diff --git a/mgcp_mgw.cfg b/mgcp_mgw.cfg
index d219407..4699e96 100644
--- a/mgcp_mgw.cfg
+++ b/mgcp_mgw.cfg
@@ -2,5 +2,11 @@ mgcp
  local ip 172.18.0.20
  mgw ip 172.18.0.30
  rtp base 4000
- sdp audio payload number 123
- number endpoints 31
+
+ vtrunk mgw
+   sdp audio payload number 123
+   number endpoints 31
+
+ vtrunk foo
+   sdp audio payload number 123
+   number endpoints 31