+.BR -w | --waittime\ < sec >
+This delay is maximum time allowed silently waiting for incoming data.
+After approx 30 minutes of waiting for Nokia 9110 data it will turn off
+its FaxModem feature disabling any further reading of messages.
+After such idle time \fBmdsms\fP will also reinitialize the modem to
+handle the case where the modem was silently powercycled in the meanwhile
+loosing its initial settings done by \fBmdsms\fP during its startup.
+The default value is
+.BR DEF_WAITTIME s.
+.TP