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Frame (telecommunications)

In telecommunications, a frame is a packet which has been encoded for transmission over a particular link. This process involves, at a minimum, adding delimiters to distinguish the packet from dead air, address and control fields specific to the link, and checksums to detect errors. (Sometimes the address, control, and checksum fields from the higher-level protocol are used directly.)

Frame may also refer to the way a multiplexer divides the underlying communication channel so that it can be used simultaneously for more than one transmission. Notionally, each frame is a slot which could be filled by a transmitted packet. In these schemes, not all frames are necessarily in use at once.