ISDN and Interface

Digital Communications Systems

This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “ISDN and interface”.

1. ISDN integrates speech and data on
a) Different lines
b) Same lines
c) Different & Same lines
d) None of the mentioned

2. ISDN is a
a) Packet switched network
b) Circuit switched telephone network
c) Packet switched & Circuit switched telephone network
d) None of the mentioned

3. Circuit switched connection is provided for
a) Voice
b) Data
c) Voice & Data
d) None of the mentioned

4. Packet switched connection is provided for
a) Voice
b) Data
c) Voice & Data
d) None of the mentioned

5. Channel bonding provides
a) Higher data rate
b) Lower data rate
c) Does not affect data rate
d) None of the mentioned

6. U-interface is the two wire interface between
a) Computing device and terminal adapter
b) Terminal adapter and exchange unit
c) Exchange unit and network terminating unit
d) Computing device and exchange unit

7. T interface is the serial interface between
a) Computing device and terminal adapter
b) Terminal adapter and exchange unit
c) Exchange unit and network terminating unit
d) Computing device and exchange unit

8. S-interface is a _______ bus.
a) Two wire bus
b) Four wire bus
c) Single wired bus
d) None of the mentioned

9. The services provided by ISDN
a) Bearer service
b) Teleservice
c) Secondary service
d) All of the mentioned

10. Attributes of ISDN have
a) Definition
b) Allowable values
c) Definition & Allowable values
d) None of the mentioned

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