenna in mobile masts or base transceiver stations. A TMA reduces the base transceiver station noise figure (NF) and therefore improves its overall sensitivity ; in other words the mobile mast is able to receive ...
The National Telecommunications Regulatory Authority (Arabic: الجهاز القومي لتنظيم الإتصالات, Al-Gehaz Al-Qawmy l-Tanzeem Al-Etisalat), commonly known as NTRA, is the Egypt government-approved regulatory and competition authority that was established in accordance of the Egyptian telecommunication regulation law No. 10/ 2003 as the national Authority equipped to ...