gsm mvno

MVNO (mobile network operator) virtual network operator, without its own physical network, provides network services by renting a network of MnO (mobile network operator. We know that spec requires operators to be differentiated by MCC/MNC (mobile country code/mobile network code), while MVNO and MCC/MNC corresponding to MnO are the same, MVNO needs to define add

0x00 written at the beginningRecently, the discovery of crazy Danish hacker on YouTube released a very good tutorial video: Use SDR sniffing visits to listen to GSM network traffic (GSM sniffing Teaser–software Defined Radio Series). This tutorial is illustrated in detail from the installation of a TV stick to scanning, the use of sniffer tools, and the capture and decryption of

GSM 's English is globalsys-temformobilecommunica-tion, the global mobile communication system, proposed by the European Standardization Commission. GSM system has good anti-theft copy ability, large network capacity, rich number resources, clear calls, strong stability is not easy to be disturbed, information sensitive, call dead-ends less, mobile phone low power consumption characteristics. GPRS is the ab

The purpose of the wireless network evaluation is to analyze the network running data and give a reasonable evaluation. Including the quality of network planning, network operation, network operation problems, hidden dangers, network investment utilization and other projects, and then fully grasp the overall operation of the network, for the further optimization and construction of the network to provide a direct reference. In terms of GSM and CDMA n

Summary Starting from the analysis of GSM spectrum efficiency, this paper analyzes the loss of spectrum efficiency of voice service after the GSM network is upgraded to GPRS, and the new data service access ability, and finally takes into account the maximum access ability of the integrated service under GSM current spectrum from the mutual substitution between

GSM system is the world's most widely-covered second-generation wireless network, it uses TDMA (time division multiple Access) approach, that is, in a carrier channel, at the same interval at the same intervals into a fixed cycle of several time slots, each time slot carries a business user information and necessary signaling. In this way, a carrier channel is occupied by a number of users in chronological order, with different time slots as a way of

It is reported that China Unicom to "World Wind" named dual-mode mobile phone and dual-mode business will be formally presented in the end of July in front of Chinese users. The meaning of the dual-mode mobile phone is to provide a seamless mobile communication experience for the end users, so that those who are often in the mobile business people truly realize the "one machine around the world" dream. At the same time, dual-mode mobile phone will also be very good integration of the advantages

Due to the surge in the number of mobile phone users, the mobile phone communication network system is overloaded, the final result will lead to failures such as disconnection, crosstalk, poor voice quality, and difficulty in accessing the Internet. To solve the above fault, more and more mobile phone operators and manufacturers are realizing this and are constantly taking relevant measures to further expand the mobile phone network system and improve the voice quality during mobile phone commun

7. After sending a short message, you receive an error message +CMS error 515This error will occur if your GSM modem accepts new instructions during initialization or during instruction execution. You must wait until the initialization is complete or the instruction executes.8. How do I know if a short message you sent has been delivered to the destination numberA) Send in text formatWhen you send a short message in text format, your

Send a Chinese text message using two AT commands Set to PDU ModeAT + CMGF = 0 or 1 Enter // set the TEXT message encoding mode to 0: PDU Mode 1: TEXT mode only letters or numbers are supported. To send a Chinese TEXT message, only PDU Mode C can be expressed as follows:"AT + CMGF = 0/r/n" Send SMS"AT + CMGS =" Pdu encoding format08 // short message center Length91 // the short message center has a country code not 8168 31 08 02 00 05 f0 // Short Message Center31 // Status Report required // 11

Location service has become a popular technology and will become a standard for all mobile devices (such as smartphones and handheld computers) in the future. With the rapid growth of users' demand for Location-Based services, wireless Location technology is becoming more and more important. The positioning of GSM cellular base stations is characterized by the advantages of fast positioning speed, low cost (no additional hardware needs to be added to

Write something that many people are interested in. about the GSM communication network monitoring problem, when the Guangzhou black market appeared related devices that year, it was very popular. the masses were at risk. some so-called senior experts jumped out and said "It is impossible, and the GSM network is secure ". this may be the biggest crisis for mobile companies. we can laugh at what the experts

GSM is a communication technology that combines FDMA (Frequency Division) with TDMA (Time Division). All users in the network use different frequencies for communication. CDMA is a communication system that uses code division multiple access technology. In this system, all users use the same frequency. Comparison of FDMA, TDMA, and CDMA is as follows: The GSM system is the second generation of digital cellu

At present, the new development trend of China's communications industry has brought the importance of network regulation and network optimization to the fore. On the one hand, the rapid development of wireless transmission technology, the future of 3G, especially the scale of TD-SCDMA, requires the network specification network optimization technology must keep pace with the times; on the other hand, the restructuring of China's telecommunications industry, operators must evaluate, plan, and op

The traditional GSM network operator has a wide coverage of the GSM network and a large user base. It is very important to smoothly evolve the 2G network to the 3G network, GSM carriers must maintain their network coverage and user advantages, and minimize the adverse effects caused by the introduction of 3G. This article proposes several suggestions on smooth ev

The confidentiality of the GSM mobile phone is much higher than that of the analog phone, and the model is rich and colorful, with the global roaming function. It has become the first choice for users. Pay attention to the following when using a GSM mobile phone: 1. In addition to the locking function, the GSM mobile phone can also lock the card. After locking t

The wireless connection is comprehensive, but the settings are confusing. 1. China Mobile wireless connection1) GSM (CSD) -- GPRS (edge) -- 3G (HSDPA)GSM (GlobalSystem for Mobile Communications. GSM is the second generation wireless communication network standard, commonly known as 2G (2ndGeneration) network is also the first generation of digital signal communi

Notes on Digital Communication Principles (ii) --- GSM System 1. GSMSystem Structure It demonstrates a typical GSM system: 1)Mobile (MS) The mobile station is a device used by users in the public GSM mobile communication network and the only device in the entire GSM system that users can directly access. Apart from wh

As a new technology and new service introduced in the network, the implementation of GPRS will certainly affect the existing GSM network resources which are based on voice. In addition, because of the different characteristics of GSM voice service and GPRS data service, the influence of network specific function on them is different, Therefore, in the network planning should give GPRS data and

GSM networks are complex, including switching systems and base station systems. Exchange subsystems include HLR, MSC,Vlr, AUC, and EIR, and base station systems, other networks such as PSTN, ISDN, data network, and other plmn. To connect a call to a mobile customer, you need to call the corresponding entity. Therefore, correct addressing is critical to the numbering plan. 1. Mobile Station ISDN number (msisdn) Msisdn number refers to the number that t