10BASE5 was the first commercially available variant of Ethernet. 10BASE5 uses a stiff coaxial cable up to 500 metres in length. Up to 100 stations can be connected to the cable using vampire taps and share a single collision domain with 10 Mbit/s of bandwidth shared among them; the system is difficult to maintain. 10BASE5 was superseded by much cheaper and more convenient alternatives: first by 10BASE2 based on a thinner coaxial cable, once Ethernet over twisted pair was developed, by 10BASE-T and its successors 100BASE-TX and 1000BASE-T. As of 2003, IEEE 802.3 has deprecated this standard for new installations. The name 10BASE5 is derived from several characteristics of the physical medium; the 10 refers to its transmission speed of 10 Mbit/s. The BASE is short for baseband signalling, the 5 stands for the maximum segment length of 500 meters. For its physical layer 10BASE5 uses cable similar to RG-8/U coaxial cable but with extra braided shielding; this is a stiff, 0.375-inch diameter cable with an impedance of 50 ohms, a solid center conductor, a foam insulating filler, a shielding braid, an outer jacket.
The outer jacket is yellow-to-orange fluorinated ethylene propylene so it is called "yellow cable", "orange hose", or sometimes humorously "frozen yellow garden hose". 10BASE5 coaxial cables had a maximum length of 500 metres. Up to 100 nodes could be connected to a 10BASE5 segment. Transceiver nodes can be connected to cable segments with N connectors, or via a vampire tap, which allows new nodes to be added while existing connections are live. A vampire tap clamps onto the cable, a hole is drilled through the outer shielding, a spike is forced to pierce and contact the inner conductor while other spikes bite into the outer braided shield. Care is required to keep the outer shield from touching the spike. Transceivers should be installed only at precise 2.5-metre intervals. This distance was chosen to not correspond to the wavelength of the signal; these suitable points are marked on the cable with black bands. The cable is required to be one continuous run; as is the case with most other high-speed buses, segments must be terminated at each end.
For coaxial-cable-based Ethernet, each end of the cable has a 50 ohm resistor attached. This resistor is built into a male N connector and attached to the end of the cable just past the last device. With termination missing, or if there is a break in the cable, the signal on the bus will be reflected, rather than dissipated when it reached the end; this reflected signal is indistinguishable from a collision, prevents communication. Adding new stations to network is complicated by the need to pierce the cable; the cable is difficult to bend around corners. One improper connection can take down the whole network and finding the source of the trouble is difficult. Attachment Unit Interface EAD-socket This article is based on material taken from the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later
John Jacob Crouthamel is a former American football player and college athletics administrator. He graduated with a B. A. in history from Dartmouth College in 1960. He was the first football player to sign with the Dallas Cowboys but was traded to the Boston Patriots in 1960, he was head football coach at Dartmouth from 1971 to 1977 and became athletic director at Syracuse University in 1978. Crouthamel played a key role in the formation of the Big East Conference in 1979 and served on the NCAA Men's Basketball Committee. While Crouthamel was athletic director at Syracuse, his teams won ten national championships, he retired from Syracuse University on June 30, 2005. He received the John L. Toner Award in 1999. In 2000, Jake Crouthamel was named the NACDA Division IA Northeast Region Athletics Director of the Year and received the Chancellor's Citation for Excellence in 2002. In January, 2009 Crothamel was an honoree at the biennial Ivy League Football Players Association dinner which recognizes a former player from each of the eight Ivy schools who has become a leader in his chosen field.
Career statistics and player information from Pro-Football-Reference
Rubyvale is a town in the Central Highlands Region, Australia. In the 2016 census, Rubyvale had a population of 640 people, it is one of three towns within The Gemfields. Rubyvale is 61 kilometres west of Emerald. Situated in a locality called The Gemfields, sapphires are mined extensively in the area. At the 2006 census, Rubyvale had a population of 510. Rubyvale is home to a small library, a convenience store/news agents, post office and take-away bottle shop, as well as a variety of accommodation and fossicking areas; some popular places to go fossicking are Bobby Dazzler and Pats Gems. The Central Highlands Regional Council operate a public library at Rubyvale; the area can get up to 40'C during summer, can reach 0 °C in winter. Rubyvale has a number of heritage-listed sites, including: Argyll: Tomahawk Creek Huts University of Queensland: Queensland Places: Rubyvale Map and facilities list A Gemfields home page