In early 1981, the FCC announced that it would approve two licenses in each wireless market: a non-wireline company (which became known as the "A" side carrier), and a wireline company (the "B" side ...
A feature found on cellular telephones permitting the user (when roaming away from home) to select either the "A" (non-wireline) carrier or the "B" (wireline) carrier.
13 用語
