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Cross section of a cat 5e cable. The Category 5e specification improves upon the Category 5 specification by further mitigating crosstalk. [9] The bandwidth (100 MHz) and physical construction are the same between the two, [10] and most Cat 5 cables actually happen to meet Cat 5e specifications even though they are not certified as such. [11]
Therefore, there was demand for an intermediate standard that could uplink the 2 Gbit/s and 4 Gbit/s speeds from wireless access points over existing Cat5e cable. The development of the 2.5GBASE-T and 5GBASE-T standards enabled wireless access points to reach their maximum speeds without being limited by the Ethernet uplink speeds over a single ...
Generally, layers are named by their specifications: [8] 10, 100, 1000, 10G, ... – the nominal, usable speed at the top of the physical layer (no suffix = megabit/s, G = gigabit/s), excluding line codes but including other physical layer overhead (preamble, SFD, IPG); some WAN PHYs (W) run at slightly reduced bitrates for compatibility reasons; encoded PHY sublayers usually run at higher ...
Direct attach SFP28-to-SFP28 copper cables in 1-, 2-, 3- and 5-meter lengths are available from several manufacturers, and optical transceiver manufacturers have announced 1310 nm "LR" optics intended for reach distances of 2 to 10 km over two strands of standard single-mode fiber, similar to existing 10GBASE-LR optics, as well as 850 nm "SR ...
2 1 1 CWDM makes it possible to have multiple parallel channels over 2 fibers; spectral bandwidth 11 nm; capable of 18 parallel channels: 1000BASE‑DWDM [24] [23] ITU-T G.694.1: current Fibre 1528 – 1565 nm: LC SFP: OSx: 40k – 120k: 2 1 1 DWDM makes it possible to have multiple parallel channels over 2 fibers; spectral bandwidth 0.2 nm;
The performance tests and their procedures have been defined in the ANSI/TIA-568.2 standard and the ISO/IEC 11801 standard. The TIA standard defines performance in categories (Cat 3, Cat 5e, Cat 6, Cat 6A, and Cat 8) and the ISO defines classes (Class C, D, E, EA, F and FA).
The 100 in the media type designation refers to the transmission speed of 100 Mbit/s, while the BASE refers to baseband signaling. The letter following the dash (T or F) refers to the physical medium that carries the signal (twisted pair or fiber, respectively), while the last character (X, 4, etc.) refers to the line code method used.
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