--- app_queue.c	2005-12-26 19:19:12.000000000 +0100
+++ app_queue.c-ri	2006-01-21 16:50:30.000000000 +0100
@@ -327,4 +327,5 @@
 		unsigned int maskmemberstatus:1;
 		unsigned int realtime:1;
+		unsigned int ringinuse:1;
 	int announcefrequency;          /*!< How often to announce their position */
 	int periodicannouncefrequency;	/*!< How often to play periodic announcement */
@@ -568,4 +569,5 @@
 	q->roundingseconds = 0; /* Default - don't announce seconds */
 	q->servicelevel = 0;
+	q->ringinuse = 1;
 	q->moh[0] = '\0';
 	q->announce[0] = '\0';
@@ -613,4 +615,6 @@
 		if (q->timeout < 0)
 			q->timeout = DEFAULT_TIMEOUT;
+	} else if (!strcasecmp(param, "ring-inuse")) {
+		q->ringinuse = ast_true(val);
 	} else if (!strcasecmp(param, "monitor-join")) {
 		q->monjoin = ast_true(val);
@@ -1340,5 +1344,14 @@
 		return 0;
 	}
-	
+
+	if ((qe->parent->ringinuse == 0) && (tmp->member->status == AST_DEVICE_INUSE)) {
+		if (option_debug)
+			ast_log(LOG_DEBUG, "%s in use, can't receive call\n", tmp->interface);
+		if (qe->chan->cdr)
+			ast_cdr_busy(qe->chan->cdr);
+		tmp->stillgoing = 0;
+		return 0;
+	}
+
 	if (tmp->member->paused) {
 		if (option_debug)