Verizon Wireless phones are programmed to send calls to voicemail after approximately 30 seconds; this may be 4 to 8 rings depending on your phone’s ringtone selection. These settings can no longer be modified. I apologize. - RobertC_VZW
Since I couldn't shorten the continuous racket I purchased an APP that blocks all the SPAM calls I've been getting that Verizon allows. What ever happened to no spam on cellular? The people that spam purchase the carriers or the politicians?