diff --git a/api/services/telephony/providers/telnyx/provider.py b/api/services/telephony/providers/telnyx/provider.py
index dcbc515..1c9c41f 100644
--- a/api/services/telephony/providers/telnyx/provider.py
+++ b/api/services/telephony/providers/telnyx/provider.py
@@ -25,6 +25,14 @@ if TYPE_CHECKING:
     from fastapi import WebSocket
 
 
+def normalize_event_type(event_type: str) -> str:
+    """Telnyx delivers event types with either dots or underscores
+    (e.g. ``streaming.started`` vs ``streaming_started``). Normalize to the
+    dotted form so all downstream matching can use a single canonical shape.
+    """
+    return (event_type or "").replace("_", ".")
+
+
 class TelnyxProvider(TelephonyProvider):
     """
     Telnyx implementation of TelephonyProvider.
@@ -187,7 +195,7 @@ class TelnyxProvider(TelephonyProvider):
     def parse_status_callback(self, data: Dict[str, Any]) -> Dict[str, Any]:
         """Parse Telnyx webhook event data into generic format."""
         event_data = data.get("data", data)
-        event_type = event_data.get("event_type", "")
+        event_type = normalize_event_type(event_data.get("event_type", ""))
         payload = event_data.get("payload", {})
 
         status = self._resolve_status(event_type, payload)
@@ -378,7 +386,7 @@ class TelnyxProvider(TelephonyProvider):
         # Check for Telnyx event structure
         data = webhook_data.get("data", {})
         if data.get("record_type") == "event" and "event_type" in data:
-            event_type = data.get("event_type", "")
+            event_type = normalize_event_type(data.get("event_type", ""))
             if event_type.startswith("call."):
                 return True
 
@@ -401,7 +409,7 @@ class TelnyxProvider(TelephonyProvider):
             from_number=TelnyxProvider.normalize_phone_number(payload.get("from", "")),
             to_number=TelnyxProvider.normalize_phone_number(payload.get("to", "")),
             direction=direction,
-            call_status=data.get("event_type", ""),
+            call_status=normalize_event_type(data.get("event_type", "")),
             account_id=payload.get("connection_id"),
             raw_data=webhook_data,
         )
diff --git a/api/services/telephony/providers/telnyx/routes.py b/api/services/telephony/providers/telnyx/routes.py
index 5e02030..1e878df 100644
--- a/api/services/telephony/providers/telnyx/routes.py
+++ b/api/services/telephony/providers/telnyx/routes.py
@@ -11,6 +11,7 @@ from loguru import logger
 
 from api.db import db_client
 from api.services.telephony.factory import get_telephony_provider
+from api.services.telephony.providers.telnyx.provider import normalize_event_type
 from api.services.telephony.status_processor import (
     StatusCallbackRequest,
     _process_status_update,
@@ -37,9 +38,11 @@ async def handle_telnyx_events(
         f"[run {workflow_run_id}] Received Telnyx event: {json.dumps(event_data)}"
     )
 
-    # Extract event type from Telnyx envelope
+    # Extract event type from Telnyx envelope. Telnyx sometimes delivers the
+    # type with underscores (``streaming_started``) instead of dots
+    # (``streaming.started``); normalize so downstream comparisons match either.
     data = event_data.get("data", {})
-    event_type = data.get("event_type", "")
+    event_type = normalize_event_type(data.get("event_type", ""))
 
     # Skip streaming events — they're informational only
     if event_type in ("streaming.started", "streaming.stopped"):
diff --git a/api/services/telephony/providers/telnyx/transport.py b/api/services/telephony/providers/telnyx/transport.py
index fb603f5..f47d0c3 100644
--- a/api/services/telephony/providers/telnyx/transport.py
+++ b/api/services/telephony/providers/telnyx/transport.py
@@ -45,8 +45,8 @@ async def create_transport(
         stream_id=stream_id,
         call_control_id=call_control_id,
         api_key=api_key,
-        inbound_encoding="PCMU",       # Dograh → Telnyx; matches stream_bidirectional_codec
-        outbound_encoding=encoding,    # Telnyx → Dograh; from media_format.encoding
+        inbound_encoding="PCMU",  # Dograh → Telnyx; matches stream_bidirectional_codec
+        outbound_encoding=encoding,  # Telnyx → Dograh; from media_format.encoding
     )
 
     mixer = await build_audio_out_mixer(