Drop and insert
Encyclopedia
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.
Multichannel
Multichannel may refer to:*Multichannel audio, i.e.**Stereophonic sound, namely two channel audio**Surround sound, more than two channels though still technically stereo**Ambisonics, a studio or live way of recording with many channels...
transmission system
Transmission system
In telecommunications a transmission system is a system that transmits a signal from one place to another. The signal can be an electrical, optical or radio signal....
, 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
Frequency
Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency.The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the 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
Drop (telecommunication)
Drop, in telecommunication, has several meanings.* In a communications network, a drop is the portion of a device directly connected to the internal station facilities, such as toward a telephone switchboard, toward a switching center, or toward a telephone exchange. A drop can also be a wire or...
-and-insert point are not diverted.