background image
Answers to Review Questions
471
17.
B. q.931 is responsible for the call setup and disconnect, since this
occurs on Layer 3.
18.
A, B. The D channel is used for administration and not data (payload)
transfers.
19.
C. Autodetect tells the router to listen for the switch type and set it
accordingly.
20.
A. A terminal adapter is required for a non-ISDN device.
Copyright ©2000 SYBEX , Inc., Alameda, CA
www.sybex.com