telephone set - line networking is one of several means to connect the electronic computer in your base . If your calculator are in different rooms , then phone - line of work networking could be a good solvent for you .
Be sure to readHow Home Networking Works , which supply information about configure your computers , routersandfirewalls , Ethernet networking and sharing an Internet association . There are also articles aboutpower - melodic phrase networkingandwireless networking . By the time you wind up this series of article , you ’ll be able to select a web engineering science that suits your needs and then configure the whole matter !
In this clause , we ’ll talk about phone - blood line networking and the engineering used to make it bump . We ’ll also discuss the reward and disadvantages of using a headphone - business web .
Phone-line Networking
sound - line networking is easy to establish , inexpensive and fast , and it does n’t ask any extra wiring .
headphone - blood line networking , most commonly referred to as HomePNA , is based on the specification get by theHome Phone Networking Alliance(HPNA ) . The HPNA is a consortium of key networking technology companies that create a phone - line standard for the networking industry . HPNA 1.0 , the original edition of the banner , control at a rather slow 1 megabit per 2d ( Mbps ) . The current specification , HPNA 3.0 , is found on technology developed by Broadcom and Copper Solutions . It run at 128 Mbps .
HomePNA has several trenchant advantages :
HomePNA does have some drawbacks , though . You need a phone jack nigh to each computer . Otherwise , you will have to run phone wing cords or install new wiring . There is a forcible bound of 1,000 pes ( 304.8 m ) of wiring between devices , and the overall arena of reportage should not exceed 10,000 straight feet ( 929 m2 ) . seldom ( in few than 1 percent of U.S. homes ) , HomePNA will not work on the be wiring . And while this generator did not notice any interference with voice purpose , there have been reports of voices sounding " rum " or of a lot of noise on the phone once HomePNA is installed . Later , we will look at these issues and possible solutions .
If you mean that phone - line networking is intricate and telling , then flick here to see howwireless mesh networkswork .
HomePNA Technology
HomePNA uses a method known asfrequency - division multiplexing ( FDM ) . FDM puts computer information on freestanding frequencies from the vocalism signal being carry by thephoneline . FDM separates the extra signal space on a distinctive phone furrow into distinct information channels by part it into uniform chunks of bandwidth . To better understand FDM , think of radio stations – each station sends its sign at a different absolute frequency within the useable band .
In HomePNA , voice and data travel on the same wires without intervene with each other . In fact , a stock telephone line of descent has enough room to brook voice , a high - speedDSLmodem and a habitation phone - line electronic connection .
Two custom chips design using the HPNA specification were develop by Broadcom and make up the gist of the HomePNA wit ’s architecture :
The humble 4100 chip on the left acts as a transceiver between the larger chip and the sign being welcome over the speech sound line from another figurer . It can send and pick up signaling over 1,000 ft ( 305 yard ) on a distinctive speech sound strain . Think of it as an interpreter , translating the analog messages it gets from the earphone line into a digital format that the PCI / MSI restrainer chip can read . The 4100 does not seek to translate what it interprets , it just send it along .
Since many phone lines in be homes vary greatly in length and signal quality , the larger 4210 comptroller scrap on the right has to be able to adjust to a variety of challenge . Because the 4210 does this so well , the HPNA count on that more than 99 percent of U.S. homes have earphone wiring that can support HomePNA . Basically , it works this way : First , the controller chip takes the unfiltered subject matter it receives from the small chip and strips away all the randomness . It then adopt what is left and pass it on to the estimator for processing . Once the computer processes the information , it retort an cite to the sending reckoner so it knows that the data point was receive . This bump yard of times each second as the computers intercommunicate .
In the next department , we ’ll discuss set up HomePNA and some of the problems you might face .
How to Install HomePNA
If you decide that HomePNA is best for you , here are the basic step :
There are a few things you should keep in mind when you countersink up a HomePNA web . First , most analog communicating devices , such as telephones and fax machines , produce signal noise . conceive of signal noise as rubble on a major main road . A little debris in all probability wo n’t affect dealings , but a hatful of it could slow down or even finish traffic in one or more lanes . If you install a HomePNA meshing and your figurer have trouble communicating , try insert a low - fling filter between any phones or fax machine and their respective jak . The low - straits filter will block noise without impede the performance of your facsimile machine or phone . you’re able to find these filters at most electronics stores .
Also , electrical playing area generated by powered communicating gimmick , such as cordless phones or fax automobile , can enter another eccentric of signal stochasticity . A unlike eccentric of low - pass filter , insert between the electric rampart outlet and the power electric cord for the twist , can deposit this problem .
The last likely issue is rarefied but much harder to fix . If you have a very turgid menage , or one that has been revive several time , you may have too much wiring between computing equipment . All of this wiring will weaken the signal , get it to fade out and turn a loss strength . The result is that not enough of the signal rest if and when it reaches the other computer for that simple machine to action it . If this is the case , then you will either have to move the computers closer together or redo the wiring , at which gunpoint you may require to consider learning aboutwireless networking .
Many family computer users will bump that link estimator through their phone lines is a unspoilt solution , but there are still two other networking engineering science to hash out : power - short letter and wireless connection . For information on these networking technology , and to watch more about phone - production line networks , check out the link on the next page .
