diff --git a/hosts/pbx/services/fieldpoc/default.nix b/hosts/pbx/services/fieldpoc/default.nix
index 17c9af7..bd63f23 100644
--- a/hosts/pbx/services/fieldpoc/default.nix
+++ b/hosts/pbx/services/fieldpoc/default.nix
@@ -45,9 +45,18 @@ in {
   ];
 
   services = {
-    yate.config.yrtpchan.general = {
-      minport = rtpPorts.from;
-      maxport = rtpPorts.to;
+    yate.config = {
+      yrtpchan.general = {
+        minport = rtpPorts.from;
+        maxport = rtpPorts.to;
+      };
+      ysipchan = {
+        "listener voice" = {
+          addr = (builtins.elemAt config.networking.interfaces.voice.ipv4.addresses 0).address;
+          type = "udp";
+          port = 5060;
+        };
+      };
     };
 
     fieldpoc = {
diff --git a/hosts/pbx/services/public-ip4-tunnel.nix b/hosts/pbx/services/public-ip4-tunnel.nix
index 061b2db..93ab81e 100644
--- a/hosts/pbx/services/public-ip4-tunnel.nix
+++ b/hosts/pbx/services/public-ip4-tunnel.nix
@@ -19,11 +19,11 @@ in {
   };
 
   services.yate.config.ysipchan = {
-    general.rtp_localip = externalIp;
     general = {
       addr = externalIp;
       type = "udp";
       port = 5060;
+      rtp_localip = externalIp;
     };
   };