MVP777 RTP SLOT Each had the ability to interrupt lower-priority calls in progress if all trunks were busy. Autovon was replaced in the early 1990s by the Defense Switched Network; much of its infrastructure is now dismantled. Amateur radio equipment continues to be manufactured with 16-key DTMF keypads, keeping extra tones available for on-air use to control remote apparatus such as radio repeater stations.|Slot No Limit: Launching {Your own|Your individual|Your personal} {Affiliate program|Associates program}