diff -Nur asterisk.old/apps/app_queue.c asterisk/apps/app_queue.c
--- asterisk.old/apps/app_queue.c	2005-05-09 19:16:01.000000000 +0200
+++ asterisk/apps/app_queue.c	2005-07-20 13:56:37.000000000 +0200
@@ -295,6 +295,7 @@
 	char sound_reporthold[80];	/* Sound file: "Hold time" (def. queue-reporthold) */
 
 	int count;			/* How many entries */
+	int onlyone;			/* Only one agent, many devices */
 	int maxlen;			/* Max number of entries */
 	int wrapuptime;			/* Wrapup Time */
 
@@ -480,6 +481,7 @@
 	int res = -1;
 	int pos = 0;
 	int inserted = 0;
+	struct member *mem = NULL;
 
 	ast_mutex_lock(&qlock);
 	for (q = queues; q; q = q->next) {
@@ -495,13 +497,19 @@
 			else if (q->maxlen && (q->count >= q->maxlen))
 				*reason = QUEUE_FULL;
 			else {
-				/* There's space for us, put us at the right position inside
-				 * the queue. 
-				 * Take into account the priority of the calling user */
-				inserted = 0;
-				prev = NULL;
-				cur = q->head;
-				while(cur) {
+				int inuse = 0;
+				if (q->onlyone == 1) /* verifico se qualche membro è attivo */
+				  for (mem = q->members; mem; mem = mem->next) {
+				    if (mem->status == AST_DEVICE_INUSE) { *reason = QUEUE_FULL; inuse=1; break; }
+				}
+				if (inuse==0) {
+ 	 			  /* There's space for us, put us at the right position inside
+				   * the queue. 
+				   * Take into account the priority of the calling user */
+				  inserted = 0;
+				  prev = NULL;
+				  cur = q->head;
+				  while(cur) {
 					/* We have higher priority than the current user, enter
 					 * before him, after all the other users with priority
 					 * higher or equal to our priority. */
@@ -512,16 +520,16 @@
 					cur->pos = ++pos;
 					prev = cur;
 					cur = cur->next;
-				}
-				/* No luck, join at the end of the queue */
-				if (!inserted)
-					insert_entry(q, prev, qe, &pos);
-				strncpy(qe->moh, q->moh, sizeof(qe->moh) - 1);
-				strncpy(qe->announce, q->announce, sizeof(qe->announce) - 1);
-				strncpy(qe->context, q->context, sizeof(qe->context) - 1);
-				q->count++;
-				res = 0;
-				manager_event(EVENT_FLAG_CALL, "Join", 
+				  }
+				  /* No luck, join at the end of the queue */
+				  if (!inserted)
+				 	insert_entry(q, prev, qe, &pos);
+				  strncpy(qe->moh, q->moh, sizeof(qe->moh) - 1);
+				  strncpy(qe->announce, q->announce, sizeof(qe->announce) - 1);
+				  strncpy(qe->context, q->context, sizeof(qe->context) - 1);
+				  q->count++;
+				  res = 0;
+				  manager_event(EVENT_FLAG_CALL, "Join", 
 					"Channel: %s\r\nCallerID: %s\r\nCallerIDName: %s\r\nQueue: %s\r\nPosition: %d\r\nCount: %d\r\n",
 					qe->chan->name, 
 					qe->chan->cid.cid_num ? qe->chan->cid.cid_num : "unknown",
@@ -530,9 +538,10 @@
 #if 0
 ast_log(LOG_NOTICE, "Queue '%s' Join, Channel '%s', Position '%d'\n", q->name, qe->chan->name, qe->pos );
 #endif
-			}
-			ast_mutex_unlock(&q->lock);
-			break;
+			       }
+			     }
+			     ast_mutex_unlock(&q->lock);
+			     break;
 		}
 	}
 	ast_mutex_unlock(&qlock);
@@ -2547,6 +2556,7 @@
 				q->retry = DEFAULT_RETRY;
 				q->timeout = -1;
 				q->maxlen = 0;
+				q->onlyone = 0; /* default false onlyone */
 				q->announcefrequency = 0;
 				q->announceholdtime = 0;
 				q->roundingseconds = 0; /* Default - don't announce seconds */
@@ -2650,6 +2660,8 @@
 						q->wrapuptime = atoi(var->value);
 					} else if (!strcasecmp(var->name, "maxlen")) {
 						q->maxlen = atoi(var->value);
+					} else if (!strcasecmp(var->name, "onlyone")) {
+						q->onlyone = atoi(var->value);
 					} else if (!strcasecmp(var->name, "servicelevel")) {
 						q->servicelevel= atoi(var->value);
 					} else if (!strcasecmp(var->name, "strategy")) {
@@ -2697,6 +2709,8 @@
 					q->timeout = DEFAULT_TIMEOUT;
 				if (q->maxlen < 0)
 					q->maxlen = 0;
+				if (q->onlyone != 0)
+					q->onlyone = 1;
 				if (!new) 
 					ast_mutex_unlock(&q->lock);
 				if (new) {
Binary files asterisk.old/apps/app_queue.o and asterisk/apps/app_queue.o differ
Binary files asterisk.old/apps/app_queue.so and asterisk/apps/app_queue.so differ