Echo suppressor is detrimental to full duplex operation because
(A) It disables one of the two pairs in a four-wire trunk line when a signal is
detected on the other pair.
(B) It enables one of the two pairs in a four-wire trunk line when a signal is
detected on the other pair.
(C) It activates both the pairs of a four-wire trunk line.
(D) It is independent of line conditions.
(A) It disables one of the two pairs in a four-wire trunk line when a signal is
detected on the other pair.
(B) It enables one of the two pairs in a four-wire trunk line when a signal is
detected on the other pair.
(C) It activates both the pairs of a four-wire trunk line.
(D) It is independent of line conditions.