Channel bank
Device that performs multiplexing or demultiplexing of communications channels
![](http://upload.wikimedia.org/wikipedia/en/thumb/f/f0/Newbridge_communications_channel_bank.jpg/220px-Newbridge_communications_channel_bank.jpg)
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 (T1) circuit, so that all the channels can be sent simultaneously over a single cable called a trunk line.
A channel bank may be located in a telephone exchange, or in an enterprise's telephone closet or enclosure where it "breaks out" individual telephone lines from a high-capacity telephone trunk line connected to the central telephone office, or the enterprise's PBX system.
See also
- Multiplexer
- Multiplexing
- Digital Signal 1
- Carrier system
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