This value sets the maximum number of unacknowledged control PDUs the SSCOP (QSaal) layer on this port may have outstanding before it declares the signaling connection lost, per the description. Because this threshold is what triggers the loss-of-connection state that cascades into RESTART and clears active SVCs, setting it too low makes the link overly sensitive to brief bursts of unacknowledged control traffic, while too high delays detection of a genuinely dead link. A typical MaxCC value is around 4 or 10 retries, so a link with occasional bursty loss might need this raised slightly to avoid false connection-loss declarations.