What are regular phone cables made out of and how do they work? At what speeds can they transmit data?
109358
Q: What are regular phone cables made out of?\n\nA: Copper usually, though I've seen Alum.\n\nQ: How do they work?\n\nA: Odd, question. They don't do any work per se, they just pass a signal from one end to the other....\n\nQ: At what speeds can they transmit data?\n\nA: In the US, regulations limit the transfer rate to 48kb/sec.  I've no idea what the max is for Unshielded Twisted Pair.  Most dial-up modems claim a 56kb/sec transfer rate, but you could only get that speed on the internet, outside the US. The phone company in the US is only OBLIGATED to provide 2400bp/sec or 2.4kb/sec....I get about 45kbp/sec from my home.\n\nhope this helps !
279595
First things first, do you know it is the right kind of file for your phone. If it is a .jar then you are probably ok. But you must have the right equipment, usually a cord sold seperately from your phone. E-bay is a good place to get these because they tend to be very expensive retail. Another possibility is wireless RF. If your phone has a RF transmitter (consult your manual) and your computer does to, then you can simply download the connectivity program from your phone manufacturer web site and set the phone RF facing the computer RF to connect them.
1099266
The points made by the previous responders are reasonable. In the context of communication, speed more often means bits per unit time, rather than physical speed which is distance per unit time. Electricity does travel very fast in the *latter sense*, close to the speed of light - but what is it about an electrical circuit which limits the number of bits which can be transmitted per second?\n\nSuppose you tried to send information by switching on and off the power to an electric fan being observed by someone else. It takes five or ten seconds for the fan to slow down or regain normal speed after it's been switched off or on, so it would be impossible to communicate much more than 3 or 4 bits per minute reliably using such a system. If you tried to do it faster there would be no change observable at the other end.\n\nThere's a similar limitation for any pair of copper wires. If L is the inductance and R the resistance, it takes a time roughly t ~ L/R for the current to drop at one end when the voltage has been switched off at the other end. The magnetic field surrounding the wires keeps the current going just like the momentum of the fan blades.\n\nThere's nothing much that can be done about this except for changing the structure of the cable. For example the pair of copper wires can be replaced by a coaxial cable in which one conductor forms a cylinder surrounding the other. The magnetic fields produced by the two currents tend to cancel which substantially reduces the inductance L, allowing a much faster (bits/second) speed.\n\nWhen most of the telephone network was implemented there was no reason to use coax since a pair of copper wires works fine for voice (audio frequencies = roughly 10K-100K bit/sec), although these will probably be upgraded if the phone companies are allowed to compete with the cable companies. \n\nFiber optic cable also has a very high bandwidth (bits/second) ... but your question is specifically about electricity.
252949
It's basically one way to encapsulate data.  If you send a 1 MB transmission it is chopped into smaller bits so that it can be sent efficiently.  One way to do this is frame relay, another way is ATM.
211495
It's an old fashioned kind of modem, common in the 70s and early 80s, which was connected to a phone by placing the phone handset onto the unit, which had a cradle to hold it and two rubber cups for the earpiece and microphone.  Data was sent via audio signals through the handset.  \n\nNeedless to say, data was sent much slower than we're used to today.  Top speed was, IIRC, about 300 baud.
522225
Polyethylene is commonly used, sometimes "foamed" to lower the loss factor.\n\nThe best cable employs Teflon.\n\nHigh power transmitting cables have a minimum number of discrete spacers to maintain the geometry.
997345
simple you could use the bluetooth ..... facility... you get a bluetooth dongle which is attached to the computer and you can send the desired file from the computer to you cell phone....\n\nyou could also use the infrared facility which i comparitively slow to the bluetooth one... but the impotant thing is that you can transfer files .... ( pictures, games, wallpapers, softwares and lots more )
919740
In general the shielding of a cable (or electronic cct.) is metallic covering to protect against undesired signals from outside which may affect the performance of the device or the system.\nShielding mainly used in communication cct's , tuners , alarm system cct's and any application may affect or disturbed by the signals in the neighbor.\nthere are many types of shielding depending on the application:for cables we may find the mesh shield , aluminum sheath shielding, and other. For electronic cct shielding it is usually a metallic enclosure containing the cct.\none other thing, that some applications or devices during normal operation generating a high frequency signals with high power ,these devices must be shielded to prevent these signals from spreading outside.\nat last : ANY SHIELD FOR ANY APPLICATION MUST BE CONNECTED TO EARTH (MUST BE GROUNDED PROPERLY).
502977
u can use a dsl spiltter which is normally avaiable in DIY store. It basically spilt the phone line into two wave where u go use your dsl as well as your phone at the same time. But take note that the moment u use the phone, ur speed of DSL will reduce by a third of it normal speed!
225165
The first thing that you really need to pay attention to is the dynamics of the wire itself and not the physical size.  Your statement is very bias as I could say that why do fiber optic lines tranmit so quickly and the wire holding up the golden gate bridge is not quicker???\nThe quickest and best answer unless you have degrees in physics is the density of the fibers.  It all comes down to density and a mirid of other factors, but density is the key my friend.\n\nHappy conducting my fiber friend!
713230
These were laid in much the same manner as telephone  & telegraph cables were in the late 19th and early 20th century. By ship. Huge reels of cable were hoisted on to specially built ships. As the ship moved forward the cable was paid out through a hole in the keel. As each reel emptied a new one  was spliced on. When the last reel was being used another cable ship came along side and the end was passed over for splicing.
570316
10 years- fiber optic?  not yet.  Power cables will be the supply of telecommunications.  the power we currently get runs between 1-60Hz... yet the cables are so wide they can handle well into the Tera-hertz.  Com ed is already experimenting on multiplexing signals to bring voice, TV, and data to... EVERYWHERE!  The power grid encompasses everything and has NO ZONING!  You would travel with a small lightweight access box... plug into the wall... an ethernet cable to the lap top... and voila!  your on YOUR internet and phone account EVERYWHERE you go.  The lines are already laid which means the system is ready to go.  fiber cables still have to be laid all over and run to each and every home and business.\n\n20 years- fiber?  maybe.  its important to remember that there isnt a single technology that utilizes fiber to its full capacity.  how do we know?  because we dont know the maximum bandwidth of fiber cables.\n\n30 years- fiber?  probably.  at this point we should have wireless access everywhere, internet on our wrist watch, and TV streamed directly to our brain by the Motorola/AT&T/Coca-Cola/Chinese Government/ABC-TimeWarner conglomeration.  oh dont forget the TIVO add-on shoe sole insert.
347624
Serial ATA.  It has an actual data transfer rate of 1.2 gigabits per second (Gbit/s), or 150 megabytes per second.\n\nMuch better than the standard ATA parallel cables.\n\nhttp://en.wikipedia.org/wiki/SATA
395258
From ur question i understood that u want to send images to ur phone from pc.. u can use a datacable for that purpose. or u can use bluetooth or infrared for that but ur pc and phone support that. transfering thru datacable will be much fast than other two methods.
1184495
agere is a hardware comany, and the item you've mentioned is a voice madem.. ie its a dial up modem which connects you to the internet using a simple telephone line at speed not more than 56kbps. Its a rarely used device in todays scenario of Broadband and WI FI
839519
Hello,\nThe firewire's speed is 3.2 Gigabytes per second. It has a 6 pin connector, it is a type IEEE 1394 cable, and it can have a maximum of 63 devices connected at 1 time. The Firewire's maximum cable length is 328 feet.
667099
You can either use a phone-to-PC USB data cable to transfer picture files in your PC to your phone (You may need an interface software, which may come bundled with your phone or can be downloaded from the manufacturer's website).\n\nThe other way is to browse the internet using your mobile phone, which may not work with all phones and service providers (You require a GPRS-capable phone and a service provider who provides GPRS connectivity).