[ Mikky @ 17.03.2001. 22:57 ] @
aj ako moze neko da mi objasni malo koje sve postoje i njihove karakteristike ukratko, osim ovih klasicnih modemskih putem tel. linije sta su to isdn, cable, dsl, t1, t3 i koje jos postoje ako sam propustio neku |
[ Mikky @ 17.03.2001. 22:57 ] @
[ Dusan Marjanovic @ 18.03.2001. 00:26 ] @
Pa recimo kod ISDN-a mozes da imas jedan ili dva kanala, kada su 2 veza ti je duplo brza ali i duplo ti idu impulsi,
T1 ide do 1,54Mb/s, T3 44.7 Mb/s, a imas i OC3 on ti je 155Mb/s, a cable, ne znam da li si mislio na cable modem ili sta?cable modem i t1,t3...itd. su razliciti pojmovi [ Gojko Vujovic @ 18.03.2001. 00:48 ] @
Te T1, T3 i slicno su americke oznake koje imaju svoje evropske ekvivalente. I u evropi uopste nisam video da neko nudi T3 na primer nego valjda DS3 ako se dobro secam. A za cable modem ce ti jabolje reci neko ko ga ima. Ja sam cuo da je do 8 megabita u sekundi, ali da dosta opada jer se deli sa komsijama..
[ UroS @ 18.03.2001. 11:38 ] @
gojko u evropi ti je E1 isto sto i T1 u svetu a E3 isto sto je u svetu T3
a to sto si ti video DS3 ... to je isto neka konekcija 155 megabita nesto slicno ko oc3 t1 = oko 2 megabita t3 = oko 34 megabita oc3 = oko 155 megabita dsl = zavisi cable = zavisi al sto se home upotrebe tice najbolje je imati dsl ili cable... ali mi u yu o tome mozemo samo da mashtamo... [ Gojko Vujovic @ 18.03.2001. 13:28 ] @
Heh ja mislim da nam ni mastanje nije dozvoljeno
![]() [ Mikky @ 19.03.2001. 22:17 ] @
dakle t1 je oko 2mbit / s a t3 oko 34mbit/s (sta se desilo sa T2......da nije mozda stavljen copyright na to jos 91 kad je izasao terminator2
![]() znaci oni likovi na napsteru npr. sto imaju te besne veze tipa t3 imaju jace veze nego svi nasi provajderi zajedno?? ebem ti nas internet onda od cega zavisi to cable i dsl sta je to u opste, kako se to povezuje od korisnika ka provajderu ili direktno na net or what? takodje kako isdn radi? jel kod ova tri ptt ima neku ulogu posrednika ili sve se odvija provajder korisnik ili kako vec mnogo pitanja znam ![]() [ Gojko Vujovic @ 20.03.2001. 11:11 ] @
DSL ide preko obicnih bakarnih parica (naravno boljeg kvaliteta) a Cable ide preko mreze kablovske televizije.
[ Borko Savic @ 20.03.2001. 16:09 ] @
Citat: Gojko wrote: DSL ide preko obicnih bakarnih parica (naravno boljeg kvaliteta) a Cable ide preko mreze kablovske televizije. DSL ide preko ISDN linije... do 8mb/s download, al je upload manji... ja mislim da je standardno 2mb/s upload & download standard [ Gojko Vujovic @ 20.03.2001. 18:25 ] @
Pa i ISDN linija ide preko tih istih zica sto sam rekao..
[ UroS @ 20.03.2001. 19:28 ] @
isdn ti je veza 128 KILOBITA[/B] po sekundi... sad veza je jebiga kako mu dodje... meni je sa 64 islo 12
[ m r v a @ 20.03.2001. 22:36 ] @
mozemo da sanjamo o cable-u ... al' je zato ASTRA realnost L;))
[ madafaka @ 21.03.2001. 00:07 ] @
Heh izvin`te sto ometam nego jel ona moja prva poruka bila nevidljiva pa se svi polomiste da odgovorite istim odgovorom na isto pitanje
![]() [ agentsmith @ 21.03.2001. 08:02 ] @
E sad i ja da izjavim nesto za dnevnik
![]() t1 = 1,54 Mbit/s t3 = 34 Mbit/s E1 = 2 Mbit/s DS3 moze da ide do 155 Mbit/s to je Dedicated Service Connection i obichno sluzi za povezivanje chvorishta i velikih datacentrova putem OPTICHKOG kabla. OCxxx su oznake za OPTICAL CARRIER veze kojima se opseg povecava kombinacijom optichkih vlakana u kablu. Inache mogu da idu do 10 GigaBit/s (OC 192 iliti STM-42) i tada se koriste kombinacije od vishe 850 nm lasera. mnogo skupa stvarchica itd itd.... E sad xDSL i cable su razlichite stvari. xDSL obichno ide po postojecim telefonskim paricama (znachi obichan dvozichni vod 0.5 mm parice ili deblje) i koristi odredjeni frekventni opseg koji se ne koristi u telefoniji (telefonija koristi samo 3% kapaciteta prenosnog voda). pri tome xDSL moze da ide do 8 Mbit/s u oba smera maximalno. e sad to zavisi od toga kako je koncentrator podeshen i koja je tehnologija upotrebljena i naravno koliko ljudi je na koncentrator zakacheno. Cable je slichna stvar samo se razlikuje u prenosnom putu i vece je g**** od xDSL-a ![]() huh... to je to P.S. obichno vecina xDSL modema ima opciju da rade i kao E1 modemi (kao moj lepotan Watson 4) [ m r v a @ 22.03.2001. 15:53 ] @
samo da dodam da su ameri postigli novi rekord ....
na razdaljini od 250 km ... pomocu otpickog kabla ... razvijena je brzina od 10 Tbs ( terabita ) ... znaci 20480 Gbs ( Gigabita ) woooofff [Ovu poruku je menjao m r v a dana 03-22-2001 u 04:53 PM GMT] [ UroS @ 22.03.2001. 20:18 ] @
pa mislim cemu je svrha kad tolko nijedan harddisk ne moze da ostvari...
jedino ako je neki ultra jebiga [ nullb0x @ 22.03.2001. 20:50 ] @
A sto uopste da se diskutuje o tome kada, kao sto je Uros rekao, mozemo samo da mastamo...
Kod nas je trenutno najbolji satelitski link [licno iskustvo]... [ UroS @ 23.03.2001. 00:22 ] @
pa mozes ti da uvedes poprecnu vezu to ti je bolje od satelita...
al je i skuplje [ agentsmith @ 23.03.2001. 23:18 ] @
Pa tu i nije namena da se nesto radi sa hddovima...
to rade switchevi i ruteri. jebiga tu ide 10 TB podataka u kojima su podaci od 100000 ljudi i to se dalje na chvorishtima deli... Mada ***ote 10TB... na 250 KM.... ***ote mogu da zamislim tu optiku.... daj mi link de ima to... Btw satelit sucks.... posebno Astra... kashnjenje feat. smetnje = shit zice rulz ![]() [ m r v a @ 24.03.2001. 16:57 ] @
vido ja u vestima Mikro Knjige
[ Gojko Vujovic @ 25.03.2001. 15:24 ] @
Fast Guide to DSL
DSL (Digital Subscriber Line) is a technology for bringing high-bandwidth information to homes and small businesses over ordinary copper telephone lines. xDSL refers to different variations of DSL, such as ADSL, HDSL, and RADSL. Assuming your home or small business is close enough to a telephone company central office that offers DSL service, you may be able to receive data at rates up to 6.1 megabits (millions of bits) per second (of a theoretical 8.448 megabits per second), enabling continuous transmission of motion video, audio, and even 3-D effects. More typically, individual connections will provide from 1.544 Mbps to 512 Kbps downstream and about 128 Kbps upstream. A DSL line can carry both data and voice signals and the data part of the line is continuously connected. DSL installations began in 1998 and will continue at a greatly increased pace through the next decade in a number of communities in the U.S. and elsewhere. Compaq, Intel, and Microsoft working with telephone companies have developed a standard and easier-to-install form of ADSL called G.Lite that is accelerating deployment. DSL is expected to replace ISDN in many areas and to compete with the cable modem in bringing multimedia and 3-D to homes and small businesses. How It Works Traditional phone service (sometimes called "Plain Old Telephone Service" or POTS) connects your home or small business to a telephone company office over copper wires that are wound around each other and called twisted pair. Traditional phone service was created to let you exchange voice information with other phone users and the type of signal used for this kind of transmission is called an analog signal. An input device such as a phone set takes an acoustic signal (which is a natural analog signal) and converts it into an electrical equivalent in terms of volume (signal amplitude) and pitch (frequency of wave change). Since the telephone company's signalling is already set up for this analog wave transmission, it's easier for it to use that as the way to get information back and forth between your telephone and the telephone company. That's why your computer has to have a modem - so that it can demodulate the analog signal and turn its values into the string of 0 and 1 values that is called digital information. Because analog transmission only uses a small portion of the available amount of information that could be transmitted over copper wires, the maximum amount of data that you can receive using ordinary modems is about 56 Kbps (thousands of bits per second). (With ISDN, which one might think of as a limited precursor to DSL, you can receive up to 128 Kbps.) The ability of your computer to receive information is constrained by the fact that the telephone company filters information that arrives as digital data, puts it into analog form for your telephone line, and requires your modem to change it back into digital. In other words, the analog transmission between your home or business and the phone company is a bandwidth bottleneck. Digital Subscriber Line is a technology that assumes digital data does not require change into analog form and back. Digital data is transmitted to your computer directly as digital data and this allows the phone company to use a much wider bandwidth for transmitting it to you. Meanwhile, if you choose, the signal can be separated so that some of the bandwidth is used to transmit an analog signal so that you can use your telephone and computer on the same line and at the same time. Splitter-based vs. Splitterless DSL Most DSL technologies require that a signal splitter be installed at a home or business, requiring the expense of a phone company visit and installation. However, it is possible to manage the splitting remotely from the central office. This is known as splitterless DSL, "DSL Lite," G.Lite, or Universal ADSL and has recently been made a standard. Modulation Technologies Several modulation technologies are used by various kinds of DSL, although these are being standardized by the International Telecommunication Union (term>ITUFactors Affecting the Experienced Data Rate DSL modems follow the data rate multiples established by North American and European standards. In general, the maximum range for DSL without a repeater is 5.5 km (18,000 feet). As distance decreases toward the telephone company office, the data rate increases. Another factor is the gauge of the copper wire. The heavier 24 gauge wire carries the same data rate farther than 26 gauge wire. If you live beyond the 5.5 kilometer range, you may still be able to have DSL if your phone company has extended the local loop with optical fiber cable. The Digital Subscriber Line Access Multiplexer (DSLAM) To interconnect multiple DSL users to a high-speed backbone network, the telephone company uses a Digital Subscriber Line Access Multiplexer (DSLAM). Typically, the DSLAM connects to an asynchronous transfer mode (ATM) network that can aggregate data transmission at gigabit data rates. At the other end of each transmission, a DSLAM demultiplexes the signals and forwards them to appropriate individual DSL connections. Who's Offering It When Here is a sample of current and planned offerings in the U.S. DSL is also offered in the UK and elsewhere. Cybertel offers both ADSL residential and HDSL commercial service to many cities in the U.S. According to Flashcom, it is now the largest and fastest growing provider of DSL service in the United States. Service is now available in all major US cities. Pricing starts at $49.95 monthly and includes Internet access. In most locations, installation and customer premise equipment is free with a two-year agreement. FreeDSL offers free hardware and setup and no monthly charge in a number of markets. For the service, users must agree to provide personal information for demographic use and to have a small navigational bar containing advertising always visible while connected. To get the free DSL modem, you need to refer 10 people to the FreeDSL site. There may be other requirements. In the Midwest United States, Primary Network is offering DSL service to St. Louis, Missouri-area residents and businesses. Primary Network says that it is or will be the largest Midwest provider of DSL service, with 20 central office sites. Download maximums are between 384 Kbps and 1.54 Mbps. Upload maximums are between 128 Kbps and 384 Kbps. Prices start at $49.95 monthly and include Internet Access. For more information, visit http://www.primary.net/dsl/. Bluestar Communications is currently offering DSL in Nashville and Memphis, Tennessee, and in Louisville and Lexington, Kentucky, and plans to offer service in 25 other cities by early 2000. SBC Communications plans to bring ADSL to over 8 million homes in California, Missouri, and Texas by the beginning of 2000. In California, over 255 telephone company central offices will provide service to 5 million homes and 900,000 businesses. In Missouri and Texas, SBC's Southwestern Bell company will upgrade 271 central offices for 3.2 million homes and 440,000 businesses. Customers will need a $198 "ADSL modem" and will pay a basic $39 a month on yearly basis for unlimited service, or $49 with access to the Internet. Business or high-demand users can pay more and get faster download and upload speeds. For the basic rate, users are guaranteed 384 Kbps downstream and 128 Kbps upstream. Power users can get up to 6 Mbps downstream and 384 Kbps upstream. Bell Atlantic has announced plans for a wide deployment of ASDL in the Northeastern U.S. to both home and corporate customers. The service is currently offered in the Boston, Philadelphia, Pittsburgh, Washington DC, and Northern New Jersey metropolitan areas. The New York City metropolitan area launched in mid-July, 1999. Additional markets will be announced in the future. Bell Atlantic offers what it calls Personal Infospeed DSL at speeds of 640 Kbps downstream and 90 Kbps upstream for $39.95 a month, or $59.95 a month including Internet access. Professional Infospeed offers speeds of 1.6 Mbps downstream and 90 Kbps upstream at $59.95 per month, or $109.95 per month with Internet access. Power Infospeed provides up to 7.1 Mbps downstream and 680 Kbps upstream for $109.95 per month, or $189.95 per month with Internet access. Network equipment providers are Alcatel, Globespan, and Westell. Among PC manufacturers that will support Infospeed technology are Apple Computer, Compaq, and Dell Computer. BellSouth is offering a splitter-based ADSL service in 30 markets through Network Service Provider (NSP) channels. BellSouth provides access to all DSL-qualified loops through a single asynchronous transfer mode (ATM) port in each of 13 LATAs in eight Southeastern states. Access One, BellSouth's service partner, has committed to deploy a minimum of 10,000 DSL lines to its customers over the next two years. US West plans to offer DSL service in 40 cities in the western part of the U.S. Currently, DSL is offered in Portland, Oregon, and Seattle, Washington. US West uses CAP modulation but says they are equipped to support DMT if that becomes a standard. NETinc, a Canadian company, is deploying ADSL in Hamilton, Ontario, using Paradyne technology. Dowstream data rates will be up to 7 Mbps and upstream up to 1 Mbps. Service to residences will be about $50 a month, to corporations $200 a month. Optimum Communications furnishes both ADSL and HDSL in the Florida West Coast/Tampa area. Downstream data rates are up to 3.2 Mbps and upstream up to 1.2 Mbps. Monthly rates are about $99 a month. The ADSL Forum offers a much more complete List of ADSL Trials and Deployments. Hardware Offerings Rockwell's Consumer DSL chipset is used in telecommunications equipment made by Nortel Networks. Nortel sells the equipment to carriers and to Internet service providers and Rockwell sells the modems through the usual retail channels. The equipment offers a 1 Mbps data rate. 3Com and Texas Instruments offer a hybrid modem supporting both dial-up 56 Kbps and rate adaptive ADSL (RADSL). Types of DSL ADSL The variation called ADSL (Asymmetric Digital Subscriber Line) is the form of DSL that will become most familiar to home and small business users. ADSL is called "asymmetric" because most of its two-way or duplex bandwidth is devoted to the downstream direction, sending data to the user. Only a small portion of bandwidth is available for upstream or user-interaction messages. However, most Internet and especially graphics- or multi-media intensive Web data need lots of downstream bandwidth, but user requests and responses are small and require little upstream bandwidth. Using ADSL, up to 6.1 megabits per second of data can be sent downstream and up to 640 Kbps upstream. The high downstream bandwidth means that your telephone line will be able to bring motion video, audio, and 3-D images to your computer or hooked-in TV set. In addition, a small portion of the downstream bandwidth can be devoted to voice rather data, and you can hold phone conversations without requiring a separate line. Unlike a similar service over your cable TV line, using ADSL, you won't be competing for bandwidth with neighbors in your area. In many cases, your existing telephone lines will work with ADSL. In some areas, they may need upgrading. CDSL CDSL (Consumer DSL) is a trademarked version of DSL that is somewhat slower than ADSL (1 Mbps downstream, probably less upstream) but has the advantage that a "splitter" does not need to be installed at the user's end. Rockwell, which owns the technology and makes a chipset for it, believes that phone companies should be able to deliver it in the $40-45 a month price range. CDSL uses its own carrier technology rather than DMT or CAP ADSL technology. FreeDSL A service offering and not a technology, FreeDSL is a company offering free ADSL hardware and setup with no monthly charge for service. For the service, users must agree to provide personal information for demographic use and to have a small navigational bar containing advertising always visible while connected. To get the free DSL modem, you need to refer 10 people to the FreeDSL site. There may be other requirements. FreeDSL reportedly plans to offer optional premium services at a future time. G.Lite or DSL Lite G.Lite (also known as DSL Lite, splitterless ADSL, and Universal ADSL) is essentially a slower ADSL that doesn't require splitting of the line at the user end but manages to split it for the user remotely at the telephone company. This saves the cost of what the phone companies call "the truck roll." G.Lite, officially ITU-T standard G-992.2, provides a data rate from 1.544 Mbps to 6 Mpbs downstream and from 128 Kbps to 384 Kbps upstream. G.Lite is expected to become the most widely installed form of DSL. HDSL The earliest variation of DSL to be widely used has been HDSL (High bit-rate DSL) which is used for wideband digital transmission within a corporate site and between the telephone company and a customer. The main characteristic of HDSL is that it is symmetrical: an equal amount of bandwidth is available in both directions. For this reason, the maximum data rate is lower than for ADSL. HDSL can carry as much on a single wire of twisted-pair as can be carried on a T1 line in North America or an E1 line in Europe (2,320 Kbps). IDSL IDSL (ISDN DSL) is somewhat of a misnomer since it's really closer to ISDN data rates and service at 128 Kbps than to the much higher rates of ADSL. RADSL RADSL (Rate-Adaptive DSL) is an ADSL technology from Westell in which software is able to determine the rate at which signals can be transmitted on a given customer phone line and adjust the delivery rate accordingly. Westell's FlexCap2 system uses RADSL to deliver from 640 Kbps to 2.2 Mbps downstream and from 272 Kbps to 1.088 Mbps upstream over an existing line. SDSL SDSL (Symmetric DSL) is similar to HDSL with a single twisted-pair line, carrying 1.544 Mbps (U.S. and Canada) or 2.048 Mbps (Europe) each direction on a duplex line. It's symmetric because the data rate is the same in both directions. UDSL UDSL (Unidirectional DSL) is a proposal from a European company. It's a unidirectional version of HDSL. VDSL VDSL (Very high data rate DSL) is a developing technology that promises much higher data rates over relatively short distances (between 51 and 55 Mbps over lines up to 1,000 feet or 300 meters in length). It's envisioned that VDSL may emerge somewhat after ADSL is widely deployed and co-exist with it. The transmission technology (CAP, DMT, or other) and its effectiveness in some environments is not yet determined. A number of standards organizations are working on it. x2/DSL x2/DSL is a modem from 3Com that supports 56 Kbps modem communication but is upgradeable through new software installation to ADSL when it becomes available in the user's area. 3Com calls it "the last modem you will ever need." A DSL Summary Table DSL Type Description Data Rate Downstream; Upstream Distance Limit Application IDSL ISDN Digital Subscriber Line 128 Kbps 18,000 feet on 24 gauge wire Similar to the ISDN BRI service but data only (no voice on the same line) CDSL Consumer DSL from Rockwell 1 Mbps downstream; less upstream 18,000 feet on 24 gauge wire Splitterless home and small business service; similar to DSL Lite DSL Lite (same as G.Lite) "Splitterless" DSL without the "truck roll" From 1.544 Mbps to 6 Mbps downstream, depending on the subscribed service 18,000 feet on 24 gauge wire The standard ADSL; sacrifices speed for not having to install a splitter at the user's home or business G.Lite (same as DSL Lite) "Splitterless" DSL without the "truck roll" From 1.544 Mbps to 6 Mbps , depending on the subscribed service 18,000 feet on 24 gauge wire The standard ADSL; sacrifices speed for not having to install a splitter at the user's home or business HDSL High bit-rate Digital Subscriber Line 1.544 Mbps duplex on two twisted-pair lines; 2.048 Mbps duplex on three twisted-pair lines 12,000 feet on 24 gauge wire T1/E1 service between server and phone company or within a company; WAN, LAN, server access SDSL Symmetric DSL 1.544 Mbps duplex (U.S. and Canada); 2.048 Mbps (Europe) on a single duplex line downstream and upstream 12,000 feet on 24 gauge wire Same as for HDSL but requiring only one line of twisted-pair ADSL Asymmetric Digital Subscriber Line 1.544 to 6.1 Mbps downstream; 16 to 640 Kbps upstream 1.544 Mbps at 18,000 feet; 2.048 Mbps at 16,000 feet; 6.312 Mpbs at 12,000 feet; 8.448 Mbps at 9,000 feet Used for Internet and Web access, motion video, video on demand, remote LAN access RADSL Rate-Adaptive DSL from Westell Adapted to the line, 640 Kbps to 2.2 Mbps downstream; 272 Kbps to 1.088 Mbps upstream Not provided Similar to ADSL UDSL Unidirectional DSL proposed by a company in Europe Not known Not known Similar to HDSL VDSL Very high Digital Subscriber Line 12.9 to 52.8 Mbps downstream; 1.5 to 2.3 Mbps upstream; 1.6 Mbps to 2.3 Mbps downstream 4,500 feet at 12.96 Mbps; 3,000 feet at 25.82 Mbps; 1,000 feet at 51.84 Mbps ATM networks; Fiber to the Neighborhood [ Gojko Vujovic @ 25.03.2001. 15:27 ] @
The speed of...
Carrier | Technology | Speed | Physical Medium | Application -------------------------------------------------------------------- GSM mobile telephone service 9.6 to 14.4 Kbps RF in space (wireless) Mobile telephone for business and personal use High-speed circuit-switched data service (HSCSD) Up to 56 Kbps RF in space (wireless) Mobile telephone for business and personal use Regular telephone service (POTS) Up to 56 Kbps Twisted pair Home and small business access Dedicated 56Kbps on frame relay 56 Kbps Various Business e-mail with fairly large file attachments DS0 64 Kbps All The base signal on a channel in the set of Digital Signal levels General Packet Radio System (GPRS) 56 to 114 Kbps RF in space (wireless) Mobile telephone for business and personal use (available in 2000) ISDN BRI: 64 Kbps to 128 Kbps PRI: 23 (T-1) or 30 (E1) assignable 64-Kbps channels plus control channel; up to 1.544 Mbps (T-1) or 2.048 (E1) BRI: Twisted-pair PRI: T-1 or E1 line BRI: Faster home and small business access PRI: Medium and large enterprise access IDSL 128 Kbps Twisted-pair Faster home and small business access AppleTalk 230.4 Kbps Twisted pair Local area network for Apple devices; several networks can be bridged; non-Apple devices can also be connected Enhanced Data GSM Environment (EDGE) 384 Kbps RF in space (wireless) Mobile telephone for business and personal use (available in 2001) Satellite 400 Kbps (DirecPC and others) RF in space (wireless) Faster home and small enterprise access Frame relay 56 Kbps to 1.544 Mbps Twisted-pair or coaxial cable Large company backbone for LANs to ISP ISP to Internet infrastructure DS1/T-1 1.544 Mbps Twisted-pair, coaxial cable, or optical fiber Large company to ISP ISP to Internet infrastructure Universal Mobile Telecommunications Service (UMTS) Up to 2 Mbps RF in space (wireless) Mobile telephone for business and personal use (available in 2002) E-carrier 2.048 Mbps Twisted-pair, coaxial cable, or optical fiber 32-channel European equivalent of T-1 T-1C (DS1C) 3.152 Mbps Twisted-pair, coaxial cable, or optical fiber Large company to ISP ISP to Internet infrastructure IBM Token Ring/802.5 4 Mbps (also 16 Mbps) Twisted-pair, coaxial cable, or optical fiber Second most commonly-used local area network after Ethernet DS2/T-2 6.312 Mbps Twisted-pair, coaxial cable, or optical fiber Large company to ISP ISP to Internet infrastructure Digital Subscriber Line (DSL) 512 Kbps to 8 Mbps Twisted-pair (used as a digital, broadband medium) Home, small business, and enterprise access using existing copper lines E-2 8.448 Mbps Twisted-pair, coaxial cable, or optical fiber Carries four multiplexed E-1 signals Cable modem 512 Kbps to 52 Mbps (see "Key and explanation" below) Coaxial cable (usually uses Ethernet); in some systems, telephone used for upstream requests Home, business, school access Ethernet 10 Mbps 10BASE-T (twisted-pair); 10BASE-2 or -5 (coaxial cable); 10BASE-F (optical fiber) Most popular business local area network (LAN) IBM Token Ring/802.5 16 Mbps (also 4 Mbps) Twisted-pair, coaxial cable, or optical fiber Second most commonly-used local area network after Ethernet E-3 34.368 Mbps Twisted-pair or optical fiber Carries 16 E-l signals DS3/T-3 44.736 Mbps Coaxial cable ISP to Internet infrastructure Smaller links within Internet infrastructure OC-1 51.84 Mbps Optical fiber ISP to Internet infrastructure Smaller links within Internet infrastructure High-Speed Serial Interface (HSSI) Up to 53 Mbps HSSI cable Between router hardware and WAN lines Short-range (50 feet) interconnection between slower LAN devices and faster WAN lines Fast Ethernet 100 Mbps 100BASE-T (twisted pair); 100BASE-T (twisted pair); 100BASE-T (optical fiber) Workstations with 10 Mbps Ethernet cards can plug into a Fast Ethernet LAN Fiber Distributed-Data Interface (FDDI) 100 Mbps Optical fiber Large, wide-range LAN usually in a large company or a larger ISP T-3D (DS3D) 135 Mbps Optical fiber ISP to Internet infrastructure Smaller links within Internet infrastructure E--4 139.264 Mbps Optical fiber Carries 4 E3 channels Up to 1,920 simultaneous voice conversations OC-3/SDH 155.52 Mbps Optical fiber Large company backbone Internet backbone E-5 565.148 Mbps Optical fiber Carries 4 E4 channels Up to 7,680 simultaneous voice conversations OC-12/STM-4 622.08 Mbps Optical fiber Internet backbone Gigabit Ethernet 1 Gbps Optical fiber (and "copper" up to 25 meters) Workstations/networks with 10/100 Mbps Ethernet will plug into Gigabit Ethernet switches OC-24 1.244 Gbps Optical fiber Internet backbone SciNet 2.325 Gbps (15 OC-3 lines) Optical fiber Part of the vBNS backbone OC-48/STM-16 2.488 Gbps Optical fiber Internet backbone 2.488 Gbps Optical fiber Internet backbone OC-192/STM-64 10 Gbps Optical fiber Backbone 10 Gbps Optical fiber Backbone OC-256 13.271 Gbps Optical fiber Backbone Key and Explanation We use the U.S. English "Kbps" as the abbreviation for "thousands of bits per second." In international English outside the U.S., the equivalent usage is "kbits s-1" or "kbits/s". Engineers use data rate rather than speed, but speed (as in "Why isn't my Web page getting here faster?") seems more meaningful for the less technically inclined. Many of us tend to think that the number of bits getting somewhere over a period of time is their speed of travel. Relative to data transmission, a related term, bandwidth or "capacity," means how wide the pipe is and how quickly the bits can be sent down the channels in the pipe. (The analogy of multiple lanes on a superhighway with cars containing speed governors may help. One reason why digital traffic flows faster than voice traffic on the same copper line is because digital has managed to convert a one-lane or narrowband highway into a many-lane or broadband highway.) These "speeds" are aggregate speeds. That is, the data on the multiple signal channels within the carrier is usually allocated by channel for different uses or among different users. Key: "T" = T-carrier system in U.S., Canada, and Japan...."DS"= digital signal (that travels on the T-carrier or E-carrier)..."E" = Equivalent of "T" that uses all 8 bits per channel; used in countries other than U.S. Canada, and Japan...."OC" = optical carrier (Synchronous Optical Network)...."STM" = Synchronous Transport Modules (see Synchronous Digital Hierarchy) Only the most common technologies are shown. "Physical medium" is stated generally and doesn't specify the classes or numbers of pairs of twisted pair or whether optical fiber is single-mode or multimode. The effective distance of a technology is not shown. There are published standards for many of these technologies. Some of these are indicated on pages linked to from the table. Cable modem note:The upper limit of 52 Mbps on a cable is to an ISP, not currently to an individual PC. Most of today's PCs are limited to an internal design that can accomodate no more than 10 Mbps (although the PCI bus itself carries data at a faster speed). The 52 Mbps cable channel is subdivided among individual users. Obviously, the faster the channel, the fewer channels an ISP will require and the lower the cost to support an individual user. [ torbica @ 04.04.2001. 01:16 ] @
Citat: Mikky wrote: aj ako moze neko da mi objasni malo koje sve postoje i njihove karakteristike ukratko, osim ovih klasicnih modemskih putem tel. linije sta su to isdn, cable, dsl, t1, t3 i koje jos postoje ako sam propustio neku evo vidi sta nase renomirane firme misle http://www.telekomunikacije.co.yu/tlf/isdn4.html udruzene u kozorcijum telekomunikacije.co.yu ![]() [Ovu poruku je menjao torbica dana 04-04-2001 u 01:17 AM GMT] [ torbica @ 04.04.2001. 01:21 ] @
Citat: m r v a wrote: mozemo da sanjamo o cable-u ... al' je zato ASTRA realnost L;)) obzirom da sam od novembra 99 distributer astre izjavljujem odgovorno da je EON europeonlinenetwork sada shit za end user-a spor je za surf isprekidano do 100kbit/s, odziv je veliki, iskljucivo kad na flash get dl -jes dobijes do 200 kbit/s trazim nove provajdere... ispalti se iskljucivo postavljati je na proxy po mrezama koje su na poprecnim vezama, tu su ustede i do 60% CIR-a [ Gojko Vujovic @ 04.04.2001. 10:24 ] @
Cuo sam da ce neka americka firma poceti i po evropi da pruza internet-preko-satelita. Pretpostavljam da je to ona DirecPC.
[ m r v a @ 04.04.2001. 10:58 ] @
a kad ce to ?
... posto se sad lomim ... dal' da uzmem astru ... il' da cekam ... [ agentsmith @ 04.04.2001. 19:34 ] @
Trebao bi InterPacket isto da pochne nesto. Prichao sam sa ortakom iz Londona koji shljaka tamo. EON sucks
[ torbica @ 05.04.2001. 00:34 ] @
Citat: m r v a wrote: a kad ce to ? ... posto se sad lomim ... dal' da uzmem astru ... il' da cekam ... cekaj ![]() kuva se kuva.... bichete obavesteni [ torbica @ 05.04.2001. 00:36 ] @
Citat: Gojko wrote: Cuo sam da ce neka americka firma poceti i po evropi da pruza internet-preko-satelita. Pretpostavljam da je to ona DirecPC. Direc PC sucks, njih zastupa pogled iz nisa vec par godina, skupiiiiii su ispori ali ima 10-tak provajdera iz evrope [ torbica @ 05.04.2001. 00:42 ] @
Citat: agentsmith wrote: Trebao bi InterPacket isto da pochne nesto. Prichao sam sa ortakom iz Londona koji shljaka tamo. EON sucks interpacket je imao enduser system ali su ga popunili a izuzetno su kvalitetni... evo njihove cene, al da Vam ne pozli <font color="blue"> Hi Zoran, I am attaching a documents with some information regarding our company and services. you will also some prices for a duplex configuration Below are some examples for the simplex configurations: 128K dedicated = US$ 1,150 per month CIR 128K burstable 256K = US$ 1,265 per month 256K dedicated = US$ 2,178 per month CIR 256 burstable 512 = uS$ 2,396 per month 512 dedicated = uS$ 3,850 per month CIR 512 burstable 1Mb = uS$ 4,235 per month Activation fee: 1,500 US$ Equipment and shipping: 2,000 US$ The equipment includes a DVB satellite receiver, the LNB and the IFL cable. The simplex configuration is very easy and fast to install. In fact I usually recommend our customers to start with simplex and then upgrade to duplex when they will get a license for TX. AS for duplex, to get started , we require a signed contract, a deposit of one month, the activation fee, the first month of service and the equipment and shipping fee. Once we receive these funds, we can ship DHL in 5 days and once you get the equipment, the installation will take 2 days. You will also need to buy a R/o antenna that you can find easily locally. the antenna has to be 1.8m and Ku-band (I will give you later full specifications) Hope I covered everything, let me know what you think All the best Charlotte The prices are based on a two year contract and are valid for one month from today </font> [ m r v a @ 05.04.2001. 16:24 ] @
Citat: torbica wrote: Citat: m r v a wrote: a kad ce to ? ... posto se sad lomim ... dal' da uzmem astru ... il' da cekam ... cekaj :) kuva se kuva.... bichete obavesteni heh, vidim da si zagrejan za ovu temu, da ne znas jos i KOLIKO jos vremena ?? [ torbica @ 05.04.2001. 18:26 ] @
Citat: m r v a wrote: Citat: torbica wrote: Citat: m r v a wrote: a kad ce to ? ... posto se sad lomim ... dal' da uzmem astru ... il' da cekam ... cekaj ![]() kuva se kuva.... bichete obavesteni heh, vidim da si zagrejan za ovu temu, da ne znas jos i KOLIKO jos vremena ?? 30 dana [ m r v a @ 05.04.2001. 19:46 ] @
lol
yebo si mu kevu po quote-u :P btw ... a mozes biti malo odredjeniji... sta to treba da se pojavi za trijes' dana ... ??? btw x2 ... el' neko cuo da ye u Nisu pocelo experimentalno uvodjenje Cable I-neta??? ... E BRE !!! yuzna pruga ima .....a bg qrac !!! [ torbica @ 05.04.2001. 20:04 ] @
Citat: m r v a wrote: lol yebo si mu kevu po quote-u :P btw ... a mozes biti malo odredjeniji... sta to treba da se pojavi za trijes' dana ... ??? btw x2 ... el' neko cuo da ye u Nisu pocelo experimentalno uvodjenje Cable I-neta??? ... E BRE !!! yuzna pruga ima .....a bg qrac !!! dedicated downlink a cable net se trudi telefonija da izvede ali sve je to DZABA zbog malog Yu linka ka spola i poprecnih veza vidi INTERNET I WIRELESS diskusiju [ PsYhO @ 06.04.2001. 06:46 ] @
Pricao sam sa jednim covekom u vezi tih stvari,i on ce za tehnikom da uradi BEZICNI NET,a za njega ce trebati da se kupi neka kartica koju je on patentirao,i jeftinija je od modema.
I isto da uradi za tehnikom KABLOVSKI NET!!!!! Bila je diskusija na inteliju oko kablovskog,i on ce biti uveden!A sponzorisa ce ga technikom... A sto se tice astre.....to je zivo s*****...Kad pada kisha{A tada su svi za kompom},sem kad pada sneg{tad je Gojko u planini} onda je veza s*****,dodje ti veza da se nakacis preko obicnog modema.....cak je i 14400 brze...... tako da SVI SE STRPITE,PA DA UVODIMO KABLOVSKI.................. [ m r v a @ 06.04.2001. 16:27 ] @
daj boze.......
samo kad ce to sa tehnicom-om ?? [ torbica @ 06.04.2001. 18:24 ] @
MA MOZE KO GOD OCE DA PRAVI CABLE I WIRELESS KAD SU IM LINKOVI ZAKUCANI
preprodaju svoje prezagusene linkove [ Gojko Vujovic @ 06.04.2001. 18:27 ] @
To je tacno..
Eh sto bi nam dobro doslo da nas povezu na kpnquest-ov 2.5Gbit/sec backbone.. Makar sa 155Mbit/sec.. [ pantelija @ 21.04.2001. 22:24 ] @
Citat: PsYhO wrote: Pricao sam sa jednim covekom u vezi tih stvari,i on ce za tehnikom da uradi BEZICNI NET,a za njega ce trebati da se kupi neka kartica koju je on patentirao,i jeftinija je od modema. I isto da uradi za tehnikom KABLOVSKI NET!!!!! Bila je diskusija na inteliju oko kablovskog,i on ce biti uveden!A sponzorisa ce ga technikom... A sto se tice astre.....to je zivo s*****...Kad pada kisha{A tada su svi za kompom},sem kad pada sneg{tad je Gojko u planini} onda je veza s*****,dodje ti veza da se nakacis preko obicnog modema.....cak je i 14400 brze...... tako da SVI SE STRPITE,PA DA UVODIMO KABLOVSKI.................. tehnicom? ma daj jedva odrzavaju i ovaj dial up chak i vishe nove naloge neotvaraju u cilju "boljeg pruzanja internet servisa vec postojecim korisnicima..." koga li oni farbaju... ![]() [ MoHicAn @ 21.04.2001. 22:53 ] @
Citat: torbica wrote: Citat: agentsmith wrote: Trebao bi InterPacket isto da pochne nesto. Prichao sam sa ortakom iz Londona koji shljaka tamo. EON sucks interpacket je imao enduser system ali su ga popunili a izuzetno su kvalitetni... evo njihove cene, al da Vam ne pozli Below are some examples for the simplex configurations: 128K dedicated = US$ 1,150 per month CIR 128K burstable 256K = US$ 1,265 per month 256K dedicated = US$ 2,178 per month CIR 256 burstable 512 = uS$ 2,396 per month 512 dedicated = uS$ 3,850 per month CIR 512 burstable 1Mb = uS$ 4,235 per month Activation fee: 1,500 US$ Equipment and shipping: 2,000 US$ The equipment includes a DVB satellite receiver, the LNB and the IFL cable. The prices are based on a two year contract and are valid for one month from today </font> AAAAAAAA bre si ti lood pa za te pare uvedem si poprecnu do ko kog god oces providera ...... i to mi 10X brze sljaka nego ovo so si ti dao .......... !!!!!!!!!!!!! [ Borko Savic @ 22.04.2001. 10:09 ] @
Citat: m r v a wrote: el' neko cuo da ye u Nisu pocelo experimentalno uvodjenje Cable I-neta??? ... E BRE !!! yuzna pruga ima .....a bg qrac !!! Ja znam da u Subotici to postoji vec dosta dugo. Znachi i severna pruga ima.....a bg qrac !!! [ emtyy^^2004 @ 24.03.2006. 18:10 ] @
Ovako ne znam dali je tesko pitanje ali sam cuo ovamo od momaka i od ljudi da ima program koji 7-puta uvecava brzinu interneta,meni je modemski internet ono normalni 46.6 ali bih voleo ako vec postoi taj program da mi neko kaze download adresu ili link na ovo sajt to bi me mnogo spasilo!!!!!
Unapred Hvala!!!! [ Pharos @ 24.03.2006. 19:59 ] @
Ima, ima... Sa modemom dostižeš T1, kad već ne može T3 :D
[ emtyy^^2004 @ 25.03.2006. 14:22 ] @
Aha bas mi je drago da ima vec taj program nego ja samo ne znam i nerazumem tebe sta znaci T1 odnosno T3 nego dali mozes ti meni da posaljes instalaciju ili link download da ja skinem taj program..ok
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