If the Bluetooth-enabled mobile phone with a Bluetooth headset with a Bluetooth headset must support two protocols: Headset profile (Headset) and HandsFree Profile (Hands-free). Slightly before the establishment of the network, all devices in the ready state. In this state, the device is not connected once every 1.28s monitor news, equipment, once awakened, in the pre-set frequency hopping on 32 monitoring information. The number of frequency hopping vary by region, but the 32 hopping frequencies used by most countries. Initialized by the master device connection process. If a device's address is known, on the use of pages of information (Page message) to establish a connection; If the address is unknown, followed by pages of information on the use of query information (Inquiry message) to establish a connection. In a piconet, no data transmission equipment to the energy conservation condition. From the master device can be set to maintain the way, this time, only the internal timer work; can also request from the device into hold mode.The customer asks for the stricter inspection of  Cellular Phone Jammer. Equipment transferred from the hold mode, the data transmission can be resumed immediately. Connecting several piconets or managing low-power devices, often used to maintain way. Listening mode and sleep mode are the other two low-power work. Bluetooth baseband technology supports two connections: connection-oriented (SCO) method, mainly used for voice transmission; connectionless (ACL) method, mainly used for packet data transmission. Baseband controller uses three kinds of Error Detection and Correction: 1 / 3 forward error correction coding (FEC); 2 / 3 FEC coding; automatic retransmission request (ARQ). The factory needs the a little stricter inspection of  mobile phone jammer to ensure quality of  cell phone jammer.
Authentication and encryption services provided by the physical layer. Authentication using a password - response mode, the connection process, the certification may be required once or twice, or no certification. Bluetooth certification for any part of the system are important, it allows users to add their own trusted Bluetooth devices, for example, only the user's own laptop computer can only communicate with the user's own mobile phone. Bluetooth security mechanism is intended to provide the appropriate level of protection, if the user has a higher level of confidentiality requirements, you can use a valid transport layer and application layer security mechanisms. The vice manager is showing the technical inspection group around  cell phone jammer workshop.