You will be very surprised by the questions raised by Xiaobian. What is the difficulty in purchasing a telephone? Is there any trick? Then today Xiaobian will share with you the knowledge of telephone purchase. hope it is of help to you. The classification analysis from the phone helps you to understand the phone more. (1) The format of the telephone. There are two types of telephone dialing methods: pulse mode and dual tone multi-frequency mode. From a technical point of view, the dual-tone multi-frequency method is advanced, and its dialing speed is fast, the bit error rate is low, and the time for occupying the numbering device is short. The former applies to electromechanical telephone exchanges and the latter applies to program-controlled telephone exchanges. Therefore, the user should choose the telephone to suit the local conditions. If you can't figure out which dialing method is used by the local telephone network, you can consider purchasing a telephone with two dialing modes at the same time, that is, the telephone should be equipped with a P/T switch; Although the price is higher, the line adaptability is good, and it will not be affected by the change of the line dialing mode. There are many functions of the telephone. When you buy a telephone, you must know what kind of phone you want. If the content of the call needs to be recorded, you can use the answering machine. If you want to make a phone call while you are doing something, you can use the hands-free speakerphone. If there is no special requirement for the general phone, you can use the general button-type dual-tone phone. How do you know the purchase knowledge of the phone that Xiaobian introduces to you, is it a new understanding of the phone? However, Xiao Bian reminds you that when you purchase a telephone, you must go to a regular store or website to purchase, in order to ensure the quality, there will be corresponding after-sales service. WEIHAI WEFISH OUTDOOR PRODUCTS CO.,LTD , https://www.wefishtackle.com
(2) Network access card. According to the relevant regulations of the Ministry of Posts and Telecommunications of China, both the telephone connected to the public telephone network and the telephone connected to the subscriber switch line connected to the public telephone network line must have a network access permit issued by the Ministry of Posts and Telecommunications. Therefore, to purchase a telephone, first check whether the network access license number is indicated at the bottom of the telephone. As for the telephone without the manufacturer's logo, the quality is difficult to protect, and the maintenance is also very troublesome in the future. Users should not buy cheaply.
Do you know the purchase of the telephone?