Search results
Results from the WOW.Com Content Network
The most popular variant, 1000BASE-T, is defined by the IEEE 802.3ab standard. It came into use in 1999, ... Toggle the table of contents. Gigabit Ethernet.
1000BASE-T uses all four pairs bi-directionally using hybrid circuits and cancellers. [16] Data is encoded using 4D-PAM5; four dimensions using pulse-amplitude modulation (PAM) with five voltages , −2 V, −1 V, 0 V, +1 V, and +2 V. [ 17 ] While +2 V to −2 V may appear at the pins of the line driver, the voltage on the cable is nominally +1 ...
10BASE5, 10BASE2, 10BASE-T, 100BASE-TX, 1000BASE-T, 10GBASE-R: Maximum distance 100 m (328 ft) over twisted pair, up to 100 km over optical fiber Mode of operation optical, differential (balanced), single-ended Maximum bit rate 1 Mbit/s to 800 Gbit/s: Voltage levels ± 2.5 V (over twisted pair) Common connector types 8P8C, LC, SC, ST, MPO
The mapping of the original bits to the symbol codes is not constant in time and has a fairly large period (appearing as a pseudo-random sequence). The final mapping from symbols to PAM-5 line modulation levels obeys the table on the right. 100BASE-T2 was not widely adopted but the technology developed for it is used in 1000BASE-T. [5]
1000BASE-X 1 Gbit/s (125 MB/s) Ethernet over optical fiber 802.3-1998 1998-06 (802.3aa) A revision of the base standard incorporating earlier amendments and errata 802.3ab: 1999-06 1000BASE-T 1 Gbit/s (125 MB/s) Ethernet over twisted pair 802.3ac: 1998-09 Max frame size extended to 1522 bytes (to allow "Q-tag").
The table below shows values for PC memory module types. These modules usually combine multiple chips on one circuit board. SIMM modules connect to the computer via an 8-bit- or 32-bit-wide interface. RIMM modules used by RDRAM are 16-bit- or 32-bit-wide. [49] DIMM modules connect to the computer via a 64-bit-wide interface.
The physical layer is responsible for electromagnetic compatibility including electromagnetic spectrum frequency ... FX, 1000BASE-T, 1000BASE ... table of contents ...
100BASE-TX, 1000BASE-T [18] Common for current LANs. Superseded by Cat 5e, but most Cat 5 cables meet Cat 5e standards. [18] Limited to 100 m between equipment. Cat 5e: UTP, [18] F/UTP, U/FTP [19] 100 MHz [18] 1000BASE-T, 2.5GBASE-T [18] Enhanced Cat 5. Common for current LANs. Same construction as Cat 5, but with better testing standards. [18]