Bell 212A

Definition of Bell 212A

Bell 212A is a communication standard for modems, also known as ITU-T V.22. It enables data transmission rates of up to 1,200 bits per second over analog phone lines. This standard was popular during the 1980s and laid the groundwork for subsequent modem communication protocols.


The phonetic pronunciation of “Bell 212A” is: /bɛl tuː wʌn tuː eɪ/. Breaking it down by each element:- Bell: /bɛl/- 2: /tuː/- 1: /wʌn/- 2: /tuː/- A: /eɪ/

Key Takeaways

  1. Bell 212A is a twin-engine, medium-lift helicopter designed for various utility and multi-purpose operations such as transport, search and rescue, and emergency medical services.
  2. It is powered by two Pratt & Whitney PT6T-3 Turbo Twin Pac engines, which provide increased reliability and performance, making it suitable for operations in diverse environments and challenging weather conditions.
  3. The helicopter has a spacious and versatile cabin that can accommodate up to 14 passengers or various cargo configurations, offering flexibility in mission types and load carrying capabilities.

Importance of Bell 212A

The Bell 212A is an important technology term as it refers to the standard for modern modem communication, which significantly influenced the development of data transfer and telecommunication systems in the digital age.

It was introduced in the 1970s by AT&T’s Bell Laboratories, and it became the first widely adopted modem standard for transmitting digital data over voice-grade telephone lines at a rate of 1,200 bits per second (bps). By enabling efficient and reliable digital communication over existing telephone networks, the Bell 212A played a crucial role in the expansion of computer networks and the growth of early internet services, thereby shaping today’s connected world.


The Bell 212A is a crucial telecommunications technology, primarily designed to facilitate reliable and efficient communication between devices, and occupies a significant role within the realm of signal transmission. This technology primarily revolves around modems, the devices that modulate and demodulate signals, ensuring seamless transmission of information over communication channels such as telephone lines.

Bell 212A, as a standard, was specifically developed for the purpose of transmitting data at a speed of 1200 bits per second (bps), which represented a significant leap forward in terms of the data rates of its predecessors. This capability is essential, as it enables the transfer of larger data packets in a shorter time frame, enhancing various facets of communication and data sharing.

The Bell 212A’s primary usage can be observed in facilitating the transfer of digital data over analog phone lines. Its utilization within the field of networking has substantial potential to optimize access to online services and communication platforms.

For instance, the Bell 212A technology was particularly popular among early internet users, as it enabled them to establish a connection to their Internet Service Providers (ISPs) through dial-up modem technology, which incorporated the Bell 212A standard. Now, despite the advent of more advanced and sophisticated telecommunications technologies, the Bell 212A’s legacy lives on in the world of telecommunications infrastructure, providing a foundation upon which many subsequent innovations have been built and ensuring its continued influence on the field of modem technology.

Examples of Bell 212A

The Bell 212A (often simply called Bell 212) is a two-bladed, twin-engined, medium helicopter manufactured by Bell Helicopter. It’s a popular helicopter choice for various roles due to its reliability, versatility, and performance. Here are three real-world examples of how the Bell 212A has been utilized:

Mountain Rescue Operations: The Bell 212 is widely used for search and rescue missions, particularly in mountainous regions. In 2012, it proved instrumental in the successful rescue of a researcher from the High-Altitude Medical Research Center in the Austrian Alps. The stable hovering characteristic of the Bell 212, coupled with its payload capacity, enables it to service locations that are hard to reach for other types of helicopters.

Oil and Gas Industry Support: In the offshore oil and gas industry, the Bell 212A has been used for crew transport, equipment transfer, and other essential support functions. The helicopter can carry a full crew and their equipment in various weather conditions, making it a reliable means of transportation in this critical industry. Petroleum Helicopters Inc. (PHI) and Era Helicopters, two major helicopter transportation providers, have used the Bell 212 in their fleets to service oil and gas infrastructure around the world.

Airborne Firefighting: Another application for the Bell 212A helicopter is in the field of aviation firefighting. Equipped with external water tanks and pumps, these helicopters can collect water from a nearby source and drop it onto a fire-break area or directly onto a fire without needing to land. The flexibility and precision of the Bell 212’s hovering capabilities make it an excellent tool for battling wildfires. CAL FIRE, California’s firefighting agency, has employed the Bell 212 in their Helitack program, a severe-fire rapid response system.

Bell 212A FAQ

What is the Bell 212A?

The Bell 212A is a medium-sized, twin-engine helicopter designed and manufactured by Bell Helicopter. It is typically used for a variety of purposes, including civil, commercial, and military operations.

What are the main features of the Bell 212A?

The Bell 212A helicopter is known for its exceptional reliability, strong lifting capacity, and versatile mission capabilities. It is designed with a spacious and comfortable cabin, making it suitable for transporting passengers and cargo. It also has a range of advanced avionics and can be configured for different mission requirements.

What are the primary uses of the Bell 212A?

The Bell 212A is versatile and can be used for various applications, such as transporting cargo and passengers, search and rescue missions, offshore operations, firefighting, medical evacuations, and military operations. It can also be customized with additional equipment to suit the specific needs of its operator.

What is the capacity of the Bell 212A?

The typical seating configuration for the Bell 212A consists of 14 passengers plus 2 crew members. However, the cabin can be reconfigured to accommodate up to 15 passengers, depending on the specific needs of its operator.

What is the range and speed of the Bell 212A?

The Bell 212A has a maximum range of approximately 230 miles (370 km) and can reach a top speed of around 140 mph (225 km/h). These figures may vary depending on factors such as the helicopter’s configuration, payload, and environmental conditions.

Related Technology Terms

  • Bell 212A modem
  • 1200 bits per second (bps)
  • Half-duplex transmission
  • Asynchronous communication
  • Frequency shift keying (FSK)

Sources for More Information


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