--- isdn_lib.c	2008-10-09 21:18:48.781250000 +0200
+++ isdn_lib_fix_proposal.c	2008-10-09 21:17:40.437500000 +0200
@@ -3133,16 +3133,25 @@
 {
 	struct timeval now;
 	gettimeofday(&now, NULL);
-	if (!bc->in_use) {
-		if (misdn_lib_port_is_pri(bc->port) && bc->last_used.tv_sec == now.tv_sec ) {
-			cb_log(2,bc->port, "channel with stid:%x for one second still in use! (n:%d lu:%d)\n", bc->b_stid, (int) now.tv_sec, (int) bc->last_used.tv_sec);
-			return 1;
-		}
-	}
-	return 0;
+   if (misdn_lib_port_is_pri(bc->port)) {
+	   if (bc->in_use) {
+         return 0;
+      }
+      else {
+         struct timeval now;
+         gettimeofday(&now, NULL);
+         if(bc->last_used.tv_sec == now.tv_sec ) {
+		      cb_log(2,bc->port, "channel with stid:%x for one second still in use! (n:%d lu:%d)\n", bc->b_stid, (int) now.tv_sec, (int) bc->last_used.tv_sec);
+		      return 0;
+         }
+         return 1;
+      }
+   }
+   else {
+      return ((bc->in_use) ? 0:1);
+   }
 }
 
-
 static void prepare_bc(struct misdn_bchannel*bc, int channel)
 {
 	bc->channel = channel;
@@ -3188,7 +3197,7 @@
 			if (channel > 0) {
 				if (channel <= stack->b_num) {
 					for (i = 0; i < stack->b_num; i++) {
-						if ( test_inuse(&stack->bc[i]) && stack->bc[i].channel == channel) {
+						if ( (test_inuse(&stack->bc[i])==0) && stack->bc[i].channel == channel) {
 							cb_log(0,port,"Requested channel:%d on port:%d is already in use\n",channel, port);
 							return NULL;
 						}