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newyorkcablesblog · 3 years

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5 Tips to Choose the Best Ethernet Cables

Which of these Cat5e Ethernet Cable, Cat6 Ethernet Cable, or Cat6a Ethernet Cable is better for your needs? If you are a beginner looking to buy ethernet cables for the workplace, you will quickly get lost in these complicated terminologies. But stick with us because we've got your back.

What is the purpose of Ethernet cables?

Ethernet cables are used to link PCs or laptops to networks, modems, or routers. The aforementioned ethernet cables are made up of four twisted pairs of eight solid core copper wires that transmit data through RJ-45 connectors.

While you can transmit data using just two pairs of ethernet cable, optimum reliability and superior results can only be obtained by using all four. Wired networks [networks comprised of ethernet cables] outperform wireless networks in terms of reliability and protection. Cat5e Ethernet Cable, Cat6 Ethernet Cable, and Cat6a Ethernet Cable are the most common and in-demand cables these days. Let's look at each specification separately so you can make an educated decision when purchasing ethernet cables.

Ethernet Cat5e Cable

Cat5e Ethernet Cable is designed to provide data transfer speeds of up to 1Gbps (Gigabits per second) over distances of up to 100 metres. It has a bandwidth range of 350 MHz.

This cable complies with both EIA and TIA requirements. This cable is made up of 8 pure copper wires twisted together in 4 shielded pairs, resulting in less crosstalk and EMIs (electromagnetic interferences).

The four twisted pairs can be shielded or unshielded. The cable would be labelled UTP if it is unshielded. If the cable is protected, the acronym STP will appear on it.

All three forms have the same data transfer speed and bandwidth capacity. The main aspect that separates them is the jacket content.

Plenum cable jackets are available in CMP ratings. The fire-retardant plenum-rated cables are useful in the event of a fire because they prevent it from spreading to other floors. They are also immune to UV rays. Cat5e plenum cable can be used in place of Cat5e riser cable due to its increased longevity.

Ethernet Cat6 Cable

Cat6 Ethernet Cable raises the bar in terms of data transfer speed and bandwidth capacity. These cables can transmit data at a staggering 10 Gbps (Gigabits per second) over a distance of 165 feet or 50 metres. When the length is increased to 330 feet, the speed drops to 1 Gbps.

It, too, has eight copper connectors twisted into four pairs and an RJ-45 connector. Cat6 Ethernet cables are also used in UTP or STP configurations. CMP-rated jackets are used on plenum cables. It means they are made of high-quality materials and are suitable for use in both residential and commercial settings. CMP-rated jackets provide superior resistance to fire progression. Underwater has also UL910 accredited these cables, which meets rigorous industry requirements.

Ethernet Cable Cat6a

Cat6a Ethernet Cable's "a" stands for "augmented." The Cat6a ethernet cable has 750MHz bandwidth and can accommodate a data transfer rate of 10 Gbps (Gigabits per second) over a distance of 100 metres.

This cable is suitable for use in 100VG-AnyLAN (IEEE802.12), 10BASE-T, 100BASE-TX, and 750 MHz Broadband Video Voice applications, among many others.

Cat6a cable is an excellent option if you need high bandwidth capability, high performance, low crosstalk, and high data transfer speeds.

5 guidelines for selecting the right ethernet cable for your office

Here are the top five tips for selecting the right ethernet cable for your office:

Examine Your Internet Connection Speed

When choosing an internet cable for your workplace, the first thing you should consider is your office's internet speed. If you need up to 100Mpbs, Cat5e ethernet cable is the best choice.

The cable's length

The length of the ethernet cable is the second factor that determines your decision; the longer the cable, the slower the signal speed, and the shorter the cable length, the faster the signal speed.

Installation Site

The location of installation is also important since certain cables are only permitted in certain areas. For example, in your office's plenum spaces, you'll need a plenum-rated cable; in riser spaces, you can use both plenum-rated and riser-rated cables; and for outdoor installation, PVC cables are the best.

Ethernet cables are made from either pure copper or copper-clad aluminium. We suggest that you always use pure copper ethernet cables for the best experience, including reduced crosstalk and high signal power.

The pure copper cable is labelled “TIA 568-C22,” while the copper-clad aluminium cable is labelled “CCA.” Although the latter is less expensive, the former provides the best value for money and can last much longer. STP or UTP STP ethernet cables provide an additional layer of security in the form of a metal shield on the copper tape. This shield significantly eliminates crosstalk and electromagnetic interference, resulting in faster data transmission.

UTP cables can be used in situations where EMI and crosstalk are not a problem, but STP cables should be used if there are strong magnetic shields all around. Again, STP cables are quite pricey, but they have the ultimate experience.

#Cat6EthernetCable #Cat6aEthernetCable #Cat5eEthernetCable #BuyEthernetCables

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etekcables · 5 years

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Cat6 Plenum Solid Copper 1000 Feet UTP Cable: This is a category 6 high-performance plenum cable with 100% pure solid copper conductors. And a plenum rated outer jacket is a yellow color. This is Cat6 plenum 1000ft solid copper cable and it is tested for its superior specifications. It confirms to the highest market standards and agency codes. It is EIA/TIA verified, RoHS compliant and UL listed. Therefore, it is ideal for applications like 10BASE-T, 100BASE-TX Fast Ethernet, 1000BASE-T(IEEE802.3), 100VG-AnyLAN (IEEE802.12), 550 MHz Broadband Video Voice, T1, ISDN 155/622 Mbps ATM PoE (Power over Ethernet). So that even people on budgets can enjoy their high performance and high transmission quality. It is a cable that is intended to provide you with a high data transfer rate, exceptional attenuation, high bandwidth frequencies, high data integrity. And low bit error rate, ability to eliminate cross-talk and other electromagnetic interferences and so much more. Please Visit Our Website https://www.etekcables.com/

#cat6 #cat6e #cat6Plenum #cat5

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meetcoogle · 5 years

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Google Play: http://tinyurl.com/y3hvy4bm This book is useful for IGNOU MCA students. A perusal of past questions papers gives an idea of the type of questions asked, the paper pattern and so on, it is for this benefit, we provide these IGNOU MCS-042: Data Communication and Networks Notes. Students are advised to refer these solutions in conjunction with their reference books. It will help you to improve your exam preparations. This book covers evolution of computer networks, computer telephony. Data communications – advantages of digital communication, transmission media, and fundament ales of digital communications, transmission media, modulation techniques and modems. The OSI seven layer network model, LAN technologies – protocols and standards, LAN hardware, TCP/IP and the Internet, Internet Architecture, Internet protocol and datagram. Routing protocols, UDP, Internet standard services, DNS. Networking Technologies, ISDN, Cable Modem System, DSL, SMDS, Frame relay, fast Ethernet, 100VG-anyLAN and Gigabit Ethernet, FDDI and CDDI, Asynchronous Transfer, SONET, DWDM Switching and Virtual LAN, Non-ATM Virtual LANs, IEEE 802.1Q VLAN standard, Network Performance, Analytical approaches, simulation, traffic monitoring. Network Management – SNMP, RMON and RMNv2, TMN, Directory services and network management. Issues related to network reliability and security, SSL and VPN, Introduction only to firewalls and Kerberos, Cyber Laws. Published by MeetCoogle #MeetCoogle #erotica #romance #bdsm #bookish #booksforchildren #readingisfun #writersofinstagram #love #booksforkids #kidsbook #instabook #christian #jesus #childrenreading #whatyouneed #needtoread #needtolisten #talesforchildren #bookclub #read #kindlebooks #booksofinstagram #jesuschrist #digitallearning #freebooks #authorsofinstagram #entrepreneurmindset #bookrecommendation #authors #deborahhbateman #biblestudy #writers #dailybiblereading

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newyorkcables-blog · 5 years

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Understanding the Benefits of Cat6 Plenum Technology

Learning about networking cables can be overwhelming sometimes. If someone is just getting into a cabling business, it can be very tricky to understand different categories of cables and how does each of them work. In this article, we’ll talk about Cat6 Plenum technology.

Cat6 plenum is a category 6 cable. A cat is a short form of category. This technology is very suitable for high-performance applications. It is recommended for applications like 10BASE-T, 100BASE-TX Fast Ethernet, 1000BASE-T (IEEE802.3), 100VG-AnyLAN (IEEE802.12), 550mhz broadband video voice, T1, ISDN 155/ 622 Mbps, and ATM PoE (Power over Ethernet). The data transfer rate of this cable is 550 MHz and data transfer speed are up to 10Gbps.

#cat6 #cat6 plenum #cat6 cable #cat6 plenum cable #cat6 cable plenum #cat6 ethernet cable #ethernet cable #ethernet cables

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milujemeivt · 6 years

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POČÍTAČOVÁ SÍŤ, TOPOLOGIE, DRUHY ZAPOJENÍ

http://slideplayer.cz/slide/2693373/ < super prezentace na druhy zapojení sítí

Počítačová síť

spojení dvou a více počítačů tak, aby mohly navzájem sdílet své prostředky (buď hardwarové nebo softwarové)

před nástupem počítačových sítí: každý počítač, ze kterého se chtělo tisknout, musel mít vlastní tiskárnu

případně se musel dokument k tisku nahrát na disketu a odnést k počítači s tiskárnou a vytisknout

pomocí sítí je možné sjednotit používání aplikací, jako například textového procesoru, a zajistit tak, že všichni pracovníci zapojení do sítě budou používat stejnou aplikaci a její verzi

pokud jsme připojeni k síti, můžeme sdílet:

· data

· zprávy

· grafiku

· tiskárny

· faxové přístroje

· modemy

· další hardwarové zdroje

Účel sítě

společnosti si instalují počítačové sítě především proto, aby mohli sdílet zdroje a aby umožnili přímou komunikaci

zdroje: zahrnují data, aplikace a periferní zařízení

periferní zařízení: př: externí disketová mechanika, tiskárna, modem

přímá komunikace: zahrnuje posílání zpráv, odpovídání na zprávy nebo e-mail

Druhy sítí

1) LAN = lokální síť

Local Area Network (př: síť na jednom podlaží firmy)

většina moderních sítí: podporuje širokou škálu PC a jiných zařízení

každé zařízení: musí používat vlastní fyzické protokoly a protokoly datového spojení pro konkrétní síť

všechna zařízení, která chtějí komunikovat se všemi ostatními v síti, musí používat stejný komunikační protokol

jednotlivé sítě LAN

prostorově omezeny (oddělení, budova úřadů)

mohou být ale také propojeny do větších sítí

podobné sítě LAN: propojují se pomocí mostů (bridge) = body přenosu mězi sítěmi

rozdílné sítě LAN: spojují se ústřednami (gateways)

gateways - přenášejí data a zároveň je konvertují podle protokolů používaných sítí příjemce

doba vysílání tv vyšší než doba šíření signálu ts po přenosovém médiu

- tv > ts

2) MAN = metropolitní síť

veřená síť pracující vysokou rychlostí schopná přenášet data na vzdálenost až 80 km

většinou podporuje data i hlas

je menší než WAN ale větší než LAN

pro klasifikaci: platí přibližně to samé co v síti LAN ( viz.LAN)

má přibližně stejnou dobu vysílání jako šíření signálu tv = ts

3) WAN = rozlehlá síť

Wide Area Network

s růstem geografického dosahu sítí připojováním uživatelů v různých městech nebo státech přerůstá síť LAN a MAN do této sítě

počet uživatelů: od deseti do několik tisíc

doba vysílání je menší než doba šíření tv < ts

4) PAN = osobní síť - Personal Area Network – bezdrátové připojení technických prostředků (notebook, mobilní telefon, tiskárna, …)

Topologie sítí

všechny návrhy sítě vycházejí ze tří základních topologií:

sběrnicová topologie – počítače jsou zapojeny v řadě za sebou podél jediného kabelu (segmentu)

hvězdicová topologie – počítače jsou zapojeny ke kabelovým segmentům, které vycházejí z jediného bodu neboli rozbočovače

prstencová topologie – počítače jsou zapojeny ke kabelu, který tvoří smyčku

zatímco tyto tři základní topologie jsou samy o sobě jednoduché, v praxi používané varianty často kombinují vlastnosti více než jedné topologie a mohou být složité

další možnosti topologie sítě:

neomezená topologie

varianty hlavních topologií

1) Sběrnicová topologie

- známa jako lineární sběrnice

- nejjednodušší a nejčastější způsob zapojení počítačů do sítě

- skládá se z jediného kabelu nazývaného hlavní kabel (také páteř nebo segment)

- kabel - v jedné řadě propojuje všechny počítače v síti

Komunikace přes sběrnicovou topologii

- počítače komunikují tak, že adresují data konkrétnímu počítači a posílají tato data po kabelu ve formě elektrických signálů

- data v síti ve formě elektrických signálů jsou posílána všem počítačům v síti

- informaci přijme ale pouze ten počítač, jehož adresa odpovídá adrese zakódované v počátečním signálu

- v daný okamžik: zprávy může odesílat vždy pouze jeden počítač

- výkon sítě závisí na počtu připojených ke sběrnici

- velikost zpomalení závisí také na:

· vzdálenosti mezi počítači

· používaných typů kabelu

· používaných druhů aplikací

· počtu přenosů dat počítači

· možností hardwarového vybavení počítačů

- pokud jeden počítač selže, neovlivní to zbytek sítě

- terminátor – umístěn na obou koncích přenosového kabelu

- pohlcuje volné signály (aby se nevracely zpět)

- pohlcování vyčistí kabel tak, aby mohly data posílat i další počítače

- v případě, že je kabel fyzicky rozříznut na dvě části nebo se jeden konec odpojí, dojde k přerušení kabelu → vracení signálu

- následkem toho se přeruší činnost v síti → síť "spadla"

Rozšíření sítě

- kabely ve je možné prodlužovat jedním ze dvou následujících způsobů:

· pomocí dílu zvaného I-konektor je možné spojit dva kabely a získat tak delší

konektory I - zeslabují signál → měli by se používat pouze v omezeném počtu

- použití mnoha konektorů může zabránit správnému příjmu signálu!

proto je lepší koupit jeden delší kabel

· pro spojení dvou kabelů je možné použít opakovač – signál před odesláním zesílí

- lepší než konektor, nebo 1

delší kabel

- umožňuje přenášení a příjem

signálu na ještě větší vzdálen.

- výhody: ekonomic. využití kabelu, média nejsou drahá a snadno se s nimi pracuje

jednoduchá, spolehlivá. Snadno se rozšiřuje

- nevýhody: při velkém provozu – zpomalení, Porušení kabelu může ovlivnit mnoho

uživatelů

2) Hvězdicová topologie

- počítače propojeny pomocí kabelových segmentů k centrálnímu prvku sítě, nazývanému rozbočovač (HUB)

- signály se přenáší z vysílacího počítače přes rozbočovače do všech počítačů v síti

- pochází z počátků používání výpočetní techniky (počítače připojeny k centrálnímu počítači mainframe)

- mezi každými dvěma stanicemi musí existovat jen jedna cesta!

- nabízí centralizované zdroje a správu

- vyžaduje při instalaci velké sítě velké množství kabelů

- selhání HUBu způsobí "spadnutí" sítě u stanic k němu připojených

- proto vhodné ho chránit před výpadkem el. proudu zdrojem UPS

- pokud selže 1 počítač nebo kabel → pouze tento nefunkční počítač nebude moci

posílat nebo přijímat data ze sítě

→ bývající část sítě bude fungovat normálně

- výhody: snadná modifikace a přidávání nových počítačů

centrální monitorování a správa

selhání jednoho počítače neovlivní zbytek sítě

- nevýhody: pokud selže centrální prvek, selže celá síť

3) Prstencová topografie

- propojuje počítače pomocí kabelu v jediném okruhu

- neexistují žádné zakončené konce

- signál postupuje po smyčce v jednom směru a prochází všemi počítači

- narozdíl od pasivní sběrnicové topologie: funguje každý počítač jako opakovač (zesiluje signál a posílá ho do dalšího počítače)

- selhání jednoho počítače může mít dopad na celou síť → signál prochází všemi PC

Předávání známky

- jeden způsob přenosu dat po kruhu

- známka (token) se posílá z jednoho počítače na druhý, dokud se nedostane do počítače, který má data k odeslání

- vysílající počítač známku pozmění, přiřadí datům elektronickou adresu a pošle ji dál po okruhu

- data procházejí všemi počítači, dokud nenaleznou počítač s adresou, která odpovídá jim přiřazené adrese

- přijímací počítač vrátí vysílacímu počítači zprávu, že data byla přijata

- po ověření vytvoří vysílací počítač novou známku a uvolní ji do sítě

- známka proběhne kruhem o průměru 200m asi 10 000krát za sekundu (rychlost světla)

- výhody: rovnocenný přístup pro všechny počítače

yvážený výkon i při velkém počtu uživatelů

- něvýhody: selhání jednoho počítače může mít dopad na zbytek sítě

problémy se obtížně izolují

rekonfigurace sítě přeruší její provoz

4) Neomezená topologie

- segmenty sítě jsou zapojeny libovolně mezi sebou

- nejedná se o samostatné počítače, ale o navzájem propojené sítě

- příklad: pro připojení do Internetu

Typy sítí

sítě se dají rodělit na 5 základních skupin, podle použité technologie:

ArcNet - Attached Resource Computer Network

možňuje propojit širokou škálu osobních počítačů a pracovních stanic

maximální počet je 255

fyzické zapojení je hvězda, ale logická komunikace je kruh

Token-ring

- síť s kruhovou topologií

- přístupová metoda založená na předávání známky

pracuje rychlostí 4 Mbps nebo 16 Mbps

používá hvězdicové skupiny až 8 prac stanic napojených na kabelový koncentrátor (MAU) který je napojen na hlavní kruh

maximální počet stanic u této sítě je až 260 na jeden koncentrátor

100VG-AnyLAN

- maximální průměr sítě je 7,7 km

- maximální počet stanic není omezen, záleží na počtu HUBů

- médiem: kroucená dvoulinka a optický kabel

- kdyby toto řešení sítí přišlo dříve, stalo by se možná

rozšířenější než Ethernet → zřejmě lepší a výhodnější

FDDI - Fiber Distributed Data Interface (vznik: 1986)

- rychlost přenosu: 100 Mbps

- používá dvojitou protisměrnou kruhovou topologii

- jeden kruh = primární, druhý = sekundární

- podporujicí až 500 počítačů

- provoz většinou probíhá pouze v primárním kruhu

- pokud dojde k selhání prim. prstence → data probíhají v 2. kruhu (opačně)

Ethernet

přes 80 % zasíťovaných počítačů je připojeno pomocí Ethernetu

vyvinut firmou Xerox v roce 1976

používá přístupovou metodu CSMA/CD, má svůj typ rámců

původně: používal sběrnicovou topologii

umožňoval připojit na hlavní segmenty až 1024 počítačů a pracovních stanic

jednotlivé stanice: propojeny pomocí koaxiálního kabelu, optickým kabelem či kroucenou dvoulinkou

dnes: rozdělujeme několik typů Ethernetu jako 10BASE5, 10BASE2,...

IP adresa

jestliže chceme v rámci sítě navázat spojení s jiným počít., musíme znát jeho IP adresu

IP adresu musí mít každý počítač jinou

jeden počítač může mít i víc IP adres → pokud má víc síťových adaptérů

přiděluje je mezinárodní autorita pověřená správou IP adres

má velikost 4 byte = 32 bitů (každý byte: hodnoty 0-255

nejčastěji se zapisuje v desítkové soustavě, jednotlivé byte jsou odděleny tečkou

skládá se ze 2 částí: net-ID (adresa sítě) a host-ID (adresa počítače)

třídy: A, B a C

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wwwbastrophomenhealth · 2 years

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IC1078E5OR - Cat5 Jck ORANGE

IC1078E5OR – Cat5 Jck ORANGE

– Cortelco category 5E modular connector- 8 Conductor- 8 Position- Designed for high-speed network applications- Includes a one-piece termination cap that reduces installation time by allowing simultaneous 4-pair termination- For use with applications: 100Base-T, ATM-155 Mbps, 100Base-TX, 100VG-anyLAN, 10Base-T, 4/16 Mbps Token Ring, TP-PMD (CDDI)- Compatible with all ICC faceplates, inserts,…

View On WordPress

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dippedanddripped · 7 years

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A chance encounter with a homeless woman sent apparel manufacturer Jodie Dolan on a path to connecting her 13-year-old manufacturing business with doing social good. Dolan is the president and founder of the Dolan Group, a company with several brands—including Dolan, 34°N118°W and Guest Editor—that sell atAnthropologie, Nordstrom, Shopbop and boutique retailers. Her latest project is The Laundry Truck LA, a 501(c)(3) nonprofit she founded this month.

The truck will be outfitted with washing machines and dryers as well as a supply of donated clothing and shoes. The Laundry Truck LA will work in tandem with another nonprofit, the Shower of Hope, a mobile shower truck that began operations earlier this year. “We realized we could directly serve people who are invisible yet exist in the very heart of the fashion community in LA,” Dolan said. “We will help bring some much-needed services to the community and help restore dignity to our neighbors.”

Dolan has begun raising funds for the nonprofit with the goal of purchasing a mobile laundry trailer and funding operations for one year.

The goal is to raise $150,000, which will include $75,000 for the laundry truck and $75,000 for operations for the first year. As part of their research, Dolan and her team have found several companies in the U.S. that can build the truck. They’re currently reviewing several proposals.

She plans to have the laundry truck running by early 2018. “My hope is we can encourage the fashion community as a whole to also jump in and get involved so we can all take better care of our community,” Dolan said.

When Dolan first approached attorney Jeffrey H. Kapor, a partner with the Los Angeles law firm Buchalter, with the idea, the longtime apparel attorney thought it was a unique idea with a direct connection to the apparel industry.

“The idea of putting together a truck that has washers and dryers on it that gives people the opportunity to clean their clothes is just a terrific idea,” he said. “And here this is in our backyard. It touches our community and the businesspeople [we] work with. It just seems like why didn’t anybody think of this before?”

Mimi Haddon leads a natural-dye class at Dolan headquarters.

Kapor’s firm is working pro bono to set up a nonprofit corporation and file all the paperwork with the California Secretary of State and the Internal Revenue Service. A board of directors has been named. The next step is to set up an advisory group and begin fund-raising.

“What a unique opportunity for people in the apparel industry to be able to give small dollar amounts to try to help the neighborhood,” Kapor said. “We’ll raise some money for the first truck. If the fund-raising goes well, perhaps we can get another truck. There are a lot of homeless people and there are a lot of clothes that need to be washed. Maybe this will become a model for other communities.” Dolan’s accounting firm, Cohn Handler, is also working pro bono on the effort.

“We’re facing a crisis right now,” said Mel Tillekeratne, founder of the Monday Night Mission and the Shower of Hope. “We have officially 58,000 in this county who are homeless. Unofficially, we think it’s upwards of 120,000 because there are so many people who are sleeping in their cars that are not counted in the homeless census. This is the crisis of our time. We can get involved now, when we can fix this. We have to make sure our generation is the one that doesn’t let it pass over to the next one.” Tillekeratne founded the Monday Night Mission nearly seven years ago and launched the Shower of Hope in March. Living without access to showers or clean clothing can be very isolating, he said.

“[If] I’m in the gym and I’ve got all my sweat on me, when I get into the elevator I’m very conscious of myself and I try not to talk to people. It’s embarrassing,” Tillekeratne said. “For a person that doesn’t have regular access to showers, this is their everyday life. And they isolate themselves because of not having access to cleanliness.” Shower of Hope currently operates a truck and shower trailer that makes stops in two locations in Southern California—All Saints’ Episcopal Church in Highland Park and Holy Family Churchin South Pasadena.

“We offer, on average, 30 to 40 showers on Saturday mornings,” Tillekeratne said. “It’s really important that people have access to showers, and it’s also equally important that once they have access to showers they have access to clean clothes so they don’t have to worry about the smell coming from those clothes.”

Craft and charity

To help raise money and awareness for The Laundry Truck LA, Dolan has launched Dolan Handmade, a monthly series of craft events at her 26,000-square-foot factory in Vernon, Calif. Dolan is working with Mimi Haddon, an M.F.A. candidate in fiber art at California State University, Long Beach who teaches textile art and natural dyeing classes at the Craft & Folk Art Museum in Los Angeles.

Two of Haddon’s fiber-art pieces were recently installed in the lunchroom at Dolan Group. The oversized macramé pieces, made from brightly colored knit fabric from Dolan’s surplus fabric inventory, are suspended from the ceiling.

Haddon, who was named Dolan Group’s artist in residence, has led classes in natural dyeing and macramé at the apparel factory. The next workshop, set for Sept. 28, will focus on marble dyeing on Turkish towels. Future events will include block printing, sashiko (Japanese embroidery) and eco-dyeing using pressed flowers on silk. Tickets for Dolan Handmade are $45, which includes supplies, and all proceeds benefit The Laundry Truck LA.

The Dolan Group will also donate a portion of sales from its direct-to-consumer website for the Dolan brand, shopdolan.com, which will launch on Oct. 1. A portion of sales from Dolan clothing sold at retailers will also fund The Laundry Truck.

Path to The Laundry Truck

In recent years, Dolan has been looking for ways to make her business more environmentally and socially responsible. She researched renewable alternatives to the ubiquitous poly bags used to ship garments to retailers. She looked into recycling resources for all the excess fabric scraps left over after cutting. Her daily commute took her through Skid Row in downtown Los Angeles, located right next door to LA’s Fashion District. She began listening to podcasts about homelessness, looking for ways that she could help. “But I didn’t know where to start,” she said.

Then Dolan stumbled—literally—across a homeless woman who had ducked into a mid-city business to get out of the cold. The woman ran off when Dolan screamed, but the apparel manufacturer went after her to try to give her money to apologize for frightening her.

Dolan said she knew simply giving one person money wasn’t the right response. A week or two later, she overheard someone talking about the Monday Night Mission and its group of volunteers who feed people on Skid Row every night of the week. Dolan began volunteering with the group, making sandwiches and handing them out in front of the Midnight Mission on South San Pedro Street in downtown Los Angeles. The first time, Dolan went alone. Soon she was going weekly and many coworkers were joining her.

“Jodie was walking out of the office one night and said, ‘I’m going down to Skid Row. Do you want to come?’” said Christine Moore, who works in product development for Dolan. “I’d never known anyone who would go to Skid Row. It was nothing at all what I envisioned. I thought it would be like a soup kitchen. It was an eyeopener.”

Before handing out food, volunteers are given frank advice about staying safe while volunteering on Skid Row.

“I almost turned around and left after the safety briefing. I thought, ‘What did I get myself into?’” Moore said. “But I trust Jodie. I’m so glad I stayed. This group is organized. It’s a well-ordered machine.”

Dolan and her employees have volunteered their time for other organizations as well. A group joined a march in support of Measure HHH, the Homelessness Reduction and Prevention Housing, and Facilities Bond Issue initiative that was approved by Los Angeles voters in November.

The entire Dolan team volunteered at the Downtown Women’s Center, working in the kitchen at the main campus on San Pedro Street and in the DWC’s retail store, MADE by DWC, on Los Angeles Street.

It took longer for Kate Anylan, Dolan’s brand director, to join the group at the Monday Night Mission.

“I’m happy to help people and contribute, but I was scared to go the first time,” Anylan said. “While we were making sandwiches I was thinking I’m not really sure what will happen next.” By the end of the night, Anylan’s impression had changed. “When I left I had so much energy and wanted to talk about it,” she said.

Recently, Anylan returned to the Monday Night Mission with 100 hard-boiled eggs, which turned out to be a big hit. Word got out on Skid Row, and more people began arriving, asking if there were more.

Dolan said the turnout for the Monday Night Mission ranges from about a dozen volunteers to upwards of 40. Many are college students. And most heard about the organization the way Dolan did—through word of mouth.

“It’s very cool how people hear about it,” Anylan said. “And they make sure to squeeze it into their schedule.”

Moore said there’s a feeling of commitment—not just among the regular volunteers but among the Skid Row residents.

“I feel like I have friends down there,” she said. “It warms the heart to see these people as people every week and know their names. You see past the problems. It makes it more meaningful.”

Dolan designer Greta Gunther was another early volunteer at the Monday Night Mission. The first time she went, she was asked to greet people as they arrived.

“My first experience was physical contact,” Gunther said. “I looked them in the eye and shook their hand and interacted with them. I wasn’t expecting the intensity. But Jodie made it so casual sounding. It’s amazing that our boss was involved.”

That direct contact with the people living on the streets is what keeps Dolan coming back.

“That’s why Skid Row is so powerful,” she said. “You’re handing someone a sandwich and shaking their hand and talking to them. You have a little picture of what’s going on. You see all of it. You’re getting out of your world.”

For more information about The Laundry Truck LA, fund-raising efforts and the Dolan Handmade workshops, visit shopdolan.com.

#los angeles #fashion blog

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fath-k · 7 years

Text

Topic 2 - IEE 802 & RS232/RS422

Question 1;

IEEE 802 : Institute of Electrical and Electronic Engineering.

Research the IEEE 802 working groups. List each group with a brief description and state whether it is active or not.

802.1 - Interconnection (Bridging). IEEE 802.1 handles the network management and security of LAN, MAN and WAN standardized by IEEE 802. IEEE 802.1 is active.

802.2 - Logical Link. IEEE 802.2 concerned with issues of multiplexing, flow control, and detection and retransmission of dropped frames. IEEE 802.2 is inactive. ( serial connection DCE and DTE )

802.3 - Ethernet. IEEE 802.3 specifies the physical and networking characteristics of an Ethernet network, like how physical connections between nodes (routers/switches/hubs) are made through various wired media like copper coaxial or fiber cable. IEEE 802.3 is active.

802.4 - Token Bus. IEEE 802.4 for a local area network (LAN) token passing protocol based on a physical bus topology, which is used in the MAP factory automation protocol. IEEE 802.4 is disband because of lack of interest. .

802.5 - Token Ring. IEEE 802.5 for a token ring local area network access method, which is widely implemented in Token Ring. IEEE 802.5 is inactive.

802.6 - Metropolitan Area Networks (DQDB). IEEE 802.6 is a standard for Metropolitan Area Networks (MANs). IEEE 802.6 is disband.

802.7 - Broadband LAN. IEEE 802.7 is a standard for a broadband local area network (LAN) using coaxial cable. This standard was developed for cable Internet companies. IEEE 802.7 is disband.

802.8 - Fiber Optic TAG. IEEE 802.8 was a working group concerned with designing a fiber optic LAN. This protocol was never adopted and IEEE 802.8 is disband.

802.9 - Isochronous LAN. IEEE 802.9 is design for the integration of voice and data networks, both within the LAN domain and interfacing to publicly and privately administered networks running protocols. IEEE 802.9 is withdraw.

802.10 - Security. IEEE 802.10 is standard for Interoperable LAN/MAN Security (SILS). IEEE 802.10 is withdraw in 2004.

802.11 - Wireless LAN. IEEE 802.11 is the protocol commonly used for wireless networking. Variants include 802.8g ("wireless-g") and 802.8n ("wireless-n"). IEEE 802.11 is active.

802.12 - Demand Priority. IEEE 802.12 standard for 100+ Mbps LANs using demand priority access. The focus was on 100VG-AnyLAN, a standard that is considered obsolete. IEEE 802.12 is inactive.

802.14 - Cable Modem. IEEE 802.14 for Broadband Cable Access Method and Physical Layer Specification in Local and Metropolitan Networks. IEEE 802.14 is withdraw.

802.15 - Wireless Personal Aread Network (PAN). IEEE 802.15 is a protocol defined for personal area network (usually meaning a network between only two devices). 802.15.1 is commonly known as Bluetooth. IEEE 802.15 is active.

802.16 - Broadband Wireless. IEEE 802.16 is a group of broadband wireless communications standards for metropolitan area networks (MANs) developed by a working group of the Institute of Electrical and Electronics Engineers (IEEE). IEEE 802.16 is active.

802.17 - Resilient Packet Ring. IEEE 802.17 is part of the IEEE's local area network (LAN) and metropolitan area network (MAN) Committee and with the intention of creating a new Media Access Control layer for fiber optic rings. IEEE 802.17 is active.

802.18 - Radio Regulatory Technical Advisory Group. IEEE 802.18 doesn’t create wireless standards but helps to create the correct regulatory environment. IEEE 802.18 is active.

802.19 - Wireless Coexistence Technical Advisory Group. IEEE 802.19 specifies radio technology independent methods for network-based coexistence among dissimilar or independently operated networks of unlicensed devices and dissimilar unlicensed devices. IEEE 802.19 is active.

802.20 - Mobile Broadband Wireless. IEEE 802.20 provides an introduction to the activities with regard to this standard, including purpose and scope that the specification defines. IEEE 802.20 is active.

802.21 - Media Independent Handoff. IEEE 802.21 enables the optimization of services including handover service when performed between heterogeneous IEEE 802 networks. It also facilitates these services when networking between IEEE 802 networks and Cellular networks. IEEE 802.21 is active.

802.22 - Wireless Regional Area Networks. IEEE 802.22 standard for fixed wireless broadband access in rural and remote areas. IEEE 802.22 is active.

Question 2;

Research the following standards and for each standard, briefly describe the devices to which it relates.

a) RS232

RS-232 is a standard communication protocol for linking computer and its peripheral devices to allow serial data exchange. In simple terms RS232 defines the voltage for the path used for data exchange between the devices. It specifies common voltage and signal level, common pin wire configuration and minimum, amount of control signals.

An devices that relates are the interface between Data terminal equipment ( DTE )and Data communication equipment ( DCE ). These two devices communicate with each other by handshaking. It allows a DTE and a DCE device system to acknowledge each other before sending the data.

b) RS422

The RS422 Standard defines a serial communications standard. RS422 is a high speed and/or long distance data transmission. Each signal is carried by a pair of wires and is thus a differential data transmission system.

The devices that relates are the communication between DTE, data terminal equipment, and DCE, data communication equipment.

Reference;

SearchMobileComputing. (2017). IEEE 802 Wireless Standards: Fast Reference - Reference from WhatIs.com. [online] Available at: http://searchmobilecomputing.techtarget.com/definition/IEEE-802-Wireless-Standards-Fast-Reference [Accessed 12 Apr. 2017].

Protocols.netlab.uky.edu. (2017). [online] Available at: http://protocols.netlab.uky.edu/~calvert/classes/571/lectureslides/802overview.pdf [Accessed 12 Apr. 2017].

Techopedia.com. (2017). What is the IEEE 802.1 Working Group (IEEE 802.1)? - Definition from Techopedia. [online] Available at: https://www.techopedia.com/definition/19936/ieee-8021-working-group-ieee-8021 [Accessed 12 Apr. 2017].

Yourdictionary.com. (2017). 802.2 dictionary definition | 802.2 defined. [online] Available at: http://www.yourdictionary.com/802-2 [Accessed 12 Apr. 2017].

Techopedia.com. (2017). What is IEEE 802.3? - Definition from Techopedia. [online] Available at: https://www.techopedia.com/definition/19938/ieee-8023 [Accessed 12 Apr. 2017].

Yourdictionary.com. (2017). 802.4 dictionary definition | 802.4 defined. [online] Available at: http://www.yourdictionary.com/802-4 [Accessed 12 Apr. 2017].

Yourdictionary.com. (2017). 802.5 dictionary definition | 802.5 defined. [online] Available at: http://www.yourdictionary.com/802-5 [Accessed 12 Apr. 2017].

Yourdictionary.com. (2017). 802.7 dictionary definition | 802.7 defined. [online] Available at: http://www.yourdictionary.com/802-7 [Accessed 12 Apr. 2017].

Davis, C. and Davis, C. (2017). IEEE 802.8 Protocols | eHow. [online] eHow. Available at: http://www.ehow.com/list_7492144_ieee-8028-protocols.html [Accessed 12 Apr. 2017].

Yourdictionary.com. (2017). 802.9 dictionary definition | 802.9 defined. [online] Available at: http://www.yourdictionary.com/802-9 [Accessed 12 Apr. 2017].

Yourdictionary.com. (2017). 802.12 dictionary definition | 802.12 defined. [online] Available at: http://www.yourdictionary.com/802-12 [Accessed 12 Apr. 2017].

SearchMobileComputing. (2017). What is 802.16? - Definition from WhatIs.com. [online] Available at: http://searchmobilecomputing.techtarget.com/definition/80216 [Accessed 12 Apr. 2017].

SearchNetworking. (2017). What is Resilient Packet Ring (RPR)? - Definition from WhatIs.com. [online] Available at: http://searchnetworking.techtarget.com/definition/Resilient-Packet-Ring [Accessed 12 Apr. 2017].

Ieee802.org. (2017). [online] Available at: http://ieee802.org/misc-docs/GlobeCom2009/IEEE_802d18_and_d19_Kraemer.pdf [Accessed 12 Apr. 2017].

Ieee802.org. (2017). IEEE 802.19 Wireless Coexistence Working Group (WG). [online] Available at: http://www.ieee802.org/19/pub/TG1a.html [Accessed 12 Apr. 2017].

researchgate. (2017).https://www.researchgate.net/publication/3436161_IEEE_80220_Mobile_broadband_wireless_access [Accessed 12 Apr. 2017].

Ieee802.org. (2017). IEEE 802.21. [online] Available at: http://www.ieee802.org/21/ [Accessed 12 Apr. 2017].

Engineersgarage.com. (2017). What is RS232 Protocol: Basics, Implementation & Specification. [online] Available at: https://www.engineersgarage.com/articles/what-is-rs232 [Accessed 12 Apr. 2017].

Neteon.net. (2017). Main Differences of RS-232, RS-422 and RS-485. [online] Available at: https://www.neteon.net/learning-center/main-differences-between-rs-232-rs-422-and-rs-485 [Accessed 12 Apr. 2017].

#cn #MissJ #t2 #12/4/17

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