diff --git a/vocode/streaming/action/worker.py b/vocode/streaming/action/worker.py
index b2dbd380c4..2b3e486b65 100644
--- a/vocode/streaming/action/worker.py
+++ b/vocode/streaming/action/worker.py
@@ -19,7 +19,7 @@
 from vocode.streaming.utils.state_manager import AbstractConversationStateManager
 
 
-class ActionsWorker(InterruptibleWorker):
+class ActionsWorker(InterruptibleWorker[InterruptibleEvent[ActionInput]]):
     consumer: AbstractWorker[InterruptibleEvent[ActionResultAgentInput]]
 
     def __init__(
@@ -48,16 +48,6 @@ async def process(self, item: InterruptibleEvent[ActionInput]):
                     conversation_id=action_input.conversation_id,
                     action_input=action_input,
                     action_output=action_output,
-                    vonage_uuid=(
-                        action_input.vonage_uuid
-                        if isinstance(action_input, VonagePhoneConversationActionInput)
-                        else None
-                    ),
-                    twilio_sid=(
-                        action_input.twilio_sid
-                        if isinstance(action_input, TwilioPhoneConversationActionInput)
-                        else None
-                    ),
                     is_quiet=action.quiet,
                 ),
                 is_interruptible=False,
diff --git a/vocode/streaming/agent/base_agent.py b/vocode/streaming/agent/base_agent.py
index e38de8e99b..ee09f0d642 100644
--- a/vocode/streaming/agent/base_agent.py
+++ b/vocode/streaming/agent/base_agent.py
@@ -44,6 +44,10 @@
 )
 from vocode.streaming.utils import unrepeating_randomizer
 from vocode.streaming.utils.speed_manager import SpeedManager
+from vocode.streaming.utils.state_manager import (
+    TwilioPhoneConversationStateManager,
+    VonagePhoneConversationStateManager,
+)
 from vocode.utils.sentry_utils import CustomSentrySpans, sentry_create_span
 
 if TYPE_CHECKING:
@@ -70,8 +74,6 @@ class AgentInputType(str, Enum):
 
 class AgentInput(TypedModel, type=AgentInputType.BASE.value):  # type: ignore
     conversation_id: str
-    vonage_uuid: Optional[str]
-    twilio_sid: Optional[str]
     agent_response_tracker: Optional[asyncio.Event] = None
 
     class Config:
@@ -515,24 +517,25 @@ def create_action_input(
     ) -> ActionInput:
         action_input: ActionInput
         if isinstance(action, VonagePhoneConversationAction):
-            assert (
-                agent_input.vonage_uuid is not None
-            ), "Cannot use VonagePhoneConversationActionFactory unless the attached conversation is a VonagePhoneConversation"
+            assert isinstance(
+                self.conversation_state_manager,
+                VonagePhoneConversationStateManager,
+            ), "Cannot use a VonagePhoneConversationAction unless the attached conversation is a VonagePhoneConversation"
             action_input = action.create_phone_conversation_action_input(
-                agent_input.conversation_id,
-                params,
-                agent_input.vonage_uuid,
-                user_message_tracker,
+                conversation_id=agent_input.conversation_id,
+                params=params,
+                vonage_uuid=self.conversation_state_manager.get_vonage_uuid(),
+                user_message_tracker=user_message_tracker,
             )
         elif isinstance(action, TwilioPhoneConversationAction):
-            assert (
-                agent_input.twilio_sid is not None
-            ), "Cannot use TwilioPhoneConversationActionFactory unless the attached conversation is a TwilioPhoneConversation"
+            assert isinstance(
+                self.conversation_state_manager, TwilioPhoneConversationStateManager
+            ), "Cannot use a TwilioPhoneConversationAction unless the attached conversation is a TwilioPhoneConversation"
             action_input = action.create_phone_conversation_action_input(
-                agent_input.conversation_id,
-                params,
-                agent_input.twilio_sid,
-                user_message_tracker,
+                conversation_id=agent_input.conversation_id,
+                params=params,
+                twilio_sid=self.conversation_state_manager.get_twilio_sid(),
+                user_message_tracker=user_message_tracker,
             )
         else:
             action_input = action.create_action_input(
diff --git a/vocode/streaming/streaming_conversation.py b/vocode/streaming/streaming_conversation.py
index 62fa590732..67291009e2 100644
--- a/vocode/streaming/streaming_conversation.py
+++ b/vocode/streaming/streaming_conversation.py
@@ -346,8 +346,6 @@ async def process(self, transcription: Transcription):
                     TranscriptionAgentInput(
                         transcription=transcription,
                         conversation_id=self.conversation.id,
-                        vonage_uuid=getattr(self.conversation, "vonage_uuid", None),
-                        twilio_sid=getattr(self.conversation, "twilio_sid", None),
                         agent_response_tracker=agent_response_tracker,
                     ),
                 )
diff --git a/vocode/streaming/telephony/conversation/abstract_phone_conversation.py b/vocode/streaming/telephony/conversation/abstract_phone_conversation.py
index 9dac564fcb..50859b9ee1 100644
--- a/vocode/streaming/telephony/conversation/abstract_phone_conversation.py
+++ b/vocode/streaming/telephony/conversation/abstract_phone_conversation.py
@@ -1,5 +1,5 @@
 from abc import abstractmethod
-from typing import Generic, Literal, Optional, TypeVar, Union
+from typing import TYPE_CHECKING, Generic, Literal, Optional, TypeVar, Union
 
 from fastapi import WebSocket
 from loguru import logger
@@ -18,6 +18,7 @@
 from vocode.streaming.transcriber.abstract_factory import AbstractTranscriberFactory
 from vocode.streaming.utils import create_conversation_id
 from vocode.streaming.utils.events_manager import EventsManager
+from vocode.streaming.utils.state_manager import PhoneConversationStateManager
 
 TelephonyOutputDeviceType = TypeVar(
     "TelephonyOutputDeviceType", bound=Union[TwilioOutputDevice, VonageOutputDevice]
@@ -28,7 +29,9 @@
 TelephonyProvider = Literal["twilio", "vonage"]
 
 
-class AbstractPhoneConversation(Generic[TelephonyOutputDeviceType]):
+class AbstractPhoneConversation(
+    AudioPipeline[TelephonyOutputDeviceType, PhoneConversationStateManager]
+):
     telephony_provider: TelephonyProvider
 
     def __init__(
@@ -59,5 +62,7 @@ async def attach_ws_and_start(self, ws: WebSocket):
         pass
 
     async def terminate(self):
-        self.pipeline.events_manager.publish_event(PhoneCallEndedEvent(conversation_id=self.id))
+        self.pipeline.events_manager.publish_event(
+            PhoneCallEndedEvent(conversation_id=self.pipeline.id)
+        )
         await self.pipeline.terminate()
diff --git a/vocode/streaming/utils/state_manager.py b/vocode/streaming/utils/state_manager.py
index 516965199f..bd69952152 100644
--- a/vocode/streaming/utils/state_manager.py
+++ b/vocode/streaming/utils/state_manager.py
@@ -148,6 +148,9 @@ def create_vonage_client(self):
             maybe_vonage_config=self._vonage_phone_conversation.vonage_config,
         )
 
+    def get_vonage_uuid(self):
+        return self._vonage_phone_conversation.vonage_uuid
+
 
 class TwilioPhoneConversationStateManager(PhoneConversationStateManager):
     def __init__(self, conversation: "TwilioPhoneConversation"):
@@ -162,3 +165,6 @@ def create_twilio_client(self):
             base_url=self._twilio_phone_conversation.base_url,
             maybe_twilio_config=self.get_twilio_config(),
         )
+
+    def get_twilio_sid(self):
+        return self._twilio_phone_conversation.twilio_sid