This read-write value sets the maximum number of unacknowledged restarts to send before the switch declares a signaling failure on this port's Q.93B (ATM UNI signaling protocol) session, i.e., how many retry attempts of the restart procedure are tolerated before giving up and flagging the signaling link as failed. A higher value makes the switch more tolerant of transient signaling glitches before declaring failure, while a lower value fails faster but risks flagging brief hiccups as full failures. An engineer on a signaling link known to have occasional transient restart-response delays would increase svcAtmConfigQ93bMaxRestart to avoid the switch prematurely declaring a signaling failure during those brief hiccups.