drop and insert

In a multichannel transmission system, a drop and insert is a process that diverts (drops) a portion of the multiplexed aggregate signal at an intermediate point, and introduces (inserts) a different signal for subsequent transmission in the same position, e.g., time slot or frequency band, previously occupied by the diverted signal. The diverted signal may be demodulated or reinserted into another transmission system in the same or another time slot or frequency band. The time slot or frequency band vacated by the diverted signal need not necessarily be reoccupied by another signal. Likewise, a previously unoccupied time slot or frequency band may be occupied by a signal inserted at the drop-and-insert point. Signals not of interest at the drop-and-insert point are not diverted.

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digitizer
digroup
direct access
direct connect
direct distance dialing
directional coupler
directive gain
direct sequence spread spectrum
disengagement originator
dispersion limited operation
distortion

distortion limited operation
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distributed queue dual bus
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double sideband suppressed carrier transmission

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dual in line package
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duobinary signal
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effective earth radius
effective height
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effective transmission rate
efficiency factor