SONET/SDH uses a ________ topology.
A) point-to-point
B) hierarchy
C) mesh
D) ring
Correct Answer:
Verified
Q8: _ is/are widely used in Europe for
Q9: PSTN signaling in the United States uses
Q10: In TDM,time is first divided into brief
Q11: For PBXs,call transfer is _.
A)a user service
B)an
Q12: For PBXs,camp-on is _.
A)a user service
B)an attendant
Q14: Cross-connect devices are found in _.
A)PBXs
B)equipment rooms
C)telecommunications
Q15: In data wiring,there need to be four
Q16: For PBXs,call forwarding is _.
A)a user service
B)an
Q17: SONET/SDH applies _ when there is a
Q18: Plenum wiring is needed for _.
A)heavy traffic
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