Adsl falls involve multiple problems, including circuit failure (wire jamming), adsl modem failure (heat, mass, compatibility), network failure (low speed, old driver), etc. Operators and users should perform the following routine checks: the reliability of the adsl telephone connection: the distance from power lines and large power electronic equipment; the installation of telephone extensions, fax machines and billers between the adsl entry and separators: the correct installation of separators; the phasing out of the old isa card and the replacement of the pci card with 10/100m and the latest driver; the soundness of the adsl modem heat spread; and the normal state of the adsl modem light. The reasons for and treatment of the adsl disconnection are as follows: (1) landline quality issues. The pc must have good grounding. Otherwise, static power will affect the transmission rate of adsl and even cause a loss of course. In general, pcs should have less than 10 ground stoppages. In addition, the irregular distribution of power during construction, the absence or unsatisfactory quality of surface lines may also affect the normal use of network equipment and even the loss of lines, which should be overhauled in a timely manner. (2) lines have strong sources of interference. Strong signal jamming sources, such as radio transmitters, welders, trams or high-voltage electrical transformers, within 100 m of the user cable, which enable the user to receive impurities (the copper-packed steel line is weak and the signal is strong) and cause strong interference to the user line. Interrupted signals often enter through unblocked sub-lines, as relay cables have shielded layers with minimal interference impact, and use of some shielded sub-lines in high-intensity locations reduces the volatility or loss of speed caused by interference. In addition, the power lines cannot be parallel to the adsl line in case of interference leading to adsl failure. (3) the quality of the card is unstable. The failure is that the network will never be connected as soon as it is broken. The dsl lights of the user modem are frequently lit, largely defusing circuits, and most of the problems are on the card. If network lines, microphones and slots are excluded, they should be replaced in a timely manner, generally because of the precarious quality of the cards. (4) user lines are far away. The irregular breakout is mostly caused by poor quality or distance of the line, which can be used by the adsl tester to test the strength of signal decay and disturbance and to identify better route replacements. The general user trunking line should not exceed 5 km and the offline line for entering the user room from the branch box should not exceed 100 m. (5) access to the internet, but the telephone is offline. This is mostly due to the break-up of the inter-intersection sub-board card, which can be passed because of the close proximity of the break-through head and the end-board, while the voice cannot pass; if the user is close to the end of the bureau, the interior line mix can also cause the above-mentioned malfunction. (6) access to the internet and calls are inconsistent. Often external insulation is poor or contact is poor. The external line of the user's end is insulated, the phone handle is flashed as soon as the user reaches the internet, the wan light is extinguished and the failure is activated as soon as the external line is repaired. (7) callable, but offline. The general user failure is when the connection to modem is connected to a telephone, the phone functions and the internet is disconnected. The line light was not on. In case of failure, a close examination of the location of the connection used for the equipment should be conducted, with as few changes as possible at normal times in order to avoid a faulty connection. (8) wrong string ext. The incorrect stringing of the telephone extensions caused a series of disturbances and caused a distortion of internet-based data. If the telephone extensions are necessary, a separators should be attached。
