Hallo Raghunathan,

it's a big ferrite choke, clamped arround signals, forming a 1/2-turn ferrite bead. Special soft ferrite material is used, which shows very high resistive losses above about 1...10MHz. Result is, that high frequency currents which could cause heavy emission of electro-magnetic fields are highly damped.

Equivalent circuit looks like a inductivity of some µH and a resistivity of about 100...1000Ohm, which seems only to be present for frequencies between 10MHz and 1GHz.

Ferrite chokes are necessary for many products, when they must fullfill new CE standards. If your cable contained such a choke, it's wise not to omit it, when fixing.

Bye,
Kai