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What does ISDN stand for?
Integrated Services Digital Networking.
What are the different kinds of ISDN channels?
D channels are used to establish connections and send management packets. B channels are used to send data.
What are the different kinds of ISDN interfaces?
Basic Rate Interface (BRI) includes one D channel and 2 B channels. Primary Rate Interface (PRI) includes one D channel and either 23 B channels (T1) or 30 B channels (E1) depending on whether you are in the US or Europe.
What is a SPID?
Service profile identifier. It's a decimal number assigned by the ISP that uniquely identifies an ISDN device.
What is the basic process for a Legacy DDR connection?
1. Route packets out the interface to be dialed. 2. Determine the subset of packets that trigger the dialing process. 3. Dial. 4. Determine when the connection is terminated.