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plural headends
A cable TV control centre, at which terrestrial and satellite signals are received, monitored and injected into the cable network. quotations examples
The headend cable modem handles the medium access control (MAC) protocol which is necessary for point-to-multipoint operation on the tree-and-branch network.
1998, D. W. Faulkner, A. L. Harmer, Broadband Access and Network Management: NOC '98