In a 3-0 vote, the commissioners adopted changes to its telemarketing rules that:

-- Require telemarketers to obtain prior written consent before placing robo-calls to consumers,

-- Eliminate the exemption for companies that have an "established business relationship" with consumers,

-- Require telemarketers to provide an automated, interactive opt-out mechanism during each robocall so consumers can immediately tell the telemarketer to stop calling and

-- Strictly limit the number of so-called dead-air calls in which consumers answer phones and hear nothing.