VoIP: WAN connection between CUCM(HQ) and CUCME(BR) ---------To be continued

Scenario
1. HQ has CUCM to manage ip phones.(ephone-dn: 2xxx)
     
    HQ has dial-plan to call BR (3XXX), and BR has dial-peer to call HQ (2XXX) through H.323

    HQ has connection to PSTN which is alternative to connect BR and vice versa.
 
        * Call Partitions (Lobby, Employees, Managers, Executives, Local PSTN and
            International PSTN)
        * Assigning calling privileges (Partitions and CSS)
        -    Lobby phone can only call Employees
        -    Employees can call Lobby, Employees, Managers and PSTN ( limited to international calls )
             , but not Executives
        -    Managers can call Lobby, Employees, Managers, Executives, and PSTN (no limitation)
        -    Executives can call everywhere.
         * Call Park (115X)
         * Call Pickup
         * Shared Lines
         * Do not disturb
         * Call back
         * Barge and Privacy
         * Services / Extension Mobility
2. BR has CUCME to manage ip Phones.(ephone-dn: 3xxx)