How to configure the U1900 so that users in different office areas cannot communicate with each other?

On AR routers, you can configure advanced ACL and ACL-based traffic classifiers to control mutual access between users on different network segments.

Configure a security policy to permit access to the desired destination network segment and block all others.

Yes. If you want to configure different timeslots to be bound to different office routes, run the corresponding command to modify the office route of a timeslot. The command varies depending on the U1900 model. 1. U1911/U1960/U1981: config modify board slot slot type tkcinboard tkcinboard officeno officeno 2. U1980: config modify board slot slot type tkcinboard tkcinboard officeno officeno 3. U1910/U1930: config modify cvp type dtu tkcincard tkcincard officeno officeno

Two methods are available: 1. Configure direct inward dialing (DID) numbers for intra-office users. External users can directly dial the DID numbers. 2. Configure the automatic switchboard service for users without DID numbers. When an external user dials the switchboard number, the call can then be transferred from the switchboard to the extension.

Configure the call source to enable users in the call source to make outgoing calls through a specified office route. The specific configuration is as follows: 1. Run the following commands to add call sources 1 and 2: config add callsource no 1 config add callsource no 2 2. Run the following commands to add users 5032 to 5049 to call source 1 and add users 7000 to 7019 to call source 2: config modify subscriber dn 5032 callsourceno 1 number 18 config modify subscriber dn 7000 callsourceno 2 number 20 3. Run the following commands to add rerouting analysis. In this way, when users 5032 to 5049 in call source 1 dial prefix 9 corresponding to the office route selection code 1 to make outgoing calls, calls are routed through office route 4, and when users 7000 to 7019 in call source 2 dial prefix 9 corresponding to the office route selection code 1 to make outgoing calls, calls are routed through office route 0. config add routeanalysis officeselectcode 1 callsourceno 1 officeno 4 config add routeanalysis officeselectcode 1 callsourceno 2 officeno 0