Shulou(Shulou.com)05/31 Report--

Audio commentary

Hello, everyone. The meeting will answer your questions. Broadband installed want to change the binding of the mobile phone number, broadband want to change a mobile phone number to bind this many people do not know, now let's take a look at it!

Answer:

1. If you need to change the mobile phone number used for binding broadband, it is recommended that the manager bring the ID card corresponding to the bound mobile phone number to the business hall of the operator for specific consultation. However, the mobile phone number to be replaced must be the mobile phone number of the same operator in the same region, and the ID card bound must be the same. If telecom broadband is available, the mobile phone numbers of China Mobile and China Unicom cannot be bound.

2. Introduction to Broadband:

3. In basic electronic and electronic communications, broadband is a method that uses multiple frequencies to send many electronic messages at the same time. It describes that a signal or electronic circuit contains or can handle a wide range of frequencies at the same time. Broadband is a relative description method. The larger the frequency range, that is, the higher the bandwidth, the more data can be sent. For example, in radio communication, the bandwidth with narrow frequency range can only send Morse code, and sending high-quality music needs more bandwidth; the broadband antenna of TV can receive a large number of channels. In terms of data transmission, telephone lines are also used as the medium of signal transmission, and optical cables are becoming more and more popular. Modems can only send 64Kbps data per second, and broadband ADSL and fiber optic Modem can provide higher transmission rates. According to a 2006 OECD report, any Internet connection whose transmission rate exceeds 256Kbps can be called broadband. FCC explained that any Internet connection with a transmission rate above 4Mbps can be called broadband; traditional telephone line systems use the low frequency part of copper wire (the frequency band below 4kHz), while ADSL uses DMT (distributed Multi-Audio) technology to divide the original telephone line from okHz to 1MHz into 256subbands with a bandwidth of 3khz. The frequency band below 4khz is used for transmitting POTS (traditional telephone service), the 20KhZ to 138KhZ frequency band is used for transmitting uplink signal, and the 138KhZ to 1MHZ frequency band is used for transmitting downlink signal. DMT technology can adjust the number of bits modulated on each channel according to the situation of the line, so as to make full use of the line; generally speaking, the greater the signal-to-noise ratio of the subchannel, the more bits are modulated on the channel. If the signal-to-noise ratio of the subchannel is poor, it will be abandoned. ADSL can realize the data transmission rate of uplink 640kbps and downlink 8Mbps; 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 a frequency band other than telephone voice; therefore, the original telephone service is not affected.

This is the end of this article. I hope it will be helpful to all of you.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.