Answers to the review questions can be found in Appendix A, "Answers to Review Questions."
| 1: | What is the scope of the I.431 and I.432 standards? |
| 2: | Where does the name D channel come from? What are the operational speeds of the D channel for BRI and PRI? |
| 3: | What is a V-reference point in ISDN? |
| 4: | What are the important pins in a S/T interface? |
| 5: | What is the modulation of the ISDN U-interface? |
| 6: | What is the bit rate of the S/T interface and U-interface? |
| 7: | How many INFO messages participate in the BRI's Layer 1 initialization? What does INFO0 mean? |
| 8: | Which bit in the ISDN frame indicates line activation? |
| 9: | What makes up DLCI in ISDN? What is the length of DLCI, TE, and SAPI? |
| 10: | What are the two indicators that Layer 2 is active? |
| 11: | What does TE = 127 mean? |
| 12: | What is the dynamic range of TEI? |
| 13: | What does SAPI = 0 indicate ? |
| 14: | How do you distinguish an incoming from an outgoing call? |
| 15: | Which ISDN protocol provides information about Bearer capability. Name three basic types of Bearer capabilities. |