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Telex is a telecommunication service that provides text-based message exchange over the circuits of the public switched telephone network or by private lines. The technology operates on switched station-to-station basis with teleprinter devices at the receiving and sending locations.[1] Telex was a major method of sending text messages electronically between businesses in the post–World War II period. Its usage went into decline as the fax machine grew in popularity in the 1980s.
The term "telex" may refer to the service, the network, the devices, or the actual message.[2] Point-to-point teleprinter systems had been in use long before telex exchanges were built in the 1930s. Teleprinters evolved from telegraph systems, and, like the telegraph, use binary signals, with mark and space logic represented by the presence or absence of a certain level of electric current. This differs from the analog telephone system, which used varying voltage to represent sound. For this reason, telex exchanges were entirely separate from the telephone system, with their own signalling standards, exchanges and system of telex numbers (the counterpart of telephone numbers).
Telex provided the first common medium for international record communications using standard signalling techniques and operating criteria as specified by the International Telecommunication Union. Customers on any telex exchange could deliver messages to any other, around the world. To reduce connecting line usage, telex messages were encoded onto paper tape and then read into the line as quickly as possible. The system normally delivered information at 50 baud or approximately 66 words per minute, encoded using the International Telegraph Alphabet No. 2. In the last days of the traditional telex networks, end-user equipment was often replaced by modems and phone lines, reducing the telex network to what was effectively a directory service running on the telephone network.
Development
A late-model British Telecom "Puma" telex machine of the 1980s
Telex began in Germany as a research and development program in 1926 that became an operational teleprinter service in 1933. The service, operated by the German Reichspost[3] had a speed of 50 baud, which is approximately 66 words per minute.
Soon after telex services were developed by other nations. Telex spread within Europe and after 1945 around the world.[4]
By 1978 West Germany, including West Berlin, had 123,298 telex connections. Long before automatic telephony became available, most countries, even in central Africa and Asia, had at least a few high-frequency shortwave telex links. Often, government postal and telegraph services (PTTs) initiated these radio links. The most common radio standard, CCITT R.44 had error-corrected retransmitting time-division multiplexing of radio channels. Most impoverished PTTs operated their telex-on-radio (TOR) channels non-stop, to get the maximum value from them.
The cost of TOR equipment has continued to fall. Although the system initially required specialised equipment, as of 2016[update] many amateur radio operators operate TOR, also known as radioteletype (RTTY), with special software and inexpensive hardware to connect computer sound cards to short-wave radios.[5]
Modern cablegrams or telegrams actually operate over dedicated telex networks, using TOR whenever required.[citation needed]
Telex served as the forerunner of modern fax, email, and text messaging – both technically and stylistically. Abbreviated English (like "CU L8R" for "see you later") as used in texting originated with telex operators exchanging informal messages in real time[citation needed] – they became the first "texters" long before the introduction of mobile phones[citation needed]. Telex users could send the same message to several places around the world at the same time, like email today, using the Western Union InfoMaster Computer. This involved transmitting the message via paper tape to the InfoMaster Computer (dial code 6111) and specifying the destination addresses for the single text. In this way, a single message could be sent to multiple distant telex and TWX machines as well as delivering the same message to non-telex and non-TWX subscribers via Western Union Mailgram.
Operation and applications
Telex messages are routed by addressing them to a telex address, e.g., "14910 ERIC S", where 14910 is the subscriber number, ERIC is an abbreviation for the subscriber's name (in this case Telefonaktiebolaget L.M. Ericsson in Sweden) and S is the country code or location code. Solutions also exist for the automatic routing of messages to different telex terminals within a subscriber organization, by using different terminal identities, e.g., "+T148". The country codes (formally, network identification codes) for the first countries to adopt telex are single letters, while other countries have two-letter codes.[6][7] Some specialty services and American cities have three-letter network or location codes (such as MAS for Inmarsat or LSA for Los Angeles), and a few towns have four-letter codes (such as ROVE for Rockville, Maryland).[8]
A major advantage of telex is that the receipt of the message by the recipient could be confirmed with a high degree of certainty by the "answerback", which is a transmission-control enquiry character. At the beginning of the message, the sender would transmit a WRU (Who are you?) code, and the recipient machine would automatically initiate a response which was usually encoded in a rotating drum with pegs, much like a music box. The position of the pegs sent an unambiguous identifying code to the sender, so the sender could verify connection to the correct recipient. The WRU code would also be sent at the end of the message, so a correct response would confirm that the connection had remained unbroken during the message transmission. This gave telex a major advantage over group 2 fax, which had no inherent error-checking capability.
The usual method of operation was that the message would be prepared off-line, using paper tape. All common telex machines incorporated a five-hole paper-tape punch and reader. Once the paper tape had been prepared, the message could be transmitted in minimum time. Telex billing was always by connected duration, so minimizing the connected time saved money. However, it was also possible to connect in "real-time", where the sender and the recipient could both type on the keyboard and these characters would be immediately printed on the distant machine.
Telex could also be used as a rudimentary but functional carrier of information from one IT system to another, in effect a primitive forerunner of electronic data interchange. The sending IT system would create an output (e.g., an inventory list) on paper tape using a mutually agreed format. The tape would be sent by telex and collected on a corresponding paper tape by the receiver and this tape could then be read into the receiving IT system.
One use of telex circuits, in use until the widescale adoption of X.400 and Internet email, was to facilitate a message handling system, allowing local email systems to exchange messages with other email and telex systems via a central routing operation, or switch. One of the largest such switches was operated by Royal Dutch Shell as recently as 1994, permitting the exchange of messages between a number of IBM Officevision, Digital Equipment CorporationALL-IN-1 and Microsoft Mail systems. In addition to permitting email to be sent to telex, formal coding conventions adopted in the composition of telex messages enabled automatic routing of telexes to email recipients.
United States
Teletypewriter Exchange Service
The Teletypewriter Exchange Service (TWX) was developed by the American Telephone and Telegraph Company (AT&T) in the United States, commencing service on November 21, 1931.[9]
From 1942 to 1952, AT&T published progress with the system in the trade magazine TWX. It published articles that touched upon many aspects of the technology.
From inception to 1962, access to the service was provided by operator-assisted, manual switching. By 1962, the network had grown to one hundred switchboard locations to handle the traffic, causing considerable delay in the speed of connections of up to 21⁄2 minutes on average.[9] On August 31, 1962, the service was integrated into the Direct Distance Dialing (DDD) network, which improved connection times to about thirty seconds.[9] For the new dial technology, each station was assigned a ten-digit telephone number from a reserved set of N10 area codes, designated as Service Access Codes (SAC). Area code 510 was assigned for the United States and Area Code 610 in Canada. Sixteen operating centers were established across the United States.
Later in the decade, the United States was subdivided into three service regions. and assigned codes from the remaining set of SACs (710, 810, and 910). SAC 710 covered the Northeast of the United States (New England, New York, New Jersey, Pennsylvania, Maryland, the District of Columbia, Virginia, and West Virginia). 810 was assigned from Michigan southward and east of the Mississippi River to Ohio, Indiana, and Kentucky, and the entire South and 910 served west of the Mississippi to the Southwest and West Coast.[10]
TWX lines were configured with a special Class of Service to prevent interconnections with voice services.
Western Union purchased the TWX system from AT&T in January 1969.[11] The TWX system and the use of the special US area codes continued until 1981, when Western Union completed the conversion to the Western Union Telex II system.
Canada moved its TWX-numbers, as well as Datalink services, to the non-geographic area code 600, effective October 1, 1993, in exchange for returning 610.[12]
The network originally transmitted at a speed of 45.45 baud, or approximately 60 words per minute, using five-bit Baudot code, often referred to as 3-row coding with 32 characters arranged in three key rows of the keyboard.[13][14]
In 1963, AT&T implemented a new coding technology for TWX, called 4-row (64 characters in four key rows) based on the new Teletype Model 33 teleprinter using a 110-baud modem and a subset of the seven-bit ASCII code without lower-case letters.[15] TWX was offered in both 3-row Baudot and 4-row ASCII versions up to the late 1970s.
The modem for the 4-row ASCII service was the Bell 101 dataset, developed by 1958 for military applications. It is the direct ancestor of the Bell 103 modem that launched computer time-sharing. The 101 was revolutionary because it allowed the Bell System to run TWX on its regular voice telephone lines.
The code and speed conversion between 3-row Baudot and 4-row ASCII TWX service was accomplished using a special Bell 10A/B board via a live operator. A TWX customer would place a call to the 10A/B board operator for Baudot–ASCII calls, ASCII–Baudot calls, and also TWX conference calls. The code and speed conversion was facilitated by a special service unit made by Western Electric. Multiple code and speed conversion units were placed at each operator position.
During the conversion to Telex II, the remaining 3-row Baudot customers were converted to the new service during the period 1979 to 1981.
In February 1969, AT&T installed the first electronic switching system (ESS) for TWX service. It was a version of the No. 1ESS switch, arranged for data features (1ESS-AFD) in the Long Lines Department of AT&T. It had a capacity of handling 1,250 4-row teletypewriters.[16] However, due to the purchase of TWX by Western Union, further installations were canceled.
Western Union's Telex II system was re-acquired by AT&T in 1990 in the purchase of the Western Union assets that became AT&T EasyLink Services.[citation needed]
Western Union
In 1958, Western Union started to build a telex network in the United States.[17] This telex network started as a satellite exchange located in New York City and expanded to a nationwide network. Western Union chose Siemens & Halske AG,[18] now Siemens AG, and ITT[19] to supply the exchange equipment, provisioned the exchange trunks via the Western Union national microwave system and leased the exchange to customer site facilities from the local telephone company. Teleprinter equipment was originally provided by Siemens & Halske AG[20] and later by Teletype Corporation.[21] Initial direct international telex service was offered by Western Union, via W.U. International, in the summer of 1960 with limited service to London and Paris.[22] In 1962, the major exchanges were located in New York City (1), Chicago (2), San Francisco (3), Kansas City (4) and Atlanta (5).[23] The telex network expanded by adding the final parent exchange cities of Los Angeles (6), Dallas (7), Philadelphia (8) and Boston (9), starting in 1966.
The telex numbering plan, usually a six-digit number in the United States, was based on the major exchange where the customer's telex machine terminated.[24] For example, all telex customers that terminated in the New York City exchange were assigned a telex number that started with a first digit "1". Further, all Chicago-based customers had telex numbers that started with a first digit of "2". This numbering plan was maintained by Western Union as the telex exchanges proliferated to smaller cities in the United States. The Western Union Telex network was built on three levels of exchanges.[25] The highest level was made up of the nine exchange cities previously mentioned. Each of these cities had the dual capability of terminating telex customer lines and setting up trunk connections to multiple distant telex exchanges. The second level of exchanges, located in large cities such as Buffalo, Cleveland, Miami, Newark, Pittsburgh and Seattle, were similar to the highest level of exchanges in capability of terminating telex customer lines and setting up trunk connections. However, these second level exchanges had a smaller customer line capacity and only had trunk circuits connected to regional cities. The third level of exchanges, located in small to medium-sized cities, could terminate telex customer lines and had a single trunk group running to its parent exchange.
Loop signaling was offered in two different configurations for Western Union Telex in the United States. The first option, sometimes called local or loop service, provided a 60 milliampere loop circuit from the exchange to the customer teleprinter. The second option, sometimes called long distance or polar was used when a 60 milliampere connection could not be achieved, provided a ground return polar circuit using 35 milliamperes on separate send and receive wires. By the 1970s, under pressure from the Bell operating companies wanting to modernize their cable plant and lower the adjacent circuit noise that these telex circuits sometimes caused, Western Union migrated customers to a third option called F1F2. This F1F2 option replaced the DC voltage of the local and long distance options with modems at the exchange and subscriber ends of the telex circuit.
Western Union offered connections from telex to the AT&T Teletypewriter Exchange (TWX) system in May 1966 via its New York Information Services Computer Center.[26] These connections were limited to those TWX machines that were equipped with automatic answerback capability per CCITT standard.
USA-based telex users could send the same message to several places around the world at the same time, like email today, using the Western Union InfoMaster Computer. This involved transmitting the message via paper tape to the InfoMaster Computer (dial code 6111) and specifying the destination addresses for the single text. In this way, a single message could be sent to multiple distant telex and TWX machines as well as delivering the same message to non-telex and non-TWX subscribers via Western Union Mailgram.
International record carriers
International record carrier (IRC) was a term created by the Federal Communications Commission in the United States. Bell's original consent agreement limited it to international dial telephony, and the Western Union Telegraph Company had given up its international telegraphic operation in a 1939 bid to monopolize U.S. telegraphy by taking over ITT'spostal, telegraph and telephone service (PTT) business. The result was a de-emphasis on telex in the U.S. and the creation of several international telex and telegraphy companies, collectively called IRCs:
Western Union Telegraph Company developed a subsidiary named Western Union Cable System. This company was later renamed as Western Union International (WUI) when it was spun off by Western Union as an independent company. WUI was purchased by MCI Communications (MCI) in 1983 and operated as a subsidiary of MCI International.
ITT's "World Communications" division (later known as ITT World Communications) was amalgamated from many smaller companies: Federal Telegraph, All American Cables and Radio, Globe Wireless, and the common carrier division of Mackay Marine. ITT World Communications was purchased by Western Union in 1987.
RCA Communications (later known as RCA Global Communications) had specialized in global radiotelegraphic connections. In 1986, it was purchased by MCI International.
Before World War I, the Tropical Radiotelegraph Company (later known as Tropical Radio Telecommunications, or TRT) put radio telegraphs on ships for its owner, the United Fruit Company (UFC), to enable them to deliver bananas to the best-paying markets. Communications expanded to UFC's plantations, and were eventually provided to local governments. TRT eventually became the national carrier for many small Central American nations.
The French Telegraph Cable Company (later known as FTC Communications, or just FTCC), which was founded in 1871, was owned by French investors and headquartered in the United States; it laid transatlantic cable between the two countries. International telegrams routed via FTCC used routing ID "PQ", the initials of the company's founder, Augustin Pouyer-Quertier (1820–1891).
Firestone Rubber developed its own IRC, the United States-Liberia Radio Corporation,[27] which operated shortwave from Akron, Ohio to the rubber plantations in Liberia.[28][29] Services on this circuit were formally discontinued in 1994.[30]
Bell Telex users had to select which IRC to use, and then append the necessary routing digits. The IRCs converted between TWX and Western Union Telegraph Co. standards.
United Kingdom
Telex began in the UK as an evolution from the 1930s Telex Printergram service, appearing in 1932 on a limited basis. This used the telephone network in conjunction with a Teleprinter 7B and signalling equipment to send a message to another subscriber with a teleprinter, or to the Central Telegraph Office.
In 1945, as the traffic increased, it was decided to have a separate network for telex traffic, and the first manual exchange opened in London. By 1954, the public inland telex service opened via manually switched exchanges. A number of subscribers were served via automatic sub-centres which used relays and Type 2 uniselectors, acting as concentrators for a manual exchange.
In the late 1950s, the decision was made to convert to automatic switching and this was completed by 1961; there were 21 exchanges spread across the country, with one international exchange in London. The equipment used the Strowger system for switching, as was the case for the telephone network. Conversion to Stored Programme Control (SPC) began in 1984 using exchanges made by Canadian Marconi, with the last Strowger exchange closing in 1992. User numbers increased over the ensuing years into the 1990s.
A separate service Secure Stream 300 (previously Circuit Switched Data Network) was a variant of telex running at 300 baud, used for telemetry and monitoring purposes by utility companies and banks, among others. This was a high-security virtual private wire system with a high degree of resilience through diversely routed dual-path network configurations.
After privatization of the telecommunications network under Margaret Thatcher's government at the start of the 1980s, Mercury Communications[31] also provided a telex network, based on T200-series switching equipment[32] supplied by the Swiss company Hasler in 1986 (after 1987 a member of the Ascom company). In 1996 Mercury was incorporated into Cable & Wireless Communications, which continued telex operation until 2006 when the remaining telex subscribers were transferred to Swiss Telex, which operated a multinational telex network until 2020 (also with T200 equipment).
British Telecom stopped offering the telex service to new customers in 2004 and discontinued the service in 2008, allowing users to transfer to Swiss Telex if they wished to continue to use telex.[33]
Canada
Canada-wide automatic teleprinter exchange service was introduced by the CPR Telegraph Company and CN Telegraph in July 1957 (the two companies, operated by rivals Canadian National Railway and Canadian Pacific Railway, would join to form CNCP Telecommunications in 1967). This service supplemented the existing international telex service that was put in place in November 1956. Canadian telex customers could connect with nineteen European countries in addition to eighteen Latin American, African, and trans-Pacific countries.[34] The major exchanges were located in Montreal (01), Toronto (02), and Winnipeg (03).[35]
Decline
Telex is still in operation but not in the sense described in the CCITT Blue Book documentation. iTelegram offers telex-like service without subscriber telex lines. Individual subscribers can use Deskmail, a Windows program that connects to the iTelegram telex network, using IP as the last mile.[36][37] Telex has been mostly superseded by fax, email, and SWIFT, although radiotelex (telex via HF radio) is still used in the maritime industry and is a required element of the Global Maritime Distress and Safety System.
The Baudot code is an early character encoding for telegraphy invented by Émile Baudot in the 1870s. It was the predecessor to the International Telegraph Alphabet No. 2 (ITA2), the most common teleprinter code in use before ASCII. Each character in the alphabet is represented by a series of five bits, sent over a communication channel such as a telegraph wire or a radio signal by asynchronous serial communication. The symbol rate measurement is known as baud, and is derived from the same name.
Present-day telecommunications in Canada include telephone, radio, television, and internet usage. In the past, telecommunications included telegraphy available through Canadian Pacific and Canadian National.
Electrical telegraphy is a point-to-point text messaging system, primarily used from the 1840s until the late 20th century. It was the first electrical telecommunications system and the most widely used of a number of early messaging systems called telegraphs, that were devised to send text messages more quickly than physically carrying them. Electrical telegraphy can be considered the first example of electrical engineering.
Jean-Maurice-Émile Baudot, French telegraph engineer and inventor of the first means of digital communication Baudot code, was one of the pioneers of telecommunications. He invented a multiplexed printing telegraph system that used his code and allowed multiple transmissions over a single line. The baud unit was named after him.
The People's Republic of China possesses a diversified communications system that links all parts of the country by Internet, telephone, telegraph, radio, and television. The country is served by an extensive system of automatic telephone exchanges connected by modern networks of fiber-optic cable, coaxial cable, microwave radio relay, and a domestic satellite system; cellular telephone service is widely available, expanding rapidly, and includes roaming service to foreign countries. Fiber to the x infrastructure has been expanded rapidly in recent years.
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling systems, although sometimes quite extensive and sophisticated as in China, were generally not capable of transmitting arbitrary text messages. Possible messages were fixed and predetermined, so such systems are thus not true telegraphs.
A teleprinter is an electromechanical device that can be used to send and receive typed messages through various communications channels, in both point-to-point and point-to-multipoint configurations.
The Western Union Company is an American multinational financial services corporation headquartered in Denver, Colorado.
The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably Mexico, do not participate with the NANP.
A telecommunications device for the deaf (TDD) is a teleprinter, an electronic device for text communication over a telephone line, that is designed for use by persons with hearing or speech difficulties. Other names for the device include teletypewriter (TTY), textphone, and minicom.
A telegraph code is one of the character encodings used to transmit information by telegraphy. Morse code is the best-known such code. Telegraphy usually refers to the electrical telegraph, but telegraph systems using the optical telegraph were in use before that. A code consists of a number of code points, each corresponding to a letter of the alphabet, a numeral, or some other character. In codes intended for machines rather than humans, code points for control characters, such as carriage return, are required to control the operation of the mechanism. Each code point is made up of a number of elements arranged in a unique way for that character. There are usually two types of element, but more element types were employed in some codes not intended for machines. For instance, American Morse code had about five elements, rather than the two of International Morse Code.
The Teletype Model 33 is an electromechanical teleprinter designed for light-duty office use. It is less rugged and cost less than earlier Teletype models. The Teletype Corporation introduced the Model 33 as a commercial product in 1963, after it had originally been designed for the United States Navy. The Model 33 was produced in three versions:
Telex may refer to:
CNCP Telecommunications was an electrical telegraph operator and later a telecom company, which operated between 1967 and 1990.
The Teletype Corporation, a part of American Telephone and Telegraph Company's Western Electric manufacturing arm since 1930, came into being in 1928 when the Morkrum-Kleinschmidt Company changed its name to the name of its trademark equipment. Teletype was responsible for the research, development and manufacture of data and record communications equipment, but it is primarily remembered for the manufacture of electromechanical teleprinters.
Automatic Telegraph Switching System Plan 55-A was one in a series of store and forward message switching systems developed by Western Union and used from 1948 to 1976 for processing telegrams. It is an automated successor to Plan 51, which commenced service in 1951 in a nationwide network of the U.S. Air Force, but required semi-automatic operation.
Donald Murray was an electrical engineer and the inventor of a telegraphic typewriter system using an extended Baudot code that was a direct ancestor of the teleprinter. He can justifiably be called the "Father of the remote Typewriter".
In the nineteenth century, the United Kingdom of Great Britain and Ireland had the world's first commercial telegraph company. British telegraphy dominated international telecommunications well into the twentieth. Telegraphy is the sending of textual messages by human operators using symbolic codes. Electrical telegraphy used conducting wires to send messages, often incorporating a telegram service to deliver the telegraphed communication from the telegraph office. This is distinct from optical telegraphy that preceded it and the radiotelegraphy that followed. Though Francis Ronalds first demonstrated a working telegraph over a substantial distance in 1816, he was unable to put it into practical use. Starting in 1836, William Fothergill Cooke, with the scientific assistance of Charles Wheatstone, developed the Cooke and Wheatstone telegraph. The needle telegraph instrument suggested by Wheatstone, the battery invented by John Frederic Daniell, and the relay invented by Edward Davy were important components of this system.
The T200 telex switching system produced by Hasler Ltd of Berne broke new ground in the modernization and spread of Telex. During the 1970s and 1980s it pioneered the introduction of digital equipment and the deployment of Stored Program Controlled (SPC) Exchanges, gradually replacing the former electromechanical telex networks.
References
↑ Hearings, Reports and Prints of the House Committee on Interstate and Foreign Commerce. United States. Congress. House. Committee on Interstate and Foreign Commerce. 1979. pp.715–.
↑ Joel, A.E.; Schindler Jr., G.E. (1982). History of Science and Engineering in the Bell System; Switching Technology (1925–1975). Bell Telephone Laboratories. p.276.
↑ Easterlin, Phillip R. (April 1959). "Telex in New York". Western Union Technical Review: 45. ISSN0096-6452. OCLC1769771.
↑ Easterlin, Phillip R. (October 1960). "Telex in Private Wire Systems". Western Union Technical Review: 131.
↑ Chin, James S.; Gomerman, Jan J. (July 1966). "CSR4 Exchange". Western Union Technical Review: 142–9.
↑ Smith, Fred W. (October 1960). "European Teleprinters". Western Union Technical Review: 172–4.
↑ Smith, Fred W. (January 1964). "A New Line of Light-duty Teleprinters and ASR Sets". Western Union Technical Review: 18–31.
↑ O’Sullivan, T.J. (July 1963). "TW 56 Concentrator". Western Union Technical Review: 111–2.
↑ Easterlin, Phillip R. (January 1962). "Telex in the U.S.A.". Western Union Technical Review: 2–15.
↑ Jockers, Kenneth M. (July 1966). "Planning Western Union Telex". Western Union Technical Review: 92–95.
↑ Jockers, Kenneth M. (July 1966). "Planning Western Union Telex". Western Union Technical Review: 94 figure 2.
↑ Wernikoff, Sergio (July 1966). "Information Services Computer Center". Western Union Technical Review: 130.
↑ Hochreutener. "The application of the T200 telex and data switching system in Switzerland". International Switching Symposium Kyoto October 25–29, 1976 Tokyo JP: 431-3-1 - 431-3-8.
↑ Colombo, C.J. (January 1958). "Telex in Canada". Western Union Technical Review: 21.
↑ Easterlin, Phillip R. (April 1959). "Telex in New York". Western Union Technical Review: 47 figure 4.
↑ "International Telegram® - Answers to some common questions". itelegram.com. 2017. Retrieved 2017-05-18. Western Union closed its telegram service in January, 2006. Western Union is now the fastest way to send money online, and iTelegram is the fastest way to send telegram messages. Western Union's telex/cablegram network, Mailgram® service, and Deskmail/Infomaster services are now a part of International Telegram.
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