diff --git a/modules/clan/phonebox/default.nix b/modules/clan/phonebox/default.nix
index d0e3931..981289d 100644
--- a/modules/clan/phonebox/default.nix
+++ b/modules/clan/phonebox/default.nix
@@ -74,6 +74,22 @@
                 max_contacts=1
               '';
 
+            genLocalSIPEndpointV6 =
+              { localNumber }:
+              ''
+                [${localNumber}](internal_endpoint)
+                transport=transport-udp6
+                aors=${localNumber}
+                auth=${localNumber}
+
+                [${localNumber}](userpass_auth)
+                username=${localNumber}
+                password=${localNumber}
+
+                [${localNumber}](dynamiic_aor)
+                max_contacts=1
+              '';
+
             genLocalExtenConf =
               { localNumber }:
               ''
@@ -324,7 +340,6 @@
                       [base_endpoint](!)
                       type=endpoint
                       transport=transport-udp
-                      transport=transport-udp6
                       disallow=all
                       allow=ulaw,alaw,g722,gsm
                       direct_media=no
@@ -348,7 +363,7 @@
                       localNumber = config.clan.core.vars.generators.phonebox.files.ata-local-number.value;
                     })
                     + lib.concatStringsSep "\n" (
-                      builtins.map (number: genLocalSIPEndpoint { localNumber = number; }) settings.extraClientNumbers
+                      builtins.map (number: genLocalSIPEndpointV6 { localNumber = number; }) settings.extraClientNumbers
                     )
                     + serverConf;
                 };