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87-820: The Boeing C-40 Clipper is a military version of the Boeing 737 Next Generation used to transport cargo and passengers. It is used by the United States Navy , Air Force , and Marine Corps . The Navy C-40A variant is named "Clipper", whereas the USAF C-40B/C variants are officially unnamed. The C-40 combines the Boeing 737-700 fuselage with the strengthened wings and landing gear of the larger and heavier 737-800 . It also has auxiliary fuel tanks allowing an unrefueled range of up to 5,000 nautical miles (9,300 km) compared with 3,010 nmi (5,570 km) for

174-464: A baseband signal which is bound to the lowest end of the spectrum, see line coding ), it is still occupying a single channel. The key difference is that what is typically considered a broadband signal in this sense is a signal that occupies multiple (non-masking, orthogonal ) passbands, thus allowing for much higher throughput over a single medium but with additional complexity in the transmitter/receiver circuitry. The term became popularized through

261-504: A glass cockpit , and upgraded and redesigned interior configurations. The series includes four variants, the –600/–700/–800/–900, seating between 108 and 215 passengers. The 737NG's primary competition is the Airbus A320 family . As of September 2024 , a total of 7,126 737NG aircraft had been ordered, of which 7,112 had been delivered, with remaining orders for two -700, two -800, and 10 -800A variants. The most-ordered variant

348-422: A 17-year-old 737-800W will be worth $ 9.5 million and leased for $ 140,000 per month. As of May 2019, Boeing had delivered 4,979 737-800s, 116 737-800As, and 21 737-800 BBJ2s, and has twelve 737-800 unfilled orders. The 737-800 is the best-selling variant of the 737NG and is the most widely used narrow-body aircraft. Ryanair , an Irish low-cost airline , is among the largest operators of the Boeing 737-800, with

435-427: A 171,000-pound (78,000 kg) MTOW , but with a cargo payload capacity significantly decreased from 966 to 165 cu ft (27.4 to 4.7 m ), trading payload for increased range of 5,775 nmi (10,695 km; 6,646 mi). The first was delivered on February 16, 2007, to ANA with 24 business-class and 24 premium-economy seats only. A 737-700 can typically accommodate 126 passengers in two classes. It

522-630: A 5.5% fuel savings per aircraft compared to 3.3% savings for the blended winglets. Southwest Airlines flew their first flight of a 737-800 with Split Scimitar winglets on April 14, 2014. The wing was redesigned with a new thinner airfoil section, and a greater chord and increased wing span (by 16 ft [4.9 m]) increased the wing area by 25%, which also increased total fuel capacity by 30%. New quieter and more fuel-efficient CFM56-7B engines are used. Higher MTOWs are offered. The 737NG includes redesigned vertical stabilizers, and winglets are available on most models. The 737NG encompasses

609-528: A 737-800 fuel burn of 4.88 US gal (18.5 L) per seat per hour, compared to 5.13 US gal (19.4 L) for the A320. In 2011, United Airlines — flying a Boeing 737-800 from Houston to Chicago—operated the first U.S. commercial flight powered by a blend of algae-derived biofuel and traditional jet fuel to reduce its carbon footprint . In early 2017, a new 737-800 was valued at $ 48.3 million, falling to below $ 47 million by mid-2018. By 2025,

696-492: A 737-800 results in 0.5% reduction in fuel burn. Delta Air Lines received the first Next-Gen 737 model with this brake package, a 737-700, at the end of July 2008. The CFM56-7B Evolution nacelle began testing in August 2009 to be used on the new 737 PIP (Performance Improvement Package) due to enter service mid-2011. This new improvement is said to shave at least 1% off the overall drag and have some weight benefits. Overall, it

783-454: A MTOW of 174,100 lb (79,000 kg). In 2015, Boeing launched the 737-800SF passenger to freighter conversion program with Aeronautical Engineers Inc (AEI). The conversion can be completed by AEI or third parties such as HAECO . GECAS was the initial customer. It has a 52,800-pound (23,900 kg) payload capacity, and a range of 2,000 nautical miles (3,700 km; 2,300 mi). It received its supplemental type certificate from

870-499: A broadband network can be classified according to three characteristics: Cellular networks utilize various standards for data transmission, including 5G which can support one million separate devices per square kilometer. The types of traffic found in a broadband network (with examples) and their respective requirements are summarised in Table 1. Many computer networks use a simple line code to transmit one type of signal using

957-682: A computer-based passenger data system. The C-40C is a VIP transport aircraft often used to carry members of the Cabinet and Congress, and is intending to replace the Boeing C-22 . The aircraft is equipped similarly to the C-40B, but without the advanced communications capabilities. Unique to the C-40C is the capability to change its configuration to accommodate from 42 to 111 passengers. The C-40C replaced three C-22s (a militarized Boeing 727) operated by

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1044-449: A diversity of services (multi-services). The Broadband Integrated Services Digital Network (B-ISDN) was planned to provide these characteristics. Asynchronous Transfer Mode (ATM) was promoted as a target technology for meeting these requirements. Different criteria for "broad" have been applied in different contexts and at different times. Its origin is in physics, acoustics , and radio systems engineering, where it had been used with

1131-416: A fleet of over 400 of the -800 variant serving routes across Europe, Middle East, and North Africa. In February 2016, Boeing launched a passenger-to-freighter conversion program, with converted aircraft designated as 737-800BCF (for Boeing Converted Freighter). Boeing started the program with orders for 55 conversions, with the first converted aircraft due for late 2017 delivery. The first converted aircraft

1218-533: A lawsuit on behalf of the U.S. government, claiming that dozens of 737NG contained defective structural elements supplied by airframe manufacturer Ducommun , allegations denied by Boeing. The federal judge presiding the case sided with Boeing, and a subsequent court of appeal also ruled in favor of the company. A 2010 documentary by Al Jazeera alleged that in three crashes involving 737NGs— Turkish Airlines Flight 1951 , American Airlines Flight 331 , and AIRES Flight 8250 —the fuselage broke up following impact with

1305-566: A lifetime of 90,000 flights. Boeing reported the issue to the FAA at the end of September 2019, and more planes showed similar cracking after inspection. The cracks were found in an airliner with more than 33,500 flights, when it was stripped down for conversion to freighter. Aircraft with more than 30,000 flights (15 years at 2,000 flights per year) should be inspected within one week, while those with over 22,600 flights (11 years) should be inspected within one year. The FAA Airworthiness Directive (AD)

1392-413: A meaning similar to " wideband ", or in the context of audio noise reduction systems , where it indicated a single-band rather than a multiple-audio-band system design of the compander . Later, with the advent of digital telecommunications , the term was mainly used for transmission over multiple channels . Whereas a passband signal is also modulated so that it occupies higher frequencies (compared to

1479-441: A medium's full bandwidth using its baseband (from zero through the highest frequency needed). Most versions of the popular Ethernet family are given names, such as the original 1980s 10BASE5 , to indicate this. Networks that use cable modems on standard cable television infrastructure are called broadband to indicate the wide range of frequencies that can include multiple data users as well as traditional television channels on

1566-406: A new -700 stayed around $ 35 million from 2008 to 2018. A 2003 aircraft was valued for $ 15.5 million in 2016 and $ 12 million in 2018 and will be scrapped for $ 6 million by 2023. The 737-700C is a convertible version where the seats can be removed to carry cargo instead. There is a large door on the left side of the aircraft. The United States Navy was the launch customer for the 737-700C under

1653-472: A synonym for wideband . "Broadband" in analog video distribution is traditionally used to refer to systems such as cable television , where the individual channels are modulated on carriers at fixed frequencies. In this context, baseband is the term's antonym , referring to a single channel of analog video, typically in composite form with separate baseband audio . The act of demodulating converts broadband video to baseband video. Fiber optic allows

1740-475: A wide band of frequencies. "Broadband" is a relative term, understood according to its context. The wider (or broader) the bandwidth of a channel, the greater the data-carrying capacity, given the same channel quality. In radio , for example, a very narrow band will carry Morse code , a broader band will carry speech, and a still broader band will carry music without losing the high audio frequencies required for realistic sound reproduction . This broad band

1827-420: A wide range of complexity and quality of audio reproduction. Similarly, full motion video signals may be encoded with bit-rates ranging from less than 1 Mbit/s to hundreds of Mbit/s. Thus a network transporting both video and audio signals may have to integrate traffic with a very broad range of bit-rates. Traditionally, different telecommunications services were carried via separate networks: voice on

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1914-475: A wide-spread frequency' and for services that were analog at the lowest level, nowadays in the context of Internet access , 'broadband' is often used to mean any high-speed Internet access that is seemingly always 'on' and is faster than dial-up access over traditional analog or ISDN PSTN services. The ideal telecommunication network has the following characteristics: broadband , multi-media , multi-point , multi-rate and economical implementation for

2001-491: Is a twin-engine narrow-body aircraft produced by Boeing Commercial Airplanes . Launched in 1993 as the third generation derivative of the Boeing 737 , it has been produced since 1997. The 737NG is an upgrade of the 737 Classic (–300/–400/–500) series. Compared to the 737 Classic, it has a redesigned wing with a larger area, a wider wingspan, greater fuel capacity, and higher maximum takeoff weights (MTOW) and longer range. It has CFM International CFM56-7 series engines,

2088-479: Is available for the 737NG models and standard equipment for the 737-900ER. In July 2008, Boeing offered Messier-Bugatti-Dowty 's new carbon brakes for the Next-Gen 737s, which are intended to replace steel brakes and will reduce the weight of the brake package by 550–700 pounds (250–320 kg) depending on whether standard or high-capacity steel brakes were fitted. A weight reduction of 700 pounds (320 kg) on

2175-434: Is claimed to have a 2% improvement on fuel burn on longer stages. This short-field design package is an option on the 737-600, -700, and -800 and is standard equipment for the new 737-900ER. These enhanced short runway versions could increase pay or fuel loads when operating on runways under 5,000 feet (1,500 m). Landing payloads were increased by up to 8,000 lb on the 737-800 and 737-900ER and up to 4,000 lb on

2262-462: Is converted to a non-loaded twisted-pair wire (no telephone filters), it becomes hundreds of kilohertz wide (broadband) and can carry up to 100 megabits per second using very high-bit rate digital subscriber line ( VDSL or VHDSL) techniques. Modern networks have to carry integrated traffic consisting of voice, video and data. The Broadband Integrated Services Digital Network (B-ISDN) was designed for these needs. The types of traffic supported by

2349-476: Is equipped with a crew rest area, distinguished visitor compartment with sleep accommodations, two galleys and business class seating with worktables. The C-40B is designed to be an "office in the sky" for senior military and government leaders. The aircraft features two-way broadband data communications, including secure voice and data communication; elements include internet and network access, telephones, satellites, facsimile and copy machines. The C-40B also has

2436-525: Is often divided into channels or "frequency bins" using passband techniques to allow frequency-division multiplexing instead of sending a higher-quality signal. In data communications, a 56k modem will transmit a data rate of 56 kilobits per second (kbit/s) over a 4-kilohertz-wide telephone line (narrowband or voiceband ). In the late 1980s, the Broadband Integrated Services Digital Network (B-ISDN) used

2523-639: Is similar to the Airbus A319LR . The Boeing 737-800 is a stretched version of the 737-700. It replaced the 737-400 and competes primarily with the Airbus A320 . The 737-800 seats 162 passengers in a two-class layout or 189 passengers in a one-class layout. The 737−800 was launched on September 5, 1994. Launch customer Hapag-Lloyd Flug (now TUI fly Deutschland ) received the first one in April 1998. Following Boeing's merger with McDonnell Douglas,

2610-480: Is the ITU-T G.hn standard, which provides a way to create a local area network up to 1 Gigabit/s (which is considered high-speed as of 2014) using existing home business and home wiring (including power lines, but also phone lines and coaxial cables ). In 2014, researchers at Korea Advanced Institute of Science and Technology made developments on the creation of ultra-shallow broadband optical instruments . In

2697-830: The Air National Guard and National Guard Bureau to airlift personnel. The C-40C was the first military aircraft to be acquired in this as an off-the-shelf aircraft for the Department of Defense. The 201st Airlift Squadron, District of Columbia Air National Guard acquired two C-40C aircraft in October 2002. The Air Force Reserve 932d Airlift Wing , Scott AFB, Illinois acquired three C-40C aircraft in 2007. Data from General characteristics Performance Related development Related lists Boeing 737 Next Generation The Boeing 737 Next Generation , commonly abbreviated as 737NG , or 737 Next Gen ,

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2784-632: The Airbus A319 . In long-range cruise, it burns 4,440 lb (2,010 kg) per hour at Mach 0.785 (450 kn; 834 km/h) and FL410, increasing to 4,620–4,752 lb (2,096–2,155 kg) at Mach 0.80 – Mach 0.82 (459–470 kn; 850–871 km/h). As of July 2018, all -700 series on order, 1,128 -700, 120 -700 BBJ, 20 -700C, and 14 -700W aircraft, have been delivered. By June 2018, around one thousand were in service: half of them with Southwest Airlines , followed by WestJet with 56 and United Airlines with 39. The value of

2871-514: The FAA in early 2019. In March 2019, the first AEI converted aircraft was delivered to Ethiopian Airlines on lease from GECAS. The Civil Aviation Administration of China cleared it in January 2020. Aircraft lessor Macquarie AirFinance ordered four 737-800SFs in March 2021. Boeing later introduced the 737-900, an even longer variant stretched to 138 ft 2 in (42.11 m). Because

2958-679: The Naval Air Station Jacksonville , Florida. Further aircraft have been delivered to VR-57 at the Naval Air Station North Island , California. The C-40A provides superior fuel efficiency , range and payload compared to the C-9B aircraft it replaced. In the 2018 Marine Aviation Plan, the U.S. Marine Corps indicated that it intended to acquire two C-40A aircraft for airlift missions, replacing its Skytrain fleet. On 4 December 2018 an online notice

3045-422: The -600, -700, -800, and -900 with improved performance and commonality retained from previous 737 models. The wing, engine, and fuel capacity improvements combined increase the 737's range by 900 nautical miles [nmi] (1,700 km; 1,000 mi) to over 3,000 nmi (5,600 km; 3,500 mi), permitting transcontinental service. The Speed Trim System, introduced on the 737 Classic, has been updated for

3132-594: The 1990s as a marketing term for Internet access that was faster than dial-up access (dial-up being typically limited to a maximum of 56 kbit/s). This meaning is only distantly related to its original technical meaning. Since 1999, broadband Internet access has been a factor in public policy . In that year, at the World Trade Organization Biannual Conference called “ Financial Solutions to Digital Divide ” in Seattle,

3219-615: The 737-500 and is similar to the Airbus A318 . Winglets were not an option. WestJet was to launch the -600 with winglets, but dropped them in 2006. In November 1993, Southwest Airlines launched the Next-Generation program with an order for 63 737-700s and took delivery of the first one in December 1997. It replaced the 737-300, typically seating 126 passengers in two classes to 149 in all-economy configuration, similar to

3306-627: The 737-600 and 737-700. Takeoff payloads were increased by up to 2,000 lb on the 737-800 and 737-900ER and up to 400 lb on the 737-600 and 737-700. The package includes: The first enhanced version was delivered to Gol Transportes Aéreos (GOL) on July 31, 2006. At that time, twelve customers had ordered the package for more than 250 airframes. Customers include: GOL, Alaska Airlines , Air Europa , Air India , Egyptair , GE Commercial Aviation Services (GECAS), Hapagfly , Japan Airlines , Pegasus Airlines , Ryanair , Sky Airlines and Turkish Airlines . In 2005, three ex-Boeing employees filed

3393-512: The 737-800 also filled the gap left by Boeing's decision to discontinue the McDonnell Douglas MD-80 and MD-90 aircraft. For many airlines in the U.S., the 737-800 replaced aging Boeing 727-200 trijets . The 737-800 burns 850 US gallons (3,200 L) of jet fuel per hour—about 80 percent of the fuel used by an MD-80 on a comparable flight, while carrying more passengers. The Airline Monitor, an industry publication, quotes

3480-522: The 737-800, and has increased range (through the use of extra fuel tanks) over the other various 737 models. The first BBJ rolled out on August 11, 1998, and flew for the first time on September 4. A total of 113 BBJ1s were delivered to customers. On October 11, 1999, Boeing launched the BBJ2. Based on the 737-800, it is 19 ft 2 in (5.84 m) longer than the BBJ1, with 25% more cabin space and twice

3567-480: The 737NG to include a stall identification function. Originally inhibited in high alpha scenarios, STS operates at any speed on the 737NG. STS is triggered by airspeed sensor and commands Airplane Nose Down as the airplane slows down. The flight deck was upgraded with modern avionics, and passenger cabin improvements similar to those on the Boeing 777 , including more curved surfaces and larger overhead bins than previous-generation 737s. The Next Generation 737 interior

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3654-514: The Boeing Converted Freighter design because the operational economics are attractive due to the low operating costs and availability of certified pilots on a robust airframe. Modifications to the 737-800 airframe include installing a large cargo door, a cargo handling system, and additional accommodations for non-flying crew or passengers. The aircraft is designed to fly up to 1,995 nmi (3,695 km; 2,296 mi) at

3741-639: The FCC in December 2017. A number of national and international regulators categorize broadband connections according to upload and download speeds, stated in Mbit/s ( megabits per second ). In Australia, the Australian Competition and Consumer Commission also requires Internet Service Providers to quote speed during night time and busy hours Bandwidth has historically been very unequally distributed worldwide with increasing concentration in

3828-559: The U.S. Navy Reserve. The Navy Reserve provides all of the Navy's medium and heavy airlift capabilities. The Clipper meets or exceeds international noise and environmental requirements, which the fleet of Naval Reserve C-9s did not. It is also more fuel-efficient and offers increased range and payload capabilities. The Clipper is certified to operate in an all-passenger (121 passengers), all-cargo or combination ("combi") configuration that can accommodate up to three cargo pallets and 70 passengers on

3915-477: The US in-service fleet of 1,930. By early November, 1,200 aircraft were inspected, with cracks on about 60 (5%). Cracks were discovered near fasteners outside the original area in four airplanes. On November 5, Boeing recommended expanding the checks to include them, to be mandated in a November 13 FAA AD . Aircraft below 30,000 cycles were to be reinspected within 1,000 cycles, within 60 days above. About one-quarter of

4002-688: The aging fleet of C-137 aircraft used to transport U.S. combatant commanders. The Air Force awarded the medium lift contract in August 2000. The 89th Airlift Wing acquired its first C-40B aircraft in December 2002. Both units are based at Andrews Air Force Base , Maryland . The 15th Airlift Wing , Hickam AFB , Hawaii , acquired its C-40B for U.S. Pacific Command in February 2003. The 86th Airlift Wing , Ramstein AB , Germany , acquired its C-40B for U.S. Air Forces in Europe in December 2004. The cabin area

4089-638: The baggage space, but with slightly reduced range. It is also fitted with auxiliary fuel tanks in the cargo hold and winglets. The first BBJ2 was delivered on February 28, 2001. A total of 23 BBJ2s were delivered to customers. The BBJ3 aircraft is based on the 737-900ER aircraft. The BBJ3 is approximately 16 feet (4.9 m) longer than the BBJ2 and has a slightly shorter range. Seven BBJ3s were delivered to customers. As of July 2018, 6,343 Boeing 737 Next Generation aircraft were in commercial service. This comprised 69 -600s, 1,027 -700s, 4,764 -800s and 513 -900s. Broadband Originally used to mean 'using

4176-582: The connection and media requests of a multipoint, multimedia communication call. A multirate service network is one which flexibly allocates transmission capacity to connections. A multimedia network has to support a broad range of bit-rates demanded by connections, not only because there are many communication media, but also because a communication medium may be encoded by algorithms with different bit-rates. For example, audio signals can be encoded with bit-rates ranging from less than 1 kbit/s to hundreds of kbit/s, using different encoding algorithms with

4263-471: The context of Internet access , the term "broadband" is used loosely to mean "access that is always on and faster than the traditional dial-up access". A range of more precise definitions of speed have been prescribed at times, including: Broadband Internet service in the United States was effectively treated or managed as a public utility by net neutrality rules until being overturned by

4350-409: The delivery on May 15, 2001. The type proved unpopular, with only 52 delivered, before being replaced by the improved 737-900ER. The 737-900ER (Extended Range), which was called the 737-900X before launch, was the final and largest variant of the Boeing 737 NG line. It was introduced to fill the range and passenger capacity gap in Boeing's product offerings after the 757-200 was discontinued, address

4437-470: The digital age. Historically only 10 countries have hosted 70–75% of the global telecommunication capacity (see pie-chart Figure on the right). In 2014, only three countries (China, the US, and Japan) host 50% of the globally installed telecommunication bandwidth potential. The U.S. lost its global leadership in terms of installed bandwidth in 2011, being replaced by China, which hosts more than twice as much national bandwidth potential in 2014 (29% versus 13% of

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4524-779: The economy of sharing. This economy motivates the general idea of an integrated services network. Integration avoids the need for many overlaying networks, which complicates network management and reduces flexibility in the introduction and evolution of services. This integration was made possible with advances in broadband technologies and high-speed information processing of the 1990s. While multiple network structures were capable of supporting broadband services, an ever-increasing percentage of broadband and MSO providers opted for fibre-optic network structures to support both present and future bandwidth requirements. CATV (cable television), HDTV (high definition television), VoIP (voice over internet protocol), and broadband internet are some of

4611-420: The fact that the 10PASS-TS standard for Ethernet ratified in 2008 used DSL technology, and both cable and DSL modems often have Ethernet connectors on them. A television antenna may be described as "broadband" because it is capable of receiving a wide range of channels, while e.g. a low-VHF antenna is "narrowband" since it receives only 1 to 5 channels. The U.S. federal standard FS-1037C defines "broadband" as

4698-475: The factory for test flights on Day 10. Boeing stopped assembling passenger 737NGs in 2019. The last aircraft assembled was a 737-800 registered PH-BCL delivered to KLM in December 2019; the last two deliveries were to China Eastern Airlines on January 5, 2020. Production of the P-8 Poseidon variant continues. The FAA has proposed a fine of approximately $ 3.9 million for Boeing's alleged installation of

4785-569: The fuselage. A total of 505 -900ERs were delivered. In the late 1980s, Boeing marketed the Boeing 77-33 jet, a business jet version of the 737-300. The name was short-lived. After the introduction of the next generation series, Boeing introduced the Boeing Business Jet (BBJ). The BBJ (retroactively referred to as the BBJ1) was similar in dimensions to the 737-700 but had additional features, including stronger wings and landing gear from

4872-707: The global NG fleet of 6,300 aircraft were to be inspected. Following the contained engine failure of the Southwest Airlines Flight 1380 on April 17, 2018, the National Transportation Safety Board (NTSB) recommended on November 19, 2019, to redesign and retrofit its nacelle for the 6,800 airplanes in service. Boeing was to increase 737 production from 31.5 units per month in September 2010 to 35 in January 2012 and to 38 units per month in 2013. Production rate

4959-421: The ground because of the defective structural components that were the subject of the 2005 lawsuit. However, the accident investigations in all three cases did not highlight any link between post-impact structural failures and manufacturing issues. During an inspection of a 737NG in 2019 that had 35,000 flights, fatigue cracks were found on a fuselage-to-wing attachment known as a "pickle fork", designed to last

5046-402: The information generated by other media. For example, voice could be transcribed into data via voice recognition, and data commands may control the way voice and video are presented. These interactions most often occur at the communication terminals, but may also occur within the network. Traditional voice calls are predominantly two party calls, requiring a point-to-point connection using only

5133-549: The information into the system. However, "broadband video" in the context of streaming Internet video has come to mean video files that have bit-rates high enough to require broadband Internet access for viewing. "Broadband video" is also sometimes used to describe IPTV Video on demand . Power lines have also been used for various types of data communication. Although some systems for remote control are based on narrowband signaling, modern high-speed systems use broadband signaling to achieve very high data rates. One example

5220-549: The main deck. The Navy purchased the airplanes using standard commercial practices, ordering six of the 737-700C models. The first two of four aircraft were delivered on 21 April 2001 to Fleet Logistics Support Squadron Five Nine (VR-59) at the Naval Air Station/Joint Reserve Base Fort Worth, Texas , with two more aircraft following before the end of the year. The fifth and sixth aircraft were delivered in August 2002 to VR-58 at

5307-492: The military designation C-40 Clipper . Boeing launched the 737-700ER (Extended Range) on January 31, 2006, with All Nippon Airways as the launch customer. Inspired by the Boeing Business Jet , it features the fuselage of the 737-700 and the wings and landing gear of the 737-800. When outfitted with nine auxiliary fuel tanks, it can hold 10,707 US gallons (40,530 L; 8,915 imp gal) of fuel with

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5394-412: The most common applications now being supported by fibre optic networks, in some cases directly to the home (FTTh – Fibre To The Home). These types of fibre optic networks incorporate a wide variety of products to support and distribute the signal from the central office to an optic node, and ultimately to the subscriber (end-user). In telecommunications , a broadband signalling method is one that handles

5481-520: The new variants, the −600 series, is identical in size to the −500, launching in December 1997 with an initial flight occurring January 22, 1998; it was granted FAA certification on August 18, 1998. The flight test program used 10 aircraft: 3 -600s, 4 -700s, and 3 -800s. In 2004, Boeing offered a Short Field Performance package in response to the needs of Gol Transportes Aéreos , which frequently operates from restricted airports. The enhancements improve takeoff and landing performance. The optional package

5568-461: The other hand, data networks which store and forward messages using computers had limited connectivity, usually did not have sufficient bandwidth for digitised voice and video signals, and suffer from unacceptable delays for the real-time signals. Television networks using radio or cables were largely broadcast networks with minimum switching facilities. It was desirable to have a single network for providing all these communication services to achieve

5655-422: The pivoting bins, thus allowing a 737-800 to hold 174 carry-on bags . Boeing also offered it as a retrofit for older 737NG aircraft. The 737-600 was launched by SAS in March 1995, with the first aircraft delivered in September 1998. A total of 69 have been produced, with the last aircraft delivered to WestJet in 2006. Boeing displayed the 737-600 in its price list until August 2012. The 737-600 replaces

5742-471: The plant on Day 1. Electrical wiring is installed on Day 2 and hydraulic machinery on Day 3. On Day 4 the fuselage is crane-lifted and rotated 90 degrees, wings are mated to the airplane in a six-hour process, along with landing gear , and the airplane is again rotated 90 degrees. The final assembly process begins on Day 6 with the installation of airline seats , galleys , lavatories , overhead bins , etc. Engines are attached on Day 8 and it rolls out of

5829-580: The present overcrowded radio spectrum. A modern telecommunications network (such as the broadband network) must provide all these different services ( multi-services ) to the user. Conventional telephony communication used: Modern services can be: These aspects are examined individually in the following three sub-sections. A multimedia call may communicate audio, data, still images, or full-motion video , or any combination of these media. Each medium has different demands for communication quality, such as: The information content of each medium may affect

5916-493: The same cable. Broadband systems usually use a different radio frequency modulated by the data signal for each band. The total bandwidth of the medium is larger than the bandwidth of any channel. The 10BROAD36 broadband variant of Ethernet was standardized by 1985, but was not commercially successful. The DOCSIS standard became available to consumers in the late 1990s, to provide Internet access to cable television residential customers. Matters were further confused by

6003-631: The same faulty components of the 737 MAX on some one hundred and thirty-three 737 NGs. From 2006, Boeing discussed replacing the 737 with a "clean sheet" design (internally named " Boeing Y1 ") that could follow the Boeing 787 Dreamliner . A decision on this replacement was postponed, and delayed into 2011. In 2011, Boeing launched the 737 MAX, an updated and re-engined version of the 737NG with more efficient CFM International LEAP -1B engines, and aerodynamic changes with distinctive split-tip winglets . The first 737 MAX performed its first flight in January 2016. The fourth generation 737 MAX supersedes

6090-477: The shortcomings of the 737-900, and to directly compete with the Airbus A321 . Up to two auxiliary fuel tanks in the cargo hold and standard winglets improved the range of the stretched jet to that of other 737NG variants, while an additional pair of exit doors and a flat rear pressure bulkhead increased maximum seating capacity to 220 passengers. Airlines may deactivate (plug) the additional exit doors if

6177-413: The signal to be transmitted farther without being repeated. Cable companies use a hybrid system using fiber to transmit the signal to neighborhoods and then changes the signal from light to radio frequency to be transmitted over coaxial cable to homes. Doing so reduces the use of having multiple head ends. A head end gathers all the information from the local cable networks and movie channels and then feeds

6264-615: The slower, shorter-range 737 Classic variants into the more efficient, longer New Generation variants. In 1991, Boeing initiated development of an updated series of aircraft. After working with potential customers, the 737 Next Generation (NG) program was announced on November 17, 1993. The first NG to roll out was a 737−700, on December 8, 1996. This aircraft, the 2,843rd 737 built, first flew on February 9, 1997, with pilots Mike Hewett and Ken Higgins. The prototype 737−800 rolled out on June 30, 1997, and first flew on July 31, 1997, piloted by Jim McRoberts and again by Hewett. The smallest of

6351-535: The standard 737-700. First flight took place in April 2000 and the first of the C-40A aircraft entered service in April 2001. The U.S. Navy Reserve was the first customer for a 737 Next Generation based "combi" aircraft (capable of transporting cargo and passengers). The Clipper was ordered by the U.S. Navy to replace its fleet of aging C-9B Skytrain IIs . The C-40A is the first new logistics aircraft in 17 years to join

6438-410: The telephone network, data on computer networks such as local area networks , video teleconferencing on private corporate networks, and television on broadcast radio or cable networks. These networks were largely engineered for a specific application and are not suited to other applications. For example, the traditional telephone network is too noisy and inefficient for bursty data communication. On

6525-438: The term to refer to a broad range of bit rates , independent of physical modulation details. The various forms of digital subscriber line (DSL) services are broadband in the sense that digital information is sent over multiple channels. Each channel is at a higher frequency than the baseband voice channel, so it can support plain old telephone service on a single pair of wires at the same time. However, when that same line

6612-444: The term “Meaningful Broadband” was introduced to the world leaders, leading to the activation of a movement to close the digital divide . Fundamental aspects of this movement are to suggest that the equitable distribution of broadband is a fundamental human right. Personal computing facilitated easy access, manipulation, storage, and exchange of information, and required reliable data transmission. Communicating documents by images and

6699-487: The third generation 737NG. Split Scimitar winglets became available in 2014 for the 737-800, 737-900ER, BBJ2 and BBJ3, and in 2015 for the 737-700, 737-900 and BBJ1. These resemble the 737 MAX's split winglet, though they are not identical. Split Scimitar winglets were developed by Aviation Partners , the same Seattle-based corporation that developed the blended winglets; the Split Scimitar winglets produce up to

6786-454: The total configured capacity of the plane is 189 passengers or less. The first 737-900ER was rolled out of the Renton, Washington , factory on August 8, 2006, for its launch customer, Lion Air , an Indonesian low-cost airline . The airline received this aircraft on April 27, 2007, in a special dual paint scheme combining Lion Air's logo on the vertical stabilizer and Boeing's livery colors on

6873-412: The use of high-resolution graphics terminals provided a more natural and informative mode of human interaction than do voice and data alone. Video teleconferencing enhances group interaction at a distance. High-definition entertainment video improves the quality of pictures, but requires much higher transmission rates. These new data transmission requirements may require new transmission means other than

6960-556: The voice medium. To access pictorial information in a remote database would require a point-to-point connection that sends low bit-rate queries to the database and high bit-rate video from the database. Entertainment video applications are largely point-to-multi-point connections, requiring one way communication of full motion video and audio from the program source to the viewers. Video teleconferencing involves connections among many parties, communicating voice, video, as well as data. Offering future services thus requires flexible management of

7047-453: The −900 retains the same exit configuration of the -800, seating capacity is limited to 189, although aircraft equipped with a typical 2-class layout will seat approximately 177. The 737-900 also retains the MTOW and fuel capacity of the −800, trading range for payload. Alaska Airlines launched the 737-900 in 1997, the 737-900 made its first flight on August 3, 2000, and Alaska Airlines accepted

7134-589: Was 42 units per month in 2014, and was planned to reach rates of 47 units per month in 2017 and 52 units per month in 2018. In 2016, the monthly production rate was targeted to reach 57 units per month in 2019, even to the factory limit of 63 units later. A single airplane was then produced in the Boeing Renton Factory in 10 days, less than half what it was a few years before. The empty fuselage from Spirit AeroSystems in Wichita, Kansas , enters

7221-500: Was also adopted on the Boeing 757-300 . This improved on the previous interior of the Boeing 757-200 and the Boeing 737 Classic variants, the new interior became optional on the 757-200. In 2010, new interior options for the 737NG included the 787 -style Boeing Sky Interior. It introduced new pivoting overhead bins (a first for a Boeing narrow-body aircraft), new sidewalls, new passenger service units, and LED mood lighting. Boeing's newer "Space Bins" can carry 50 percent more than

7308-423: Was delivered to West Atlantic in April 2018. At the 2018 Farnborough Airshow , GECAS announced an agreement for 20 firm orders and 15 option orders for the 737-800BCF, raising the commitment to 50 aircraft. Total orders and commitments include 80 aircraft to over half a dozen customers. Since early 737NG aircraft become available on the market, they have been actively marketed to be converted to cargo planes via

7395-455: Was issued on October 3, 2019. Of the 500 first inspected aircraft, 5% (25) had cracks and were grounded; Boeing expected to repair the first aircraft three weeks after the issuance of the directive, serving as the template for the resulting Service bulletin . Of the 810 examined aircraft over 30,000 cycles, 38 had structural cracks (4.7%), leaving 1,911 737NGs over 22,600 cycles to be inspected within their next 1,000 cycles, i.e., nearly all of

7482-524: Was posted by the Marines seeking a supplier of C-40s to be delivered in 2020. The USMC Skytrains were retired in 2017 and to prepare for the transition to new aircraft, personnel from Marine Transport Squadron One were assigned to operate Navy Clippers until the arrival of their own aircraft. The United States Air Force selected the C-40B , a military version of the 737-700 Boeing Business Jet , to replace

7569-445: Was the 737-800, with 4,991 commercial, 191 military, and 23 corporate, or a total of 5,205 aircraft. Boeing stopped assembling commercial 737NGs in 2019 and made the final deliveries in January 2020. The 737NG is superseded by the fourth generation 737 MAX , introduced in 2017. When regular Boeing customer United Airlines bought the more technologically advanced Airbus A320 with fly-by-wire controls, this prompted Boeing to update

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