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67-481: Sedanca may refer to: Coupe de Ville : A "Sedanca de Ville" — also known as "Coupe de Ville" or "Town Car" — is an automobile with an external or open-topped driver's position and an enclosed compartment for passengers. Bentley Continental SC 'Sedanca Coupé' , a limited edition version of the Bentley Continental T produced in 1999. Topics referred to by

134-514: A ringer or a visual indicator, to announce an incoming telephone call. Telephone calls are initiated most commonly with a keypad or dial, affixed to the telephone, to enter a telephone number , which is the address of the call recipient's telephone in the telecommunications system, but other methods existed in the early history of the telephone. The first telephones were directly connected to each other from one customer's office or residence to another customer's location. Being impractical beyond just

201-408: A speaking tube . In the U.S., a somewhat dated slang term refers to the telephone as "the horn," as in "I couldn't get him on the horn," or "I'll be off the horn in a moment." Early telephones were technically diverse. Some used a water microphone , some had a metal diaphragm that induced current in an electromagnet wound around a permanent magnet, and some were dynamic – their diaphragm vibrated

268-520: A Lincoln built with a town car body for his father's personal use. Seeking publicity and building on his work with Studebaker, Raymond Loewy had two Lincoln Continentals altered to coupés de ville in 1946 using a removable plexiglas cover over the chauffeur. Ford introduced a town car body to its Model A line in December 1928. Designed by LeBaron and designated the 140-A, the Model A town car

335-497: A coil of wire in the field of a permanent magnet or the coil vibrated the diaphragm. The sound-powered dynamic variants survived in small numbers through the 20th century in military and maritime applications, where its ability to create its own electrical power was crucial. Most, however, used the Edison/Berliner carbon transmitter , which was much louder than the other kinds, even though it required an induction coil which

402-422: A common battery exchange had a magneto hand-cranked generator to produce a high voltage alternating signal to ring the bells of other telephones on the line and to alert the operator. Some local farming communities that were not connected to the main networks set up barbed wire telephone lines that exploited the existing system of field fences to transmit the signal. In the 1890s a new smaller style of telephone

469-485: A few customers, these systems were quickly replaced by manually operated centrally located switchboards . These exchanges were soon connected together, eventually forming an automated, worldwide public switched telephone network . For greater mobility, various radio systems were developed in the mid-20th century for transmission between mobile stations on ships and in automobiles. Hand-held mobile phones were introduced for personal service starting in 1973. In later decades,

536-486: A home and a shop. Users who wanted the ability to speak to several different locations would need to obtain and set up three or four pairs of telephones. Western Union , already using telegraph exchanges, quickly extended the principle to its telephones in New York City and San Francisco , and Bell was not slow in appreciating the potential. Signalling began in an appropriately primitive manner. The user alerted

603-586: A new industry comprising many VoIP companies that offer services to consumers and businesses . The reported global VoIP market in October 2021 was $ 85.2 billion with a projection of $ 102.5 billion by 2026. IP telephony uses high-bandwidth Internet connections and specialized customer premises equipment to transmit telephone calls via the Internet, or any modern private data network. The customer equipment may be an analog telephone adapter (ATA) which translates

670-400: A numeric keypad for dialing, and a display for caller ID . In addition, answering machine function may be built in. The cordless handset contains a rechargeable battery , which the base station recharges when the handset rests in its cradle. Muilt-handset systems generally also have additional charging stands. A cordless telephone typically requires a constant electricity supply to power

737-421: A partition between the driver and the passengers. These partitions often had a small slide-back glass window, or were completely made of glass with a manual or electric winding system. The passengers could speak to the driver through a communications tube, or, from the 1920s, through an electrical device similar to a telephone . Some designs included a switch panel in the rear passenger compartment, which contained

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804-591: A satellite phone is that it can be used in such regions where local terrestrial communication infrastructures, such as landline and cellular networks, are not available. Satellite phones are popular on expeditions into remote locations, hunting, fishing, maritime sector, humanitarian missions, business trips, and mining in hard-to-reach areas, where there is no reliable cellular service. Satellite telephones rarely get disrupted by natural disasters on Earth or human actions such as war, so they have proven to be dependable communication tools in emergency situations, when

871-431: A separate enclosure, called the subscriber set. The dial switch in the base interrupted the line current by repeatedly but very briefly disconnecting the line one to ten times for each digit, and the hook switch (in the center of the circuit diagram) disconnected the line and the transmitter battery while the handset was on the cradle. In the 1930s, telephone sets were developed that combined the bell and induction coil with

938-611: A small edition with individual equipment ("semi-custom"). In France, Audineau et Cie., Mulbacher and Rothschild became known for such works. In the United Kingdom, the style was applied to numerous chassis by the various specialist coachwork builders, but it is most often associated via the 4-door Sedanca de Ville variant with Rolls-Royce motor cars, and the 2-door sporting Sedanca variant with Bentleys . Coachbuilders included Barker , Hooper , H. J. Mulliner and Park Ward . Due to its historic and luxurious connections,

1005-487: A speedometer and switches to impart the most common instructions to the driver via a lighted dashboard panel, such as "stop", "left", "right", or "home". In the United States, a coupé de ville with rear doors for the passenger area, no roof or sides for the driver's area, and a partition between the passengers and the driver was referred to as a "town car" or "town brougham". Town cars normally had side windows in

1072-514: A wired interface, such as USB or Lightning connectors. Smartphones, being able to run apps , have vastly expanded functionality compared to previous mobile phones. Having internet access and built in cameras, smartphones have made video calling readily accessible via IP connections. Smartphones also have access to a large number of web services and web apps, giving them functionality similar to traditional computers, although smartphones are often limited by their relatively small screen size and

1139-484: Is defined as a coupé de ville in the United States. French variant similar to the town car. French variant similar to the coupé chauffeur but with a longer passenger compartment capable of holding up to seven passengers, with up to three on jump seats usually facing forward. The style was referred to in the United States as a limousine town car and in Britain as a limousine de ville . The term Coupé Napoleon

1206-489: Is derived from the Greek : τῆλε , tēle , "far" and φωνή, phōnē , "voice", together meaning "distant voice". Credit for the invention of the electric telephone is frequently disputed. As with other influential inventions such as radio , television , the light bulb , and the computer , several inventors pioneered experimental work on voice transmission over a wire and improved on each other's ideas. New controversies over

1273-411: Is different from Wikidata All article disambiguation pages All disambiguation pages Coupe de Ville Some coupés de ville have the passengers separated from the driver in a fully enclosed compartment while others have a canopy for the passengers and no partition between the driver and the passengers (passengers enter the compartment via driver's area). The separate exposed area for

1340-428: Is limited, usually to within the same building or within a short distance from the base station. Base stations include a radio transceiver which enables full-duplex, outgoing and incoming signals and speech with the handsets. The base station often includes a microphone, audio amplifier , and a loudspeaker to enable hands-free speakerphone conversations, without needing to use a handset. The base station may also have

1407-559: Is used for the Sedanca Coupé. A coupé de ville is alternatively defined in North America as a drophead coupé with a three-position top which may be fully closed, fully open, or partially closed, leaving rear passengers covered. In the United Kingdom, a sedanca-style drophead coupé with three-position folding top (fully open, covering the rear passengers only, or fully closed) is called a " cabriolet victoria ". This variant

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1474-663: The Earth instead of terrestrial cell sites , as cellphones do. Therefore, they can work in most geographic locations on the Earth's surface, as long as open sky and the line-of-sight between the phone and the satellite is provided. Depending on the architecture of a particular system, coverage may include the entire Earth or only specific regions. Satellite phones provide similar functionality to terrestrial mobile telephones; voice calling , text messaging , and low-bandwidth Internet access are supported through most systems. The advantage of

1541-612: The Internet , giving rise to the field of Internet Protocol (IP) telephony, also known as voice over Internet Protocol (VoIP). VoIP has proven to be a disruptive technology that is rapidly replacing traditional telephone network infrastructure. By January 2005, up to 10% of telephone subscribers in Japan and South Korea had switched to this digital telephone service. A January 2005 Newsweek article suggested that Internet telephony may be "the next big thing." The technology has spawned

1608-402: The human voice , into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user. The term is derived from Ancient Greek : τῆλε , romanized :  tēle , lit.   'far' and φωνή ( phōnē , voice ), together meaning distant voice . In 1876, Alexander Graham Bell

1675-658: The 1990s, mobile phones have gained other features which are not directly related to their primary function as telephones. These include text messaging, calendars, alarm clocks, personal schedulers, cameras, music players, games and later, internet access and smartphone functionality. Nearly all mobile phones have the ability to send text messages to other users via the SMS (Short Message Service) protocol. The multimedia messaging service (MMS) protocol enables users to send and receive multimedia content, such as photos, audio files and video files. As their functionality has increased over

1742-427: The United Kingdom is unclear. According to once source, "sedanca de ville" refers to a town car variant, and "sedanca" refers to a sedanca coupé. According to another source, sedanca de ville is a redundant term and sedanca refers to a town car. In France, Germany and Italy, the term "coupé de ville" was used for both the town car and sedanca coupé variants. In the United States, the similar term "coupé de ville"

1809-519: The United States have continued to release models called coupe de ville , sedanca de ville and town car despite the cars having other body styles; for example the 1959 Lincoln Continental Town Car has a sedan body style. Telephone A telephone , colloquially referred to as a phone , is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound , typically and most efficiently

1876-493: The advent of smartphones, mobile phone manufacturers have also included consumer electronics companies, such as Apple , Samsung and Xiaomi . As of 2022, most mobile phones are smartphones, being a combination of a mobile phone and a personal computing device in the same unit. Most smartphones are primarily operated using a graphical user interface and a touch screen. Many phones have a secondary voice user interface, such as Siri on Apple iPhones , which can operate many of

1943-451: The analog cellular system evolved into digital networks with greater capability and lower cost. Convergence in communication services has provided a broad spectrum of capabilities in cell phones, including mobile computing, giving rise to the smartphone , the dominant type of telephone in the world today. Before the development of the electric telephone, the term telephone was applied to other inventions, and not all early researchers of

2010-401: The assistance of a telephone operator. What turned out to be the most popular and longest-lasting physical style of telephone was introduced in the early 20th century, including Bell's 202-type desk set. A carbon granule transmitter and electromagnetic receiver were united in a single molded plastic handle, which when not in use was secured in a cradle in the base unit. The circuit diagram of

2077-526: The base station and charger units by means of a DC transformer which plugs into a wall AC power outlet. A mobile phone or cellphone or hand phone is a handheld telephone which connects via radio transmissions to a cellular telephone network . The cellular network consists of a network of ground based transmitter/receiver stations with antennas – which are usually located on towers or on buildings – and infrastructure connecting to land-based telephone lines. Analog cellular networks first appeared in 1979, with

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2144-404: The bell, induction coil, battery and magneto were in a separate bell box or " ringer box ". In phones connected to common battery exchanges, the ringer box was installed under a desk, or other out-of-the-way place, since it did not need a battery or magneto. Cradle designs were also used at this time, having a handle with the receiver and transmitter attached, now called a handset , separate from

2211-409: The capacity, quality, and cost of the network. Integrated Services Digital Network (ISDN) was launched in the 1980's, providing businesses and consumers with access to digital telephony services such as data, voice, video , and fax services. The development of digital data communications methods made it possible to digitize voice and transmit it as real-time data across computer networks and

2278-470: The cradle base that housed the magneto crank and other parts. They were larger than the "candlestick" and more popular. Disadvantages of single-wire operation such as crosstalk and hum from nearby AC power wires had already led to the use of twisted pairs and, for long-distance telephones, four-wire circuits . Users at the beginning of the 20th century did not place long-distance calls from their own telephones but made an appointment and were connected with

2345-469: The desk set, obviating a separate ringer box. The rotary dial becoming commonplace in the 1930s in many areas enabled customer-dialed service, but some magneto systems remained even into the 1960s. After World War II, the telephone networks saw rapid expansion and more efficient telephone sets, such as the model 500 telephone in the United States, were developed that permitted larger local networks centered around central offices. A breakthrough new technology

2412-420: The device's functions, as well as enabling users to use spoken commands to interact with the internet. Typically alphanumeric text input is accomplished via an on-screen virtual keyboard, although some smartphones have a small physical keyboard. Smartphones offer the ability to access internet data through the cellular network and via wi-fi, and usually allow direct connectivity to other devices via Bluetooth or

2479-489: The doors only. The name "town car" is an Anglicized version of "de Ville". The terms sedanca and sedanca de ville were introduced by Spanish nobleman Count Carlos de Salamanca, the Spanish distributor for Rolls-Royce, in 1923. The strict definition of a sedanca includes a locker for the cant rails and canopy that form the roof; this was introduced by Count de Salamanca in his original sedanca. Usage of these terms in

2546-476: The driver followed from horse-drawn carriages . The term "coupé de ville" came into existence in the 19th century before the invention of the automobile. The initial usage of the term was for a variant of the coupé carriage that is very similar to the British clarence carriage . The term "de ville" is French for "for town" and indicates that the vehicle is for use in town or for short distances. When added to

2613-401: The driver from dirt from the unpaved roads and dung from draught animals. Later models also included doors to the driving compartment. Early roofs for the driver's area were made of a single skin of leather without any structural support, and were held in place between the passenger compartment and the windshield by poppers to allow for easy removal or rollback when the weather allowed. From

2680-402: The earliest Strowger switch automatic exchanges had seven wires, one for the knife switch , one for each telegraph key , one for the bell, one for the push-button and two for speaking. Large wall telephones in the early 20th century usually incorporated the bell, and separate bell boxes for desk phones dwindled away in the middle of the century. Rural and other telephones that were not on

2747-457: The electrical device used the term. Perhaps the earliest use of the word for a communications system was the telephon created by Gottfried Huth in 1796. Huth proposed an alternative to the optical telegraph of Claude Chappe in which the operators in the signaling towers would shout to each other by means of what he called "speaking tubes", but would now be called giant megaphones . A communication device for sailing vessels, called telephone ,

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2814-463: The end of a body style (saloon, coupé, landaulet, etc.), "de Ville" indicated that the top over the driver's compartment could be folded away, retracted, or otherwise removed. As a vehicle for town use, the coupé de ville usually had no facilities for carrying luggage. Early cars had the driver fully exposed to the weather with no cover, no doors, and sometimes no windshield,. As speed and distances travelled increased, windshields were added to protect

2881-524: The first digital cellular networks appearing in the early 1990s. Mobile phones require a SIM card to be inserted into the phone. The SIM card is a small PVC card containing a small integrated circuit which stores the user's international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers to the cellular network. Mobile phones generally incorporate an LCD or OLED display, with some types, such as smartphones, having touch screens. Since

2948-531: The issue still arise from time to time. Charles Bourseul , Antonio Meucci , Johann Philipp Reis , Alexander Graham Bell , and Elisha Gray , amongst others, have all been credited with the invention of the telephone. Alexander Graham Bell was the first to be awarded a patent for the electric telephone by the United States Patent and Trademark Office (USPTO) in March 1876. Before Bell's patent,

3015-436: The late 1920s onward designs used a metal two-skin roof which retracted into a void above the passenger compartment, either manually or electrically. Due to its use as a chauffeured vehicle, the passenger compartment was normally luxurious, clad in the best materials, with seating for between two and most often up to six or occasionally eight persons, made of the finest cotton or silk adorned with brocade . The same material

3082-412: The model 202 shows the direct connection of the transmitter to the line, while the receiver was inductively coupled. In local battery configurations, when the local loop was too long to provide sufficient current from the exchange, the transmitter was powered by a local battery and inductively coupled, while the receiver was included in the local loop. The coupling transformer and the ringer were mounted in

3149-471: The other end, or the exchange operator , by whistling into the transmitter. Exchange operation soon resulted in telephones being equipped with a bell in a ringer box , first operated over a second wire, and later over the same wire, but with a condenser ( capacitor ) in series with the bell coil to allow the AC ringer signal through while still blocking DC (keeping the phone " on hook "). Telephones connected to

3216-411: The same term [REDACTED] This disambiguation page lists articles associated with the title Sedanca . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Sedanca&oldid=1090908561 " Category : Disambiguation pages Hidden categories: Short description

3283-426: The service location to the emergency services when an emergency telephone number is called. A cordless telephone or portable telephone consists of a base station unit and one or more portable cordless handsets . The base station connects to a telephone line, or provides service by voice over IP (VOIP). The handset communicates with the base station via radio frequency signals. A handset's operational range

3350-453: The signals of a conventional analog telephone; an IP Phone , a dedicated standalone device; or a computer softphone application, utilizing the microphone and headset devices of a personal computer or smartphone. While traditional analog telephones are typically powered from the central office through the telephone line, digital telephones require a local power supply. Internet-based digital service also requires special provisions to provide

3417-510: The size of their keyboards. Typically, smartphones feature such tools as cameras, media players, web browsers, email clients, interactive maps, satellite navigation and a variety of sensors, such as a compass , accelerometers and GPS receivers . In addition to voice calls, smartphone users commonly communicate using a wide variety of messaging formats, including SMS, MMS, email, and various proprietary messaging services, such as iMessage and various social media platforms. In 2002, only 10% of

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3484-458: The telephone transmitted sound in a way that was similar to the telegraph. This method used vibrations and circuits to send electrical pulses, but was missing key features. Bell found that this method produced a sound through intermittent currents, but in order for the telephone to work a fluctuating current reproduced sounds the best. The fluctuating currents became the basis for the working telephone, creating Bell's patent. That first patent by Bell

3551-464: The term town car found early favour amongst many North America automobile manufacturers. The most luxurious were handbuilt by coachbuilders on rolling chassis provided by prestige automakers, such as Packards and North American-built Rolls-Royces bodied by Brewster & Co. , and various Cadillacs, Lincolns, Packards, and others by LeBaron and Rollston . Brewster also sold a limited line of automobiles under its own name. In 1922, Edsel Ford had

3618-438: The user alternately listening and speaking (or rather, shouting) into the same hole. Sometimes the instruments were operated in pairs at each end, making conversation more convenient but also more expensive. At first, the benefits of a telephone exchange were not exploited. Instead, telephones were leased in pairs to a subscriber , who had to arrange for a telegraph contractor to construct a line between them, for example, between

3685-522: The voice at a distant location. The receiver and transmitter are usually built into a handset which is held up to the ear and mouth during conversation. The transmitter converts the sound waves to electrical signals which are sent through the telecommunications system to the receiving telephone, which converts the signals into audible sound in the receiver or sometimes a loudspeaker . Telephones permit transmission in both directions simultaneously. Most telephones also contain an alerting feature, such as

3752-456: The world's population used mobile phones and by 2005 that percentage had risen to 46%. By the end of 2009, there were a total of nearly 6 billion mobile and fixed-line telephone subscribers worldwide. This included 1.26 billion fixed-line subscribers and 4.6 billion mobile subscribers. A satellite telephone, or satphone, is a type of mobile phone that connects to other phones or the telephone network by radio link through satellites orbiting

3819-517: The years, many types of mobile phone, notably smartphones, require an operating system to run. Popular mobile phone operating systems in the past have included Symbian , Palm OS , BlackBerry OS and mobile phone versions of Windows . As of 2022, the most used operating systems are Google's Android and Apple's iOS . Before the era of smartphones, mobile phones were generally manufactured by companies specializing in telecommunications equipment, such as Nokia , Motorola , and Ericsson . Since

3886-431: Was also most often used to provide complete curtain coverage for the compartment, and was matched by substantial carpet and fine inlaid woodwork. The driver's compartment had leather seats to endure bad weather. The division between the two compartments often held jump seats for lighter passengers such as children, and it would often accommodate various compartments for drinks, cigars, make-up, or books. Some versions had

3953-571: Was also used to describe a Bugatti Royale body of the type. The term is derived from the brougham carriage . In strict terms, a brougham would have a sharply squared rear end of the roof and a forward-curving body line at the base of the front of the passenger enclosure. The term degraded during the twentieth century. Due to its high-end luxurious form, bespoke commissioning and resultant design nature, and final high cost, coupés de ville of both types were hand-built in small numbers. The cars were almost always made as individual ("Full Custom"), or in

4020-461: Was an impedance matching transformer to make it compatible with the impedance of the line. The Edison patents kept the Bell monopoly viable into the 20th century, by which time the network was more important than the instrument. Early telephones were locally powered, using either a dynamic transmitter or by the powering of a transmitter with a local battery. One of the jobs of outside plant personnel

4087-436: Was introduced, packaged in three parts. The transmitter stood on a stand, known as a " candlestick " for its shape. When not in use, the receiver hung on a hook with a switch in it, known as a "switchhook". Previous telephones required the user to operate a separate switch to connect either the voice or the bell. With the new kind, the user was less likely to leave the phone "off the hook". In phones connected to magneto exchanges,

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4154-539: Was invented by Captain John Taylor in 1844. This instrument used four air horns to communicate with vessels in foggy weather. Johann Philipp Reis used the term in reference to his invention, commonly known as the Reis telephone , in c. 1860. His device appears to be the first device based on the conversion of sound into electrical impulses. The term telephone was adopted into the vocabulary of many languages. It

4221-716: Was sold until early 1930. 1,065 Model A town cars were built by the end of production in 1930. In 1940 and 1941, a limited edition model of the Cadillac Sixty Special carried the Town Car name. It was reintroduced as a coupe hardtop in 1949 using the French name for the body style Coupe DeVille and in 1956 as a four-door hardtop called the Sedan DeVille . Production of cars with the coupe de ville body style ceased in 1939. However, car manufacturers in

4288-435: Was the master patent of the telephone, from which other patents for electric telephone devices and features flowed. In 1876, shortly after Bell's patent application, Hungarian engineer Tivadar Puskás proposed the telephone switch, which allowed for the formation of telephone exchanges , and eventually networks. In the United Kingdom, the blower is used as a slang term for a telephone. The term came from navy slang for

4355-426: Was the first to be granted a United States patent for a device that produced clearly intelligible replication of the human voice at a second device. This instrument was further developed by many others, and became rapidly indispensable in business , government , and in households . The essential elements of a telephone are a microphone ( transmitter ) to speak into and an earphone ( receiver ) which reproduces

4422-591: Was the introduction of Touch-Tone signaling using push-button telephones by American Telephone & Telegraph Company (AT&T) in 1963. The invention of the transistor in 1947 dramatically changed the technology used in telephone systems and in the long-distance transmission networks, over the next several decades. With the development of stored program control and MOS integrated circuits for electronic switching systems , and new transmission technologies such as pulse-code modulation (PCM), telephony gradually evolved towards digital telephony , which improved

4489-423: Was to visit each telephone periodically to inspect the battery. During the 20th century, telephones powered from the telephone exchange over the same wires that carried the voice signals became common. Early telephones used a single wire for the subscriber's line, with ground return used to complete the circuit (as used in telegraphs ). The earliest dynamic telephones also had only one port opening for sound, with

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