diff --git a/.env.production b/.env.production
index 1d88f8f..8789b4b 100644
--- a/.env.production
+++ b/.env.production
@@ -1,4 +1,9 @@
 # EC2 deployment — Caddy reverse-proxies /auth/* and /api/* to the sidecar
 # on the same domain, so VITE_API_URL is empty (same-origin).
-# SIP config is per-agent from the Agent entity (returned at login), not env vars.
 VITE_API_URL=
+
+# SIP defaults — used as fallback if login response doesn't include agent config.
+# Per-agent SIP config from the Agent entity (returned at login) takes precedence.
+VITE_SIP_URI=sip:523590@blr-pub-rtc4.ozonetel.com
+VITE_SIP_PASSWORD=523590
+VITE_SIP_WS_SERVER=wss://blr-pub-rtc4.ozonetel.com:444