e/Automatic sounding

Information
has gloss	eng: In telecommunication, automatic sounding is the testing of selected channels for quality by providing a very brief identifying transmission that may be used by other stations to evaluate connectivity, and availability, and to identify known working channels for immediate or later use for communications or calling. Often used to maintain connectivity in digital communications high frequency radio networks.
lexicalization	eng: Automatic sounding
instance of	c/Communication circuits