Designing the dial plan for SIP trunking

Before you begin configuring SIP trunking, you should figure out how calls from IBM® Sametime® will connect to the third-party SIP endpoint by working out a dial plan. A dial plan is the set of dial strings (phone numbers), routes (connections), and rules (conditions) that enable one user to place a telephone call to another user. Determining the dial plan first provides information needed during later configuration steps.