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Write any four advantages of VF signalling over DC signalling.

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Ans: Advantages of VF signaling over DC signaling: 1) Large number of circuits can be easily derived over a single pair of wires (single pair can control 18 stations). 2) Signal attenuation can be compensated by use of repeater stations. 3) No interference and cross talk over adjacent conductors. 4) Can be used over long distances. 5) Can be used where large number of equipment can be controlled

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