PSTN signaling in the United States uses ________.
A) SS7
B) ATM
C) TDM
D) SIP
Correct Answer:
Verified
Q4: Which of the following is NOT one
Q5: In TDM,a voice conversation gets the same
Q6: Because of the curvature of the earth,microwave
Q7: Which of the following have an altitude
Q8: _ is/are widely used in Europe for
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
Q13: SONET/SDH uses a _ topology.
A)point-to-point
B)hierarchy
C)mesh
D)ring
Q14: Cross-connect devices are found in _.
A)PBXs
B)equipment rooms
C)telecommunications
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