Follow the instructions below to connect a BCM v3.7 or below with NetPBX:

1. Make sure the  CDRServer.EXE and Interop.CDRSERVERLib.dll files are placed in the same folder as NetPBX.EXE, usually located in {pf}\Tri-Line\NetPBX.
   
2. Register CDRServer.EXE by running the command line with administrator privileges and typing the following command under the directory path of the NetPBX folder: CDRServer.EXE/regserver.
3. Open the computer's local security policies: Start -> Control Panel -> Administrative Tools -> Local Security Policy.
   
4. Within the  tree, change the following items as highlighted in the screenshot below:
   
   
   1. Network Access: Let Everyone permissions apply to anonymous users. Set this to Enabled.
   2. Network Access: Sharing security model for local accounts. Set this to Classic.
   3. DCOM: Machine Access Restrictions: Click on Edit Security and add the following user accounts: . Set each one to have full access rights.
      
5. Next step is to modify the way DCOM behaves on the computer by executing the DCOM configuration program: Start -> Run -> DCOMCNFG [enter]. Browse the tree to the following location: . Righ-click on My Computer for Properties and amend or update the following options:
   
   
   1. On the Default Properties tab:
      Enable Distributed COM on this computer: tick the box for his option
      Default Authentication Level: set this to Connect
      Default Impersonation Level: set this to Identify
      
   2. On the COM Security tab:
      Go to the Access Permissions section and select Edit default.
      Add the following accounts and set both local and remote access permissions:  and .
      
      Go to the Launch and Activation Permissions section and click on Edit default tab.
      Add or update the following accounts to give them all local and remote access permissions:   and .