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14. Identify ISDN protocols, functions groups, reference points, and channels.

1. What is D in ISDN?

2. What is E in ISDN?

3. What is I in ISDN?

4. What is P in ISDN?

5. What is Q in ISDN?

6. What is R in ISDN?

7. What is S in ISDN?

8. What is T in ISDN?

9. What is U in ISDN?
   A. A reference point between an NT1 and an NT2.
   B. A reference point between an NT device and a line-termination equipment.
   C. A reference point between a non ISDN equipment and a BRI.
   D. A reference point between a non ISDN equipment and an NA1.
   E. A reference point between a non ISDN equipment and a PRI.
   F. A reference point between a non ISDN equipment and a TA.
   G. A reference point between a user terminal and an NT2.
   H. A reference point between a non ISDN equipment and a BRI.
   I. Concept, terminology, and services.
   J. Data.
   K. Existing ISDN service.
   L. Existing telephone service.
   M. Internetworked ISDN service.
   N. Quality of ISDN service.
   O. Routing and signaling.
   P. Switching and signaling.
   Q. No answer.

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