Recently, the ADSL cat was broken by lightning, and the result of telecommunications came to change the cat, and did not complete the problem. Try to try it, the cross-line is done, it is unstable, inexplicably very good! Later, I didn't help any help? However, I have been more suitable for beginner network management personnel, posted. In addition, it is recommended that everyone is better in Tianyin. It is best not to go online, especially the high-rise office building, the place of the window, of course, there is corresponding measures are not afraid of these! Ah!
ADSL external Modem installation
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We use the famous ECI product Hi_FOCUS external ADSL Modem as an example, and the shape will look down below. The apparatus includes an ADSL MODEM and a small volume filter separator (not included in the figure). First, the computer must have a NIC (10M, 100M), and prepare 2 100M standard local area network twisted pair (ie, cross-network cable). Use the ADSL-containing telephone line to access the telephone line of the filter separator, connect the ordinary telephone to the Phone interface, the phone is completely used as the ordinary phone, and does not need to be powered by most ISDN devices to use phone. Connect to the ADSL Modem's ADSL interface from the Filter Separator's MODEM interface, and another network cable connects the network card and the 10baset interface of the ADSL MODEM, and the product of ECI supports the ATM network card; if yours The ISP provides an ATM method to connect to the computer's ATM network card with the ATM network cable, and finally the power supply.
There are 5 indicators on ADSL Modem, followed by: ADSL, 10BASET, ATM25, MAINT, POWER. Signals through these indicators We can understand the working conditions of ADSL. The ADSL lamp is often bright. Representing the ADSL network signal that does not detect the ISP is faulty; the ADSL lamp green flash represents the network signal and is synchronizing with the ISP network; the green is normal is the normal ADSL network. And it is ready to use it to the user. The 10BaseT lamp does not illuminate the connection with the LAN card without the normal work or no connection network card. Evergreen means working properly, flashing on behalf of the ADSL MODEM and NIC data is being transmitted; the ATM25 lamp signal meanings is similar. MAINT represents the control maintenance signal in the ADSL signal. Power doesn't have to say more, and whether it is energized.
Due to the complexity of the ADSL itself, it is superimposed on high-frequency digital signal on the baseband of ordinary telephone lines, so the addition of any equipment in connection from telephone companies to ADSL filter separators will endanger data normal transmission, Therefore, do not call the device, telephone anti-theft, etc. before filtering separators. The installation diagram is shown below. If you need access to the local area network to provide a shared Internet service, you only need to connect the 10BASET interface of the ADSL MODEM to the network switch or an interface of the hub. The installation of this hardware part is completed.
Here we also need to pay attention to the following points (Note: Most ADSL MODEM, please refer to the usage manual)
When ADSL Modem is connected to 10M or 10 / 100M network card, use 100M standard production network cable (cross-network cable)
When ADSL MODEM is connected to 100M network card, it will not work.
When the ADSL MODEM is connected to the 10M hub / switch, use 10M standard production network cable (direct connection network cable)
When ADSL Modem and 100M hub / switch connection is used for most of the local area network sharing Internet access, it will not work, and part of the 10 / 100M adaptive hub / switch does not switch to 10M speed, and cannot work.
