diff --git a/linphone.conf b/linphone.conf
index a67611b..330e3df 100644
--- a/linphone.conf
+++ b/linphone.conf
@@ -17,3 +17,6 @@ firewall_policy=2
 mtu=0
 download_bw=0
 upload_bw=0
+
+[misc]
+max_calls=1