10B Encoding

Monday, October 30th, 2006
by Lockergnome

No Related Post

The animated TECHTip Tutorial is available here.

Data transmission may be “coded” in different formats. In an optical network, a pulse of light will represented by a 1 (one) bit and no light will present a digital zero bit.

Symbol Encoding 4B/5B - four bits are represented by a five bit symbol - 16 of the possible 32 bit (symbols) are chosen in a way that any combination does not allow more than three zeros in a row. This yields symbols used for transmission of control information. 4B/5B is used in Fast Ethernet and FDDI [Fiber Distributed Data Interface]. 8B/10B coding is used in Gigabit Ethernet. 8B/6T coding is used in Fast Ethernet. 66B coding is used in ten Gigabit Ethernet.

[tags]symbol 4B/5B, 8B/10B, encoding, digital zero bit, data transmission[/tags]

3 Comments

dattatreya

April 16th, 2007
at 12:19am

please tell me how 4b to 5b conversion is done. please it is very urgent. u can send it to my e-mail ID

Thanking you

Cee

October 30th, 2007
at 8:31pm

I would think that you would use a “look up table” (LUT) that matched your 4-bit “nibble” to a 5-bit pattern for transmission, then send this out through a “serializer” for single-wire transmission.