How many cell phone jammers should be used

How many  cell phone jammers  should be used. 
So that the need to convene an emergency meeting anytime, anywhere, through the launch of the dispatch center managers meetings, eliminating the geographical factors of the meeting. Conference call, the dispatcher can dispatch software via the touch screen, control the function of the single party to multi-party or a party on the side of the conversation, the other parties, listening to music waiting to facilitate the leadership of the different participants assigned a different matter; system to support the leadership of incoming phone calls after the transfer and conference call capabilities, the dispatcher in the course of the meeting can be soft hang out, on-demand to enter the venue and other functions. Group call  group call interface in a group call system can be set to multiple groups, each multi-number of group functions.  cell phone jammers  can be used in the small scale examination.
The touch screen scheduling, address book query pre-defined groups need to call an outside number, dispatchers set up a good group number one-touch, one-button group call function. Voice through broadcast through dial a call to the called party when the called party answers the call through the dial system will automatically play the voice files have uploaded a good notices, bulletins and other formatting information quickly and accurately convey the customs officers to phase 15. Dial system to support the group calling. The smart address book interface contacts is at the core of the system, the system of scientific management of the address book address book structure is more reasonable, more economical resources, the operation more convenient, more widely used.  cell phone jammers  can be adopted in the large scale examination.
The technical program of the emergency scheduling of the CPC Guangdong Provincial Mobile use the C  B  S structure, using the C + +  J2EE  C # tool for system development. C + + is responsible for the underlying development work, the J2EE application-layer development, C # is responsible for the mobile information terminal application-layer development. This system module is as follows: phone hands-free, phone, hang up, telephone outgoing call screen pops, multiple shells screen allocation, priority soft phone module level playing the screen, grab then, call timers, secondary dial, call forwarding, caller keep the left seat right seat switch, telephone conversation records departments infinite level CRUD department CRUD, address book contacts CRUD, recorded history version of communication contacts module import View import contacts, contacts by individual departments import and export.