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Tele-Communication (Telecom) Terms Glossary and Dictionary
Back-Channel
Back-channel is, in an asymmetric telecommunications system, typically a low-speed or less-than-optimal transmission channel opposite to the main channel's direction. An example of this is in ADSL where "A" stands for "asymmetric", and the channel from the subscriber to the supplier is slower and may be of less capacity than the channel from the supplier to the subscriber.
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