Modem common faults Modem can not dial to deal with the fault phenomenon Internet access is too difficult. The modem was easy to use a few days ago. One day, I stopped dialing, and judging from the indicator light, there is no data exchange between the modem and the computer, and it is not easy to use after antivirus. Failure analysis and treatment There are many reasons why the modem cannot dial. From the above analysis, there is no data exchange between the modem and the computer. It is likely that it is a serial port or connection problem. First, change a good connection to see if it can be restored. If the fault persists, check the settings in CMOS to see if the COM port is opened, the address is the same as that in Windows, and the type of the serial port (HPSIR ASKIR NORMAL), generally set to "NORMAL", set to "HPSIR" Or "ASKIR" may be abnormal. Handling the phenomenon of abnormal modem dialing There are two US RoboTIcs Modem Sportster 28800, which does not work normally under the Internet under Windows 98, and rarely can be dialed. The phenomenon is: it stops working after the dialing beep is completed, and sometimes automatically disconnects within about 1 minute after connecting. However, another 14.4kB Modem must be tested with the "Other Information" item in Modem Diagnostics before dialing, otherwise there is no response, and the above phenomenon does not exist at all with Hays Modem. Failure analysis and treatment For the US RoboTIcs modem, I do n’t know if the driver is the driver that comes with the Windows 98 system, or there is a driver disk. If there is a driver disk, it is best to use the driver disk to install it (because the hardware is developing fast now, The various drivers that come with Windows 98 have proved to be inadequate to provide support.) Otherwise, you can try several US RoboTIcs drivers. If the effect is not good enough, you can try to reduce the communication rate. To ensure that the transmission rate of the communication port of the computer is coordinated (this is very effective for the case where the computer speed is slow, because it is considered as appropriate according to the configuration of the personal computer), and select the "only use this rate link" item. I do n’t know if your modem supports hardware flow control (check whether the V.42 and V.42bis protocols are supported in the manual). If it does not, please double-click the “modem†icon in the “Control Panel†and click the modem in the list. , Click the "Properties" button, click the "Links" tab, and then click the "Advanced" button to clear the "Use Flow Control" item. Of course, it is necessary to first check whether the communication port, I / O address, and IRQ settings are correct. It may be that the initial (dial-up) string of the modem is incorrect, so it has to be re-initialized through "diagnosis" every time it is dialed. Since the specific brand and model of the modem is not specified, it is estimated that it is due to the selection of a driver for a compatible brand of modem. Try to use another driver, or simply choose the "standard modem" in Windows 98 system, this may be a loss of functionality, but its compatibility is beyond doubt. As for the Hays modem, this phenomenon is of course, because other products can be said to be compatible brands, which is also the reason for its high price. Linking two computer faults via telephone line Both computers are installed with Chinese Windows 98 and modem. The two computers often need to exchange files, but the two computers are far away from each other and cannot be realized by floppy disk. Failure analysis and treatment If you have ever been to BBS, it is not difficult to solve this problem. The connection between the two computers can be achieved by using Telix, the terminal emulation terminal under Chinese Windows 98, etc., and files can be transferred at the same time. The specific operations are as follows: (1) First, install the modem on the two computers, pay attention to the installed port, usually COM2. (2) Set the communication port (such as COM2) and communication rate (such as 14400bps) in Telix and other software. (3) Set the file path for upload and download. (4) Dial through AT command or dial command to establish a link between two computers. Network card failure phenomenon not found in Windows 98 A 5X86 / 133 microcomputer, ALD5400 motherboard, 16MB EDO memory, Quantum 640MB hard drive, the motherboard BIOS uses AMIBIOS 1992 version, install NE2000 compatible network card. When searching for new hardware in Windows 98, it was reported that the network card was not found. Then use the Windows 98 driver that comes with the card to install it. After restarting, it reports that the network adapter does not exist, but the same network card is installed on the other two PenTIum 133 computers without any problems. Failure analysis and treatment Check the network card manual, the default setting of the network card is "no jumper / plug and play" mode, and the 486 motherboard does not support plug and play, so set the network card to "manual jumper adjustment" mode, and view the manual, Set the IRQ and I / O values ​​of the network card to 15 and 300 ~ 31FH. Reboot, search for new hardware, report that NE2000 compatible network card is found, and the corresponding protocol and driver are automatically installed (the driver that comes with the card can also be installed), everything is normal when used. To realize the plug and play function, you must have a motherboard that supports Plug and Play BIOS and an operating system that supports Plug and Play (such as Windows 9x or OS / 2 WARP), of which the more important is the BIOS of the motherboard, which is responsible for Allocate resources to the hardware to avoid conflicts. On non-Plug and Play motherboards, Windows 9x may not recognize the network card because the BIOS does not allocate resources to the hardware. At this time, consider setting the network card to "manual jumper adjustment" mode. Network card working abnormally in Windows 98 After installing the network card, manually set the IRQ and I / O values ​​to 3 and 200H ~ 220H, start the computer to enter Windows 98, and report that the network adapter is not working properly. Failure analysis and treatment Check the resource list, the original two values ​​are occupied by COM2 and sound card, there is a conflict. In Windows 98, cancel the automatic configuration, change the above two values ​​to 15 and 300H ~ 330H, restart the computer, and still report the abnormal operation, run the network card diagnostic disk, and find that the IRQ and I / O values ​​are still the values ​​before the change . Open the case and manually adjust the jumper to correspond to the changed value. Restart, everything is normal. When the network card is in the "manually adjust jumper" mode, not only should the value set not conflict with other devices, but also must correspond to the configuration in Windows 98, after the software configuration is changed, the corresponding jumper should also be changed . A special failure phenomenon when setting up a Windows 98 peer-to-peer network Three computers (two IBM 6x86 200 and one Pentium MMX 166) built a Windows 98 peer-to-peer network, the network uses a coaxial cable for bus link. The network card driver has been installed in the normal order and corresponding settings have been made. On the Windows 98 desktop, you can see the icon of "My Network Places", but when you enter "My Network Places", you can only see the machine name corresponding to this machine, but you can't find the other two machines. Failure analysis and treatment Check the network card and network cable: Since the three network cards are all from a computer in the Novell network, they have been running normally before, so there should be no problem. Only the network cable is newly made, but by further checking the lines and connectors and measuring with a multimeter, no bad contact or short circuit is found, and there is no sign of loosening of the T-head and the terminating resistor. Excluded hardware reasons. Check the input / output address (I / O address) and interrupt number (IRQ): From the Windows 98 desktop, enter "My Computer | Control Panel | System | Device Management | Network Adapter | NE2000 Compatible (Network Card Model) | Properties | Resources" In, check the input / output address and interrupt number of the network card, the system shows that the network card is operating normally, and there is no conflict between the address and interruption of other devices. Check the network settings: Right-click on the C or D drive from "My Computer" (the computers in this network all use the FAT32 partition table, and the hard disk is divided into C and D partitions), select "Share" and enter the "Share" "Settings screen, found that all the settings are correct. Then enter "My Computer | Control Panel | Network" to check that the network protocols and services required for networking are correct. In the "Identification" item, the settings of the computer name, workgroup, etc. are also correct. Check the CONFIG.SYS file: It is suspected that the number of drive letters required by the system is not enough. Then open CONFIG.SYS, add the line "Lastdrive = z", save and exit, restart the computer separately, and the fault remains the same. Reinstall the driver: The reinstall process is going smoothly, but it is still not normal. Can these network cards not be used in Windows 98? For this reason, I read through some materials and found that some materials pointed out: individual network cards must occupy IRQ3 to work properly. When installing these network cards, the IRQ given by the system is 3, because in the IBM PC, the system stipulates: IRQ3 is assigned to the COM port, and at that time, another free IRQ number was selected for the network card. Go to "My Computer | Control Panel | System | Device Management | Port", delete COM2, enter "My Computer | Control Panel | System | Device Management | Network Adapter | NE2000 Compatible | Properties | Resources", adjust IRQ If it is 3, the other two computers will follow suit, and then restart the computers separately. In "Network Neighborhood", all three computers can be seen. In Windows 98, more "plug and play" accessories are used, which makes installation easier. When installing some boss cards, try to use the IRQ number automatically given by the system. If there is a conflict with other devices, you can try to adjust other devices, so that the boss card installation may be smoother. Fiber Optic Cabinet is designed for a cross connection between telecom feeder cable and customer cable. It is normally in a floor-standing or occasionally wall-mounted way to be placed over the street serving as one of the optical nodes in access network. 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