1. A network monitoring system for performing distributed processing to monitor a network, comprising:
a client device having a client application, said client application including information transmission requesting means for making a request for transmission of network information and information providing means for providing the received network information to a user; and
a server device having a first service application, a second service application and a server application, said first service application for managing first network information, the first network information being included in fault information about a fault occurring within the network, and said second service application for managing second network information, the second network information being included in performance information including operation status of the network and information relayingtransmitting means for relaying the firstsecond network information to be transmitted to the client application, said server application including account authentication means for verifying authenticity of account of the client application, said account authentication means including a user account management table for managing user account information including a first identifier of said first service application and a second identifier of said second service application, and managing logonlogoff state information indicating a logged-onlogged-off state of the server application, information storage means for storing the firstsecond network information, and first service application control means for controlling start and termination at logon and logoff, respectively, of the first service application corresponding to the client application, and collectively controlling start of the first service applications, without starting the first service applications one by one at a time of logon by said client application, when the first service applications is to be started, said start occurring in response to receipt of the user account information with the first identifier transmitted from said client application, and second service application control means for controlling start and termination at logon and logoff, respectively, of the second service application corresponding to the client application, and controlling start collectively of the second service application, without starting the second service application, one by one at the time of logon by said client application, when the second service application is to be started, said start occurring in response to receipt of the user account information with the second identifier transmitted from said client application,
wherein, when a logon is instructed from the client application, said account authentication means checks the current state of the server application in accordance with said user account management table, and sends a notification of error to the client application, if the server application is already in the logged-on state,
wherein said server application of said server device further includes timer setting means, said timer setting means starting a timer at logon of the server application and, when a timer set value is reached, autonomously causing the server application to log off,
wherein said server application of said server device further includes communication state monitoring means, said communication state monitoring means monitoring a state of communication between the server application and the client application and, when a fault has occurred, autonomously causing the server application to log off.
2. The network monitoring system according to claim 1, wherein said user account management table manages detailed information about a password.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A device comprising:
a magnetic circuit system comprising a magnetic loop, an upper magnetic conduction plate, and a low magnetic conduction plate, said low magnetic conduction plate comprising a hollow structure;
a vibrating system comprising vibratable diaphragm and a coil, said vibratable diaphragm comprising a top dome being at least partially made of transparent material; and
an optical system including a lens and a photo-sensitive element;
wherein said vibratable diaphragm is adapted and arranged, together with the lens in said optical system to constitute an optical focusing system.
2. The device according to claim 1, further comprising a printed circuit board and an electrodecontact, wherein the vibratable diaphragm comprises a corrugated rim and wherein a first end of said coil is connected with said corrugated rim, and a second end of the coil is fixed to said printed circuit board through a retractable wire loop, and wherein said electrodecontact is an interface of said photo-sensitive element and said coil to an outer controlling circuit.
3. The device according to claim 2, wherein said coil, under the action of static magnetic force generatable in the magnetic circuit system, is adapted to move said top dome through said corrugated rim to displace, wherein the movement is determined by the driving algorithm provided by the outer controlling circuit, and is controllable by adjusting voltagecurrent intensity of a direct current suppliable from the electrodecontact, so that said top dome together with the lens in said optical system constitutes the optical focusing system.
4. The device according to claim 2, wherein when low frequency acoustoelectric signals are applied to said electrodecontact, said coil, under the action of alternative magnetic force generatable in said magnetic circuit system, is adapted to drive said top dome through said corrugated rim to vibrate.
5. The device according to claim 2, wherein when alternative electrical signals are applied to said electrodecontact, said coil, under the action of magnetic force generatable in the magnetic circuit system, is adapted to drive said top dome through said corrugated rim to reciprocate.
6. The device according to claim 5, wherein the frequency of said alternative electronic signal is identical with the resonance frequency of said vibrating system, the vibrating force generated by said vibrating system drives a housing provided with said combination device to vibrate, thereby achieving a speaker function.
7. The device according to claim 6, wherein the resonance frequency of said vibrating system is substantially determined by the compliance coefficient of said corrugated rim and the mass sum of said coil and said top dome.
8. A mobile terminal equipment including the device according to claim 1.