How does the U1900 restrict external users form calling intra-office users?

Discriminate prefixes of different area numbers. Specifically, specify 32-level customized rights for different area number prefixes And then configure corresponding customized rights for numbers in corresponding areas.

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.

To allow only some users to call an intra-office number on the U1900, perform the following steps: Step 1 Configure the number as a prefix and define custom call right 1 for this prefix. config add prefix dn 90 callcategory basic callattribute inter cusattribute cus1 cldpredeal no Step 2 Select custom call right 1 for users who can call this number. Specifically, on the web management system of the U1900, choose User > SIP User > Service Configuration > Outgoing Call Right and select this custom call right.

The call waiting announcement is played by the carrier.

The software parameter 269 determines whether to display the number of the transferred party when a call is transferred. The default value of this parameter is 1, indicating that the service party's number is displayed. If the value is 0, the original calling number is displayed. To modify the value of this parameter, run the config softargu type 269 value 0 command. Note: If the 269 software parameter value is set to 0, when an incoming call routed through the trunk is then routed to an external number, the calling number is authenticated on the carrier side, which may result in the failure of calling forwarding.