62 S-ICX (International) issued October 2000 S-ICX-50-700Chapter 3. System Features Section 700 - OperationConsiderations• The dialling restrictions included in this feature help prevent unauthorized outgoing calls. It ispossible; however, to program your System to allow SSD to override TRS (Call Barring).Trunk Access GroupsDescriptionTrunks can be placed in trunk groups. When a trunk group is accessed, the System automaticallyselects an open trunk from the group.OperationTo access a trunk group:Hardware Requirements• N/AConsiderations• Trunks can only appear in one trunk group.• If Automatic Call Routing is enabled, the MCO access code (default = 9 [UK/HK] and 0[Taiwan/Malaysia/Indonesia]) automatically accesses the Automatic Route Selection (ARS)features.Trunk InterfaceDescriptionThe System supports several types of trunk Interfaces including the following:• Direct Dial Inward (DDI)• Integrated Services Digital Network (ISDN) - Basic Rate Interface (BRI)• ISDN - Primary Rate Interface (PRI)• Loop StartEach trunk type supports various features such as Delayed Ringing, Night Ringing, etc.Action Result1. Enter the Trunk Access Code (default = 9 [UK/HK], 0 [Tai-wan, Malaysia, Indonesia], or 81-84).2. Dial the phone number.