Choosing the Right Optical Transceiver for Your Network
In the world of networking, selecting the right optical transceiver is vital to ensure seamless and efficient data transmission. When it comes to Gigabit Ethernet connections, four commonly used transceivers are 1000BASE-SX, 1000BASE-LX, 1000BASE-EX, and 1000BASE-ZX. These transceivers provide distinct features and are suitable for various network requirements.
What is 1000BASE-LX?
1000BASE-LX is a Gigabit Ethernet optical transceiver suitable for both short-range and long-range data transmission. It operates over both single-mode and multimode fiber optic cables and utilizes a long-wavelength laser (1310nm) for communication. The abbreviation "LX" indicates the capability of long-distance transmission.
In terms of specifications, while some industry vendors offer extended distances of up to 20 kilometres, this is not officially defined in the standard. 1000BASE-LX generally supports a maximum transmission distance of 10 kilometres when used with single mode fiber.
When 1000BASE-LX is utilized with multimode fiber, it can achieve a maximum distance of 550 meters. However, it is important to note that link distances beyond 300 meters may require the use of a specific conditioning patch cord.
As 1000BASE-LX is considered very cost-effective and has the ability to cover extended distances, the standard has become highly popular, especially in enterprise networks and data centres.
What is 1000BASE-EX?
1000BASE-EX is a Gigabit Ethernet optical transceiver designed for extended-range data transmission. It operates over single-mode fiber optic cables and utilizes a long-wavelength laser (1310 nm) for communication. Although it is not an official standard for transmitting Gigabit Ethernet signals over fiber optic cables, the abbreviation "EX" signifies its ability to extend reach, supporting a remarkable distance of up to 40 kilometres over single mode fiber.
Similar to 1000BASE-LX, 1000BASE-EX operates at the same long wavelength of 1310nm, facilitating long-distance transmission. However, what distinguishes 1000BASE-EX is its enhanced power budget, enabling the achievement of even more substantial distances. 1000BASE-EX is also referred to as 1000BASE-LH by manufacturers, with the “LH” abbreviation meaning ‘Long Haul’.
It's important to note that 1000BASE-EX typically involves higher costs due to more specialized optical components, resulting in a higher price compared to 1000BASE-SX and 1000BASE-LX alternatives.
What is 1000BASE-ZX?
1000BASE-ZX is a Gigabit Ethernet optical transceiver designed for long-range data transmission. It operates over single-mode fiber optic cables and utilizes a long-wavelength laser (1550 nm) for communication.
Similarly, to 1000BASE-EX, 1000BASE-ZX is not an official standard but is a widely adopted industry term for long-distance Gigabit Ethernet transmission spanning 70Km. Transceiver vendors also will often provide versions of 1000BASE-ZX with an extended reach of 80km (50 miles), surpassing the standard specifications.
To further extend the capabilities of 1000BASE-ZX, certain manufacturers offer 1000BASE-EZX or 1000BASE-ZX120, enabling transmission distances of up to 120 kilometres (75 miles) using single-mode fiber. The 1000BASE-EZX transceivers are characterized by their high transmitter power and receiver sensitivity, however, to prevent bit errors caused by overload, it is essential to utilize a suitable fiber attenuator.
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