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NITEL
Nigerian Telecommunications Limited (NITEL), was a monopoly telephone service provider in Nigeria until 1992 when the Nigerian government enacted the Nigerian Communications Commission act allowing new entrants into the telecommunications sector. During and after its years of monopoly, the performance of the firm was sub-par, a behavior similar to other state owned enterprises such as NEPA and government-owned water corporations. The firm was formed in 1985 as the welding together of two government entities, the telecoms arm of the Post and Telecommunications (P&T) department under the Ministry of Communications and the Nigerian External Communications (NET). A February 2008 report by the BBC revealed that the Nigerian government assumed the transnational corporation did not improve performance of NITEL and therefore stopped privatization in favour of Transcorp. In 2015, the government eventually finalized a transaction that saw NITEL and Mtel's assets handed over to NATCOM. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
City
A city is a human settlement of a substantial size. The term "city" has different meanings around the world and in some places the settlement can be very small. Even where the term is limited to larger settlements, there is no universally agreed definition of the lower boundary for their size. In a narrower sense, a city can be defined as a permanent and Urban density, densely populated place with administratively defined boundaries whose members work primarily on non-agricultural tasks. Cities generally have extensive systems for housing, transportation, sanitation, Public utilities, utilities, land use, Manufacturing, production of goods, and communication. Their density facilitates interaction between people, government organisations, government organizations, and businesses, sometimes benefiting different parties in the process, such as improving the efficiency of goods and service distribution. Historically, city dwellers have been a small proportion of humanity overall, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microwave Transmission
Microwave transmission is the transmission of information by electromagnetic waves with wavelengths in the microwave frequency range of 300 MHz to 300 GHz (1 m - 1 mm wavelength) of the electromagnetic spectrum. Microwave signals are normally limited to the line of sight, so long-distance transmission using these signals requires a series of repeaters forming a microwave relay network. It is possible to use microwave signals in over-the-horizon communications using tropospheric scatter, but such systems are expensive and generally used only in specialist roles. Although an experimental microwave telecommunication link across the English Channel was demonstrated in 1931, the development of radar in World War II provided the technology for practical exploitation of microwave communication. During the war, the British Army introduced the Wireless Set No. 10, which used microwave relays to multiplex eight telephone channels over long distances. A link across the E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Network Congestion
Network congestion in data networking and queueing theory is the reduced quality of service that occurs when a network node or link is carrying more data than it can handle. Typical effects include queueing delay, packet loss or the blocking of new connections. A consequence of congestion is that an incremental increase in offered load leads either only to a small increase or even a decrease in network throughput. Network protocols that use aggressive retransmissions to compensate for packet loss due to congestion can increase congestion, even after the initial load has been reduced to a level that would not normally have induced network congestion. Such networks exhibit two stable states under the same level of load. The stable state with low throughput is known as congestive collapse. Networks use congestion control and congestion avoidance techniques to try to avoid collapse. These include: exponential backoff in protocols such as CSMA/CA in 802.11 and the similar CSMA/C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Telephony
Mobile telephony is the provision of wireless telephone services to mobile phones, distinguishing it from fixed-location telephony provided via landline phones. Traditionally, telephony specifically refers to voice communication, though the distinction has become less clear with the integration of additional features such as text messaging and data services. Modern mobile phones connect to a terrestrial cellular network of base stations (commonly referred to as cell sites), using radio waves to facilitate communication. Satellite phones use wireless links to orbiting satellites, providing an alternative in areas lacking local terrestrial communication infrastructure, such as landline and cellular networks. Cellular networks, satellite networks, and landline systems are all linked to the public switched telephone network (PSTN), enabling calls to be made to and from nearly any telephone worldwide. As of 2010, global estimates indicated approximately five billion mobile ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog Signal
An analog signal (American English) or analogue signal (British and Commonwealth English) is any continuous-time signal representing some other quantity, i.e., ''analogous'' to another quantity. For example, in an analog audio signal, the instantaneous signal voltage varies continuously with the pressure of the sound waves. In contrast, a digital signal represents the original time-varying quantity as a sampled sequence of quantized values. Digital sampling imposes some bandwidth and dynamic range constraints on the representation and adds quantization noise. The term ''analog signal'' usually refers to electrical signals; however, mechanical, pneumatic, hydraulic, and other systems may also convey or be considered analog signals. Representation An analog signal uses some property of the medium to convey the signal's information. For example, an aneroid barometer uses rotary position as the signal to convey pressure information. In an electrical signal, the voltage, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FESTAC 77
Festac '77, also known as the Second World Black and African Festival of Arts and Culture (the first festival took place in Dakar, 1966, the second in Algiers in July 1969) was a major international festival held in Lagos, Nigeria, from 15 January 1977 to 12 February 1977. The month-long event celebrated African culture and showcased African music, fine art, literature, drama, dance and religion to the world. Around 16,000 participants, representing 56 African nations and countries of the African Diaspora, performed at the event. Music artists who performed at the festival included Stevie Wonder from the United States, Gilberto Gil from Brazil, Bembeya Jazz National from Guinea, Mighty Sparrow from Trinidad and Tobago, Les Ballets Africains, South African singer Miriam Makeba, Congolese Franco Luambo Makiadi, and Liberian singer Yatta Zoe. At the time it was held, it was the largest pan-African gathering to ever take place. The event attracted around 500,000 spectators. The offi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Direct Dialing
International direct dialing (IDD) or international subscriber dialling (ISD) is placing an international telephone call, dialed directly by a telephone subscriber, rather than by a telephone operator. Subscriber dialing of international calls typically requires an international call prefix (international dial-out code, international direct dial code, IDD code) to be dialed before the country code. The term ''international subscriber dialling'' was used in the United Kingdom and Australia until the terminology was changed to ''international direct dialling''. Since the late 20th century, most international calls are dialed directly. Calls are initiated by dialing the international call prefix for the originating country, followed by the country calling code for the destination country, and finally the national telephone number of the destination. For example, a landline subscriber in the UK wishing to call Australia would first dial the following sequence: ''00'' (the call prefi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telex
Telex is a telecommunication Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electronic means, typically through cables, radio waves, or other communication technologies. These means of ... system that allows text-based messages to be sent and received by teleprinter over telephone lines. The term "telex" may refer to the service, the network, the devices, or a message sent using these. Telex emerged in the 1930s and became a major method of sending text messages electronically between businesses in the post–World War II period. Its usage declined as the fax machine grew in popularity in the 1980s. Technology The technology operates on switched station-to-station basis with teleprinter devices at the receiving and sending locations. It operates over the circuits of the public switched telephone network or by private lines. Point-to-point teleprinter systems had been in use long before ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Harcourt
Port Harcourt (Pidgin: ''Po-ta-kot or Pi-ta-kwa)'' is the capital and largest city of Rivers State in Nigeria. It is the fifth most populous city in Nigeria after Lagos, Kano, Ibadan and Benin. It lies along the Bonny River and is located in the oil rich Niger Delta region. As of 2023, Port Harcourt's urban population is approximately 3,480,000. The population of the metropolitan area of Port Harcourt is almost twice its urban area population with a 2015 United Nations estimate of 2,344,000. In 1950, the population of Port Harcourt was 59,752. Port Harcourt has grown by 150,844 since 2015, which represents a 4.99% annual change. The colonial administration of Nigeria created the port to export coal from the collieries of Enugu located north of Port Harcourt, to which it was linked by a railway called the Eastern Line, also built by the British. Port Harcourt's economy turned to petroleum when the first shipment of Nigerian crude oil was exported through the city in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaduna (city)
Kaduna is the capital city of Kaduna State, and the former political capital of Northern Region, Nigeria, Northern Nigeria. It is located in north-western Nigeria, on the Kaduna River. It is a trade center and a major transportation hub as the gateway to northern states of Nigeria, with its rail and important road network. The population of Kaduna was put at 760,084 as of the 2006 Nigerian census. Rapid urbanization since 2005 has created an increasingly large population, and as of 2024, the city has an estimated population of 1.2 million people. Etymology The word ''Kaduna'' is said to be a corruption of the Hausa word for "crocodiles", ''Kaddunna'' in the Hausa language (''kaduna'' being the plural form). Another version of the etymology of the name proposes a link to the Gbagyi language, Gbagyi word/name 'Odna', meaning 'river'. History Kaduna was founded by British Empire, British colonists in 1900. The first British governor of Northern Nigeria, Sir Frederick Lugard, 1st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enugu (city)
Enugu ( ; ) is the capital city of Enugu State in Nigeria. The city had a population of 4,690,100 spread across the three Local government areas of Nigeria, LGAs of Enugu East, Enugu North and Enugu South, according to the 2022 Nigerian census. History Early history Énugwú (Igbo verbalization of Enugu) is the capital city of Enugu State in Nigeria. It is located in southeastern part of Nigeria. The name Enugu is derived from the two Igbo words Énú Ụ́gwụ́, meaning "hill top", denoting the city's hilly geography. Enugu acquired township status in 1917 and was called Enugwu-Ngwo, but because of the rapid expansion towards areas owned by other indigenous communities, the city was renamed Enugu in 1928. The first settlement in the Enugu area was the small Nike village of Ogui from present day Igala which was present since the era of the Atlantic Slave Trade.Udo, p. 88. ''Nike'' in the Igbo language means "with strength or power".Williams, p. 196. The Nike people acquir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ibadan
Ibadan (, ; ) is the Capital city, capital and most populous city of Oyo State, in Nigeria. It is the List of Nigerian cities by population, third-largest city by population in Nigeria after Lagos and Kano (city), Kano, with a total population of 3,649,000 as of 2021, and nearly 4 million within its Metropolitan area, metropolitan area. At 3,080 square kilometres it is the country's largest city by land area. At the time of Nigeria's independence in 1960, Ibadan was the largest and most populous city in the country, and the second-most populous in Africa behind Cairo. Ibadan is ranked one of the fastest-growing cities in sub-Saharan Africa, according to the UN Human Settlements Program (2022). It is also ranked third in West Africa in the tech startups index. Ibadan joined the UNESCO Global Network of Learning Cities in 2016. Ibadan is located in south-western Nigeria, inland northeast of Lagos and southwest of Abuja, the federal capital. It is a prominent Public transport ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
