CDMA is an abbreviation of CDMA (Code Division Multiple Access), it is the branch of the digital technology ? the spread-spectrum communication technology to develop a new wireless communications technology. Principle of the CDMA technology is based on spread spectrum technology, will be transmitted with a certain signal bandwidth information and data, with a bandwidth much larger than the signal bandwidth, high-speed pseudo-random code modulation, the bandwidth of the original data signal to be extended, then the carrier modulation and sent out. The receiver to use the exact same pseudo-random code, the receiver bandwidth signal processing, broadband signal replaced the original information data of the narrowband signal is despread in order to achieve information and communication. After cell phone jammer is adjusted carefully by the user.
CDMA is characterized by: good call quality: CDMA call quality than GSM call in the same environment, the noise of CDMA than GSM is much smaller, and voice distortion is much smaller than GSM. Green: CDMA uses the excellent power control technology, CDMA mobile phone radiation is much smaller than the GSM. Confidentiality: CDMA uses Code Division Multiple Access technology, which is an almost impossible to decipher the communication code. Compared to GSM technology, CDMA is difficult to eavesdrop. Switchboard service is the integration of the CDMA mobile communication and fixed telephone number of the applicant can choose to provide customers with access portal. It is in the accordance with the installation instruction of? cell phone jammer .
Convenient and efficient internal and external communication, with the query then turn and conferences, business travel service functions switchboard service to achieve to improve the efficiency of internal and external communication, enhance corporate image. Provide integrated VPN, corporate switchboard services. Tianjin Telecom network resources and infrastructure. Tianjin node location is very important in the northern node of the CHINANET the north node, and its position second only to Beijing. Direct connection in the three existing Article 10G respectively connected to three international exports of Beijing, Shanghai and Guangzhou, and each has direct connection to connect the north of the remaining eight provinces and cities, its fast and stable network performance. Tianjin Telecom in Tianjin within relying on Tianjin Telecom IP MAN to provide Internet services to users. The producer of? cell phone jammer? should provide complete after service for the customer.
Tianjin Telecom metropolitan area network is divided into three separate layers: core layer, convergence layer and access layer, as shown: The core layer consists of two core nodes, a large double outlet Chinanet backbone network interconnection . Convergence layer: MAN convergence layer is composed by nine branch nodes, the core and aggregation layer 10G line connected to aggregation and access layer are connected to a 2.5G line. Convergence layer is responsible for pooling distributed access to the user, data exchange, and provide traffic control and user management capabilities. The core and aggregation nodes together constitute the backbone of the MAN. Access layer: Provides various types of user access, and flow control functions provide a user when necessary.? cell phone jammer? can keep dignity of court.
Wide coverage, high-capacity mobile communications network and carrier-class business management platform based on China Telecom. Push to Talk (PTT) technology, with PTT function mobile terminals. Provide customers with a half-duplex intercom communications services within the mobile communication network coverage, led by Qualcomm to develop standards publicly released in January 2002, which is characterized by half-duplex, high speed call setup and group management, user through the press the PTT key moment can quickly establish a connection other Qchat users, the cluster communication between the individual and the individual and the individuals and groups. Tianyi intercom business features. Intercom and mobile phone integration, both call. So that the normal use and operation of? cellphone jammer can be ensured for the customer.
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