测速ADSL测速,加速,检测,故障[1]（ADSL measurement speed, acceleration, detection, failure [1]）

ADSL测速,加速,检测,故障[1] ADSL measurement speed,acceleration, detection, failure [1] 

ADSL is a high-speed broadband Internet access on the originaltelephone line. It has the advantages of saving investment,fast Internet access and simple installation. At present, manylocal areanetworks, especially Internet cafes, use this method.So, can the Internet speed reach the speed that ISP serviceproviders call it? How can we further improve the speed ofInternet access? How can you tell if ADSL works? How to findand solve the problem of Internet trouble? Let' s talk aboutthese issues.

First, broadband in the end "how wide?""

For example, broadband access providers promise 1M bandwidth,that can reach 1M? To verify its authenticity, of course, itmust be tested. But because of many factors affecting testresults, for ADSL users, the main aging degree, telephone lineusers to the telecommunication room distance, computerconf iguration and the connected web server performance, accessserver number and so on; for LAN by the way of access users,there are several configuration, the user access network howmany, the server connection eff iciency, web server performanceetc. . In order to test the objectivity of the results, it isbest to select different periods of time formultiple tests anddraw an average figure.

1, use IE to download files, test speed

The easiest way to test this is to connect to the FTP download

service provided by the ISP. Download some of the larger fileswith IE to see the download speed. For example, I use the browserto connect the ISP FTP download file, the speed of about 70KBper second, equivalent to about 500kbps of the transmissionbandwidth, than the customer service staff said 1M half of thewhole difference. But the result is not always accurate. Themethod of downloading file tests with IE is simple, but the testresults are not very accurate. If you want to know more aboutyour network situation, it is better to use the two methodsdescribed below to test.

2, the website test speed

There are many sites that provide network speed tests, and whenthe speed of testing is slow, the site gets smaller values fortesting your network speed.

3, use special tools to test network speed

SpeedText is a free software, it can be used to connect a website or your server computer test speed, will result in the formof a histogram said: in the main interface of software "Server"column to fill in the URL, such as www. cntele.com, and thenenter the test results can be obtained. If you click the"Connect" button on the toolbar, you can also connect tests.If you want to compare the result with the standard speed,simply select the items in the menu "Compare", such as 786KB(DSL) , so that you' ll get a more intuitive result.

Two, ADSL network acceleration tools add fuel to the flames

Because the system parameters of Windows are set up for lowspeed access, there is no problem with using Modem. However,when using ADSL, the speed has been greatly improved, and theWindows system parameters have not been changed, so that it cannot adapt to the data transmission of ADSL access. What we needto do is to change the TCP/IP default parameters set in theregistry for "low speed" access, so as to improve the speed ofbroadband Internet access.

Manual modification of the registry, it is not "rookie" can do.Here you recommend the use of software to automatically modify,in this regard, quite mature tools, there are two models: ADSL,overclocking, Raiders, and network hurricane.

(I) ADSL overclocking

"ADSL overclocking Raiders" is designed for ADSL, by modifyingthe PC system registry, originally configured for low-speedaccess and set the default parameters of TCP/IP, to adapt tothe PPPoE ADSL access.

After the software is run, the main interface is shown in Figure4, and click the "ADSL overclocking" button on the left,Then click the "ordinary overclocking" button to restart thecomputer after the accelerated effect; or click the advancedbutton, enter the "overclocking" senior overclocking "page,click on the" start networking state checkMTU value", completethe inspection will check the pop-up dialog box shows success.Then click on the "advanced overclocking" button, restart thecomputer and then accelerate the entry into force. It should

be noted that the software will modify many places in theregistry, although there is a system recovery function, butstill remind you to use before backing up the registry.After overclocking, I downloaded more than 200KB/s on theInternet, and solved the problem of stagnation, although itdidn't double as the software authors say, but it was great.Friends using ADSL might as well try.

But the software is only suitable for the ADSL line PPPoE, notsuitable for other dial-up and ADSL PPPoA, the popular ADSLInternet software is basically PPPoE, such as Enternet,RasPPPoE, WinPoET 300.

(two) network storm (NetSpeeder) ;

"Hurricane" is also a veryuseful tool for network acceleration!Use the"auto set Netspeederwizardrecommended to speedup yournetwork easily, and the optimization effect to test andcompared before and after the application of network softwarefor" speed test "function. Netspeeder can fundamentallyincrease the download speed for various types of networkconnections (DSL, fiber optic cable, wireless) . The DNSaccelerator updates the host name and IP address based on theIE favorites and history to increase the speed of connectingcommon sites.

Optimize the actual combat: NetSpeeder after running the maininterface, its use is simple (wizard way) and complex (handmode) .

1, automatic optimization

Using the optimizer wizard, you can easily optimize yournetwork. Click on the left side of the main interface of the"Wizard"button, and then click"next", then you choose the typeof network connection: Modem dial-up connection, ADSLconnection or Cable Modem connection, I use a ADSL connection,itwill be"ADSL connection" is selected, andthenclick"next",select "the network interface in the pop-up dialog box, theparameter must be set, this is because of the differentinterface MTU will be stored in different parts of the Windowsregistry, if you do not know the next port, select all ports"option, click "next", then click "finish" button. This set ofoptimized parameters will be saved to the registry. Afterrestarting the system, you will find that the network speed hasbeen greatly improved. What? Don' t you believe it? Then clickon the "speed test" button to test the download speed, andyou' ll see the optimization effect immediately!

2, manual optimization

If you have a good understanding of the TCP/IP parameters, youcan also use manual optimization to set the specificoptimization parameters, in accordance with local conditions,of course, there will be better optimization results.Click on the main interface of the "fine-tuning" button pop-updialog box, select the optimized interface in the "interface"column in the "MTU" column can choose a predefined value fromthe drop-down list, such as "1492--recommended ADSL, or clickthe MTU button to detect, the software will automatically find

the optimal location from Internet MTU. Of course, you can alsoselect the customize item from the drop-down list, and then youcan set the parameter value yourself.

The recommended value of MTU for dial-up is 576, so the MTU probewill specify the value of the Internet location to be 576 orless. If it is ADSL, then the recommended value is 1497 or less,and the recommended value of the fiber optic modem or LAN is1500 or less.

Next, set "TCP Receive Window", that is, the size of the TCPreceive packet.

It' s best to set it up to an even number of more efficient MSSrecommended by the software (such as: 2x, 4x, 8x) . In general,larger receive values can better improve their potentialperformance and gain higher network bandwidth, and therecommended values for general software are MSS *44* scaling

4.

Finally, the "Time To Live", which is the "lifetime",determines the maximum number of times the IP packets are storedon the net that fail to reach the destination. This is a validdividing line to determine the number of routers that IPpacketscan pass without dropping. Because the Internet is expanding,the recommended parameter is 128. General TTL values are lessthan 128, but if you set the parameter is 0, then you can notconnect to the network.

When all settings are complete, click the "apply" button torestart your computer, and then enjoy faster Internet speeds.

3, DNS accelerator

The DNS accelerator accelerates by converting the host name ofthe Internet into an IP address. Click the "DNS accelerator"pop-up dialog box, click the "add" button, you can increase thehost name, click "modify", "parse" button, you can correct it.If you browse the web through IE, Netspeeder also automaticallygets the host name from the favorites and history and adds itto the DNS accelerator. If you want the function, please click"Settings" tab, and then in the pop-up window will enable "DNSoptimization" and "automatically increase the host name fromIE history" and "automatically increase the host name from IEfavorites" option can be selected.

You need to set the "record number", this is because we choseto add a site from IE favorites and history, Netspeeder willcontinue to add a site to the DNS accelerator list, in ordernot to increase the amount of data is only the best to youfrequently visit the site added in the list. Finally, do notforget to set the "update frequency", usually 5 days can beused.

According to my test, after using Netspeeder to optimize thenetwork, broadband (fiber optic modem and ADSL) speed increasedby 2 times, and ordinary dial-up Internet access can basicallyspeed up about 1 times.

Three 、 ADSL troubleshooting and troubleshooting

ADSL Internet more faults (compared with LAN after allincreased ADSL equipment, plus the phone connection is improper,problems is also normal) , troubleshooting method here foreveryone to talk about ADSL fault.

1. factors causing ADSL failure

The common hardware failures of ADSL are the problems of loosejoint, broken cable, hub damage and computer system failure.You can usually help locate by observing the light.

In addition, abnormal voltage, high temperature, lightning andso on are also likely to cause trouble. Voltage instability isbest for Modem with small power UPS, Modem should keep dry,ventilated, avoid water drench, keep clean. In case ofthunderstorms, be sure to unplug the Modem power and allconnections. Line distance is too long, the line quality is bad,the connection is not reasonable, is also causes the ADSL notto use normally the reason.

2. method for finding ADSL fault

Fault location ADSL requires some experience, the generalprinciple is: pay attention to lights and error information,after the first hardware software, internal external, firstlocal network, try after the host client, full inspection afterthe declaration. Failure reporting should be accurate andconcise, and the problems encountered should be correspondedto the faults mentioned in the user' s manual. When reportinga failure to the engine room, the port number and user nameshould be reported first according to the user' s manual. For

frequent failures, the user shall keep a record of them andrefer them to them at the time of filing.

(1) check whether the power indicator is normal

The power indicator lamp is located at the left of the 3indicating lights of the user Modem, and continues to be litas normal. If the power indicator is not on, the user can solvethe power problem by himself.

(2) whether the data indicator is normal

The data indicator on the user Modem 3 lights on the two on theright, a continuous light is normal, indicating that the userend to end DSLAM line without fault: if the light is not on thatline there is a problem required by the scene to solve thetelecommunications sector.

(3) whether the user' s network card and cable are normalWhen the user PC network card is connected with the networkModem, the indicator light is shining, if the indicator lampis not normally shining, the user network card or the networkcable is faulty.

(4) check the ADSL, Modem, and NIC IP settings

Set the wrong ADSL Modem address of IP or the wrong setting ofthe DNS server. Because for ADSL virtual dial-up users, thereis no need to set the IP address, automatic allocation can be.TCP/IP gateways generally do not need to be set up. In addition