In telecommunication, the term primary channel has the following meanings:
- The channel that is designated as a prime transmission channel and is used as the first choice in restoring priority circuits.
- In a communications network, the channel that has the highest data rate of all the channels sharing a common interface.
A primary channel may support the transfer of information in one direction only, either direction alternately, or both directions simultaneously.
References
Primary channel Wikipedia(Text) CC BY-SA