How to install broadband in school dormitory?

1, you can apply for mobile, netcom and telecom operators without telephone line interface. Moreover, with the permission of the school, the installer can install broadband in the dormitory.

2. When the master pulls the network cable and the light cat, if you want to use the wireless network, you need to buy your own wireless router to install it. After installing the wireless network, everyone in the dormitory can use it.

Extended data:

1. Users only need to carry the ID card and photocopy of the owner of the collection phone, and the ID card and photocopy of the handler when going through the formalities of accessing the network or changing.

2. When filling in the business application form, fill in the user application form in standard font with neat font and clear handwriting.

3. In order to ensure timely installation, it is recommended to fill in the contact number when handling business, and leave more than two contact information that can be found at any time, so as to install the machine at home in the shortest time.

4. After the business application formalities are completed, the company will open ADSL business within 2 working days.

5. If it is not installed within one month from the date of filling in the application form, it will be deemed as automatic disassembly. If necessary, please go to the business window again.

6. If the terminal equipment is rented by the communication company for free, the property right of the equipment still belongs to the communication company, and the user needs to return the terminal intact after disassembling it.

principle

The traditional telephone line system uses the low frequency part of copper wire (frequency band below 4kHz). ADSL adopts DMT (Discrete Multi-tone) technology, which divides the frequency band from 0 khz to 1. 1MHz of the original telephone line into 256 subbands with a bandwidth of 4.3khz.

Among them, people in the frequency band below 4khz are used to transmit POTS (traditional telephone service), the frequency band from 20KhZ to 138KhZ is used to transmit uplink signals, and the frequency band from 138KhZ to 1. 1MHZ is used to transmit downlink signals.

DMT technology can adjust the number of bits modulated on each channel according to the situation of the line, thus making full use of the line. Generally speaking, the greater the signal-to-noise ratio of subchannels, the more bits are modulated on the channel. If the signal-to-noise ratio of a subchannel is poor, it will be discarded. ADSL can reach the data transmission rate of 640kbps upstream and 8Mbps downstream.

As can be seen from the above, for the original telephone signal, the original frequency band is still used, while the ADSL-based service uses the frequency band other than telephone voice. Therefore, the original telephone service is not affected.

Reference source: Baidu Encyclopedia-Broadband