diff --git a/apps/asterisk/configmap.yaml b/apps/asterisk/configmap.yaml
index 3d2c55f..0aaed6c 100644
--- a/apps/asterisk/configmap.yaml
+++ b/apps/asterisk/configmap.yaml
@@ -40,6 +40,12 @@ data:
     type=transport
     protocol=udp
     bind=0.0.0.0:5060
+    ; NAT: internal phones see node IP, Twilio sees public IP
+    local_net=10.0.0.0/8
+    local_net=172.16.0.0/12
+    local_net=192.168.0.0/16
+    external_media_address=74.40.140.28
+    external_signaling_address=74.40.140.28
 
     ; ===== Twilio SIP Trunk =====
     [twilio-trunk]