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Fiber media converters are simple networking devices that make it possible to connect two dissimilar media types such as twisted pair with fiber optic cabling. They were introduced to the industry nearly two decades ago, and are important in interconnecting fiber optic cabling-based systems with existing copper-based, structured cabling systems. They are also used in MAN access and data transport services to enterprise customers.
Contents
1 Media conversion types
2 See also
3 References
4 External links
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Media conversion types
Fiber media converters support many different data communication protocols including Ethernet, Fast Ethernet, Gigabit Ethernet, T1/E1/J1, DS3/E3, as well as multiple cabling types such as coax, twisted pair, multi-mode and single-mode fiber optics. Media converter types range from small standalone devices and PC card converters to high port-density chassis systems that offer many advanced features for network management. Simple Network Management Protocol (SNMP) enables proactive management of link status, monitoring chassis environmental statistics and sending traps to network managers in the event of a fiber break or even link loss on the copper port.
Fiber media converters can connect different LAN media, modifying duplex and speed settings. Switching media converters can connect legacy 10Base-T network segments to more recent 100Base-TX or 100Base-FX Fast Ethernet infrastructure. For example, existing Half-Duplex hubs can be connected to 100Base-TX Fast Ethernet network segments over 100Base-FX fiber.
When expanding the reach of the LAN to span multiple locations, media converters are useful in connecting multiple LANs to form one large "campus area network" that spans over a limited geographic area. As premises networks are primarily copper-based, media converters can extend the reach of the LAN over single-mode fiber up to 130 kilometers with 1550nm optics.
Wavelength Division Multiplexing (WDM) technology in the LAN is especially beneficial in situations where fiber is in limited supply or expensive to provision. As well as conventional dual strand fiber converters, with separate receive and transmit ports, there are also single strand fiber converters, which can extend full-duplex data transmission up to 70 kilometers over one optical fiber.
Other benefits of media conversion include providing a gradual migration path from copper to fiber. Fiber connections can reduce electromagnetic interference.
See also
Computer Networking portal
Ethernet
Fast Ethernet
Gigabit Ethernet
Local Area Network
Metropolitan Area Network
Wide Area Network
Computer Network
Optical communication
Optical fiber connector: ST, SC and MTRJ
SFP transceiver
Network Management
Simple Network Management Protocol
References
Spurgeon, Charles E., Ethernet: The Definitive Guide, Sebastopol, CA: O'Reilly & Associates, 2000
Residential Network Cabling, New York, NY: R.R. Donnelley & Sons Company, 2002
The Switching Book, Xylan: An Alcatel Company, 1999
External links
The Metro Ethernet Forum
The Fiber Optic Association
FOA color code for connectors
"Fibers", article in RP Photonics' Encyclopedia of Laser Physics and Technology
How Fiber Optics are made In video
"Fiber Optic Tutorial" Educational site from Arc Electronics
Categories: Fiber optics | Telecommunications equipment(and so on)