3-2 ISDN
< Free Open Study > Primary Rate Interface (PRI) has 23 B (bearer) channels and one D (data) channel in North America and Japan, and 30 B channels and one D channel in the rest of the world....
View Article3-3 Dial-on-Demand Routing (DDR)
< Free Open Study > DDR allows dialed calls to be made and closed dynamically, as needed. Outbound calls are triggered based on configurable traffic parameters. DDR can be configured through...
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