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Many device interfaces or protocols (e.g., SATA, USB, SAS, PCIe) are used both inside many-device boxes, such as a PC, and one-device-boxes, such as a hard drive enclosure. Accordingly, this page lists both the internal ribbon and external communications cable standards together in one sortable table.
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]
Class C: Up to 16 MHz using Category 3 cable and connectors; Class D: Up to 100 MHz using Category 5e cable and connectors; Class E: Up to 250 MHz using Category 6 cable and connectors; Class E A: Up to 500 MHz using category 6A cable and connectors (Amendments 1 and 2 to ISO/IEC 11801, 2nd Ed.) Class F: Up to 600 MHz using Category 7 cable and ...
10BASE-T and 100BASE-TX require only two pairs (pins 1–2, 3–6) to operate. Since common Category 5 cable has four pairs, it is possible to use the spare pairs (pins 4–5, 7–8) in 10- and 100-Mbit/s configurations for other purposes.
4B5B MLT-3 coded signaling, Category 5 cable using two twisted pairs. The specifications are largely borrowed from FDDI's TP-PMD. [12] As of 2018, still very popular. 100BASE-T4: 802.3u-1995 (23) 8P8C (IEC 60603-7) 8B6T PAM-3 coded signaling, Category 3 cable (as used for 10BASE-T installations) using four twisted pairs. Limited to half-duplex.
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 ...