| A | B |
|---|
| Channel D | ISDN channel that is used to establish call setup |
| TA | what a TE2 requires to attach to an ISDN connection |
| NT1 | ISDN device that connects four-wire ISDN wiring to the two-wire local loop facility |
| Signaling | what ISDN protocols that begin with Q identify |
| HDLC | what the encapsulation type will be if no changes are made during the ISDN installation |
| Remote Node | ISDN connection method that allows a remote user to appear as part of the network |
| B channels | ISDN channels that are for voice, video, and data |
| Service provider | from whom the SPID obtained, when configuring ISDN on a router |
| #show ISDN status | command used to confirm BRI operations |
| (config)#interface bri 0 | command used to enter the interface configuration mode and to configure the BRI interface |
| 2B+D | In reference to the ISDN BRI service, two B channels and one D channel |
| ISDN | A communication protocol, that permits telephone networks to carry data, voice, and other source traffic. |
| LAPB | A data link–layer protocol in the X.25 protocol stack |
| LAPD | An ISDN data link–layer protocol for the D channel |
| Q.931 | A protocol that recommends a network layer between the terminal endpoint and the local ISDN switch |
