Signalling CAS Part-1

In PSTN network, when the subscriber is idle the line impedance is ........

• High

• Low

• Medium

• None

When the subscriber lifts the hand set the line current ..........

• Increases

• Decreases

• Does not change

• None

The duration of the release signal is more than .....

• 250 milli seconds

• 500 milli seconds

• 320 milli seconds

• 200 milli seconds

Which one of the following is NOT a Calling Subscriber Line Signaling ?

• Answer back signal

• Permanent Line Signal

• Address Signal

• Ringing Signal

Ring back tone is fed back to the calling subscriber by

• Originating Exchange

• Terminating Exchange

• Originating Exchange or Terminating exchange

• None

The duration of the Register Recall Signal is ........

• 100 to 120 milli seconds

• 220 to 300 milliseconds

• 200 to 320 milli seconds

• 250 to 500 milliseconds

Register Recall Signal is a ......

• Called Subscriber Line Signaling

• Calling Subscriber Line Signaling

• Channel Associated Signaling

• Common Channel Signaling

Time slot 16 (TS16) of the frame ........ is used for multi frame synchronisation.

• F0

• F1

• F15

• F16

TCAP stands for

• Transmission Capabilities Application Protocol

• Transaction Capabilities Application Protocol

• Transaction Capabilities Application Port

• Transaction Capabilities Application Part

The functions of ISUP and TCAP layers in CC7 signaling corresponds to ........ layer is OSI model.

• Transport Layer

• Network Layer

• Presentation Layer

• Application Layer