diff --git a/changelog/3629.fixed.md b/changelog/3629.fixed.md
new file mode 100644
index 000000000..12792f47d
--- /dev/null
+++ b/changelog/3629.fixed.md
@@ -0,0 +1 @@
+- Fixed `StopAsyncIteration` exceptions in `parse_telephony_websocket()` when WebSocket connections close before sending expected messages.
diff --git a/src/pipecat/runner/utils.py b/src/pipecat/runner/utils.py
index 2a56bb0f4..a3be74436 100644
--- a/src/pipecat/runner/utils.py
+++ b/src/pipecat/runner/utils.py
@@ -96,6 +96,9 @@ def _detect_transport_type_from_message(message_data: dict) -> str:
 async def parse_telephony_websocket(websocket: WebSocket):
     """Parse telephony WebSocket messages and return transport type and call data.
 
+    Args:
+        websocket: FastAPI WebSocket connection from telephony provider.
+
     Returns:
         tuple: (transport_type: str, call_data: dict)
 
@@ -136,6 +139,9 @@ async def parse_telephony_websocket(websocket: WebSocket):
                 "to": str,
             }
 
+    Raises:
+        ValueError: If WebSocket closes before sending any messages.
+
     Example usage::
 
         transport_type, call_data = await parse_telephony_websocket(websocket)