PCB 阻抗计算工具

CITS25 Network Activation (V2.010) ================================== Network Activation Scheme ------------------------- To enable network operation the CITS25 must first be activated on one computer with a special code. This machine is called the Network Server. Any other computer running the CITS25 on the same network can then be activated by connecting it to the Network Server. These machines are called Network Clients. The activation code ties the Network Server to one specific computer but there is no limit to the number of Network Clients. The CITS25 program on a Network Client uses DCOM to launch another instance of the CITS25 on a remote computer. It then communicates with this over the network to verify that it has been activated as a Network Server. If the remote computer is a valid Network Server then the Network Client is activated too. The above procedure happens when the client is first activated and, once successfully activated, every time the CITS25 program on the Network Client is run. Therefore the Network Server nust remain activated and accessible on the network in order for its clients to function. Network Server Requirements --------------------------- The Network Server computer must be running Windows NT, version 4.0 or higher. This is because NT 4.0 includes native support for DCOM and allows remote launching of applications. It is critical that DCOM is correctly configured on the Network Server. Once this is done activating remote clients should be quite straight-forward. See Distributed COM Configuration below for details of how DCOM should be configured. Network Client Requirements --------------------------- Network Clients may run Windows 95/98 or NT. DCOM support may not be present on all Win95/98 machines. This will be evident when attempting to activate the software as the Network Activation buttons on the "Help/Software Activation..." dialog will be disabled (grayed out) and a diagnostic message will be displayed at the bottom of the dialog. DCOM support may be provided by either installing Internet Explorer 4.0 or by running "DCOM95.exe"/"DCOM98.exe" (available for download from the Microsoft website). Network Protocol Requirement ---------------------------- TCP/IP must be installed on client and server and DNS/WINS Name resolution set up correctly on the network. Test this by pinging the server by name from the client. If this doesnt work try pinging by IP address. If neither of the above works TCP/IP is not setup properly on the network. If it works by using an IP address but not by computer name then DNS/WINS Name resolution is not set up correctly. DCOM must be enabled on both client and server machines. This is the default but can be changed using DCOMCNFG (see below). If DCOM is not enabled then the Network Activation buttons on the "Help/Software Activation..." dialog will be disabled (grayed out) and a message displayed below them to this effect. Distributed COM (DCOM) Configuration ------------------------------------ It is necessary to modify the DCOM configuration on the Network Server to enable clients to remotely launch the CITS25 on the server. There is a utility called DCOMCNFG.EXE which may be run from the "Start Menu\Run..." dialog to adjust these settings. To use this on NT you need to be logged in as an administator. DCOMCNFG allows you to change either system wide parameters or properties for a specific application. It is suggested that the default parameters be left unaltered and that only CITS25 specific properties should be adjusted to facilitate network operation. Note that in order for DCOMCNFG to list the CITS25 in its applications list it needs the CITS25 to have been run at least once on that machine. Select CITS25 from the DCOMCNFG Applications list and then click the "Properties..." button to adjust parameters specific to the CITS25. Suggested CITS25 specific DCOMCNFG settings for Network Server:- General :- Authentication Level: Default Location :- Only "Run application on this computer" checked Security :- Use default access permissions Use custom launch permissions: Everyone - Allow Launch Use default configuration permissions Identity :- "This User" User: Cits25User Password: **** Confirm: Password **** Endpoints :- Defaults system protocols The above uses the Identity set to "This User" where Cits25User is a valid user name for an NT account set up with the User Manager. Cits25User can be an ordinary user with the default user rights. This setup is recommended becauser it will allow remote computers to launch the CITS25 on this machine even when there is nobody currently logged on. Alternatively Identity can be set to "Interactive User". Installing/Running on Network Client ------------------------------------ If the software is installed on the client from the install disks or from the self-extracting executable downloaded from the web then all files necessary for correct operation should be installed on the client. The CITS25 application may also be run on a client by using a shortcut to the CITS25.exe file on the server PC. This may not work if certain operating system files are not present on the client. The application will report any needed files which are not present when it is first run. To fix this either install the software on these clients or copy the missing files from another computer to the windows system directory of the client. The same thing may happen if the CITS25 executable is copied to a computer rather than being installed.