We don't have synonyms for channel bank yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are channel back, channel bass and channel bar.
(N) :
In telecommunications, a channel bank is a device that performs multiplexing or demultiplexing ("demux") of a group of communications channels, such as analog or digital telephone lines, into one channel of higher bandwidth or higher digital bit rate, such as a DS-1 circuit, so that all the channels can be sent simultaneously over a single cable called a trunk line.
(N) :
In telecommunications, a channel bank is a device that performs multiplexing or demultiplexing ("demux") of a group of communications channels, such as analog or digital telephone lines, into one channel of higher bandwidth or higher digital bit rate, such as a DS-1 circuit, so that all the channels can be sent simultaneously over a single cable called a trunk line.