diff --git a/satrs-example/src/pus/action.rs b/satrs-example/src/pus/action.rs
index 8f056d9..c2bfc1f 100644
--- a/satrs-example/src/pus/action.rs
+++ b/satrs-example/src/pus/action.rs
@@ -3,8 +3,8 @@ use satrs::action::{ActionRequest, ActionRequestVariant};
 use satrs::params::WritableToBeBytes;
 use satrs::pool::{SharedStaticMemoryPool, StoreAddr};
 use satrs::pus::action::{
-    ActionReplyPus, ActionReplyPusWithActionId, ActionRequestWithId, ActivePusActionRequestStd,
-    DefaultActiveActionRequestMap,
+    ActionReplyPus, ActionReplyPusWithActionId, ActionRequestWithId, ActionRequestorBoundedMpsc,
+    ActionRequestorMpsc, ActivePusActionRequestStd, DefaultActiveActionRequestMap,
 };
 use satrs::pus::verification::{
     self, FailParams, FailParamsWithStep, TcStateAccepted,
@@ -18,7 +18,7 @@ use satrs::pus::{
     PusTcToRequestConverter, TmAsVecSenderWithId, TmAsVecSenderWithMpsc,
     TmInSharedPoolSenderWithBoundedMpsc, TmInSharedPoolSenderWithId,
 };
-use satrs::request::{GenericMessage, TargetAndApidId};
+use satrs::request::{GenericMessage, MessageReceiver, MessageSender, TargetAndApidId};
 use satrs::spacepackets::ecss::tc::PusTcReader;
 use satrs::spacepackets::ecss::{EcssEnumU16, PusPacket};
 use satrs::tmtc::tm_helper::SharedTmPool;
@@ -29,7 +29,7 @@ use std::time::Duration;
 
 use crate::requests::GenericRequestRouter;
 
-use super::PusTargetedRequestService;
+use super::{generic_pus_request_timeout_handler, PusTargetedRequestService};
 
 pub struct ActionReplyHandler {
     fail_data_buf: [u8; 128],
@@ -50,8 +50,9 @@ impl PusReplyHandler<ActivePusActionRequestStd, ActionReplyPusWithActionId> for
         &mut self,
         reply: &GenericMessage<ActionReplyPusWithActionId>,
         _tm_sender: &impl EcssTmSenderCore,
-    ) {
+    ) -> Result<(), Self::Error> {
         log::warn!("received unexpected reply for service 8: {reply:?}");
+        Ok(())
     }
 
     fn handle_reply(
@@ -115,15 +116,20 @@ impl PusReplyHandler<ActivePusActionRequestStd, ActionReplyPusWithActionId> for
         Ok(remove_entry)
     }
 
-    /*
-    fn timeout_callback(&self, active_request: &ActiveRequestType) {
-        log::warn!("timeout for active request {active_request} on service {SERVICE}");
+    fn handle_request_timeout(
+        &mut self,
+        active_request: &ActivePusActionRequestStd,
+        verification_handler: &impl VerificationReportingProvider,
+        time_stamp: &[u8],
+        _tm_sender: &impl EcssTmSenderCore,
+    ) -> Result<(), Self::Error> {
+        generic_pus_request_timeout_handler(
+            active_request,
+            verification_handler,
+            time_stamp,
+            "action",
+        )
     }
-
-    fn timeout_error_code(&self) -> satrs::res_code::ResultU16 {
-        REQUEST_TIMEOUT
-    }
-    */
 }
 
 #[derive(Default)]
@@ -194,12 +200,13 @@ pub fn create_action_service_static(
     verif_reporter: VerificationReporterWithSharedPoolMpscBoundedSender,
     tc_pool: SharedStaticMemoryPool,
     pus_action_rx: mpsc::Receiver<EcssTcAndToken>,
-    action_router: GenericRequestRouter,
+    action_router: ActionRequestorBoundedMpsc,
 ) -> Pus8Wrapper<
     MpscTcReceiver,
     TmInSharedPoolSenderWithBoundedMpsc,
     EcssTcInSharedStoreConverter,
     VerificationReporterWithSharedPoolMpscBoundedSender,
+    mpsc::SyncSender<GenericMessage<ActionRequest>>,
 > {
     let action_srv_tm_sender = TmInSharedPoolSenderWithId::new(
         TmSenderId::PusAction as ChannelId,
@@ -221,11 +228,11 @@ pub fn create_action_service_static(
             EcssTcInSharedStoreConverter::new(tc_pool.clone(), 2048),
         ),
         ExampleActionRequestConverter::default(),
-        action_router,
         // TODO: Implementation which does not use run-time allocation? Maybe something like
         // a bounded wrapper which pre-allocates using [HashMap::with_capacity]..
         DefaultActiveActionRequestMap::default(),
         ActionReplyHandler::default(),
+        action_router,
     );
     Pus8Wrapper {
         action_request_handler,
@@ -236,12 +243,13 @@ pub fn create_action_service_dynamic(
     tm_funnel_tx: mpsc::Sender<Vec<u8>>,
     verif_reporter: VerificationReporterWithVecMpscSender,
     pus_action_rx: mpsc::Receiver<EcssTcAndToken>,
-    action_router: GenericRequestRouter,
+    action_router: ActionRequestorMpsc,
 ) -> Pus8Wrapper<
     MpscTcReceiver,
     TmAsVecSenderWithMpsc,
     EcssTcInVecConverter,
     VerificationReporterWithVecMpscSender,
+    mpsc::Sender<GenericMessage<ActionRequest>>,
 > {
     let action_srv_tm_sender = TmAsVecSenderWithId::new(
         TmSenderId::PusAction as ChannelId,
@@ -262,42 +270,21 @@ pub fn create_action_service_dynamic(
             EcssTcInVecConverter::default(),
         ),
         ExampleActionRequestConverter::default(),
-        action_router,
         DefaultActiveActionRequestMap::default(),
         ActionReplyHandler::default(),
+        action_router,
     );
     Pus8Wrapper {
         action_request_handler,
     }
 }
 
-/*
-#[derive(Default)]
-pub struct PusActionReplyHook {}
-
-impl ReplyHandlerHook<ActivePusActionRequest, ActionReplyPusWithActionId> for PusActionReplyHook {
-    fn handle_unexpected_reply(
-        &mut self,
-        reply: &satrs::request::GenericMessage<ActionReplyPusWithActionId>,
-    ) {
-        println!("received unexpected action reply {:?}", reply);
-    }
-
-    fn timeout_callback(&self, active_request: &ActivePusActionRequest) {
-        println!("active request {active_request:?} timed out");
-    }
-
-    fn timeout_error_code(&self) -> satrs::res_code::ResultU16 {
-        todo!()
-    }
-}
-*/
-
 pub struct Pus8Wrapper<
     TcReceiver: EcssTcReceiverCore,
     TmSender: EcssTmSenderCore,
     TcInMemConverter: EcssTcInMemConverter,
     VerificationReporter: VerificationReportingProvider,
+    RequestSender: MessageSender<ActionRequest>,
 > {
     pub(crate) action_request_handler: PusTargetedRequestService<
         TcReceiver,
@@ -308,7 +295,8 @@ pub struct Pus8Wrapper<
         ActionReplyHandler,
         DefaultActiveActionRequestMap,
         ActivePusActionRequestStd,
-        ActionRequestWithId,
+        RequestSender,
+        ActionRequest,
         ActionReplyPusWithActionId,
     >,
 }
@@ -318,7 +306,8 @@ impl<
         TmSender: EcssTmSenderCore,
         TcInMemConverter: EcssTcInMemConverter,
         VerificationReporter: VerificationReportingProvider,
-    > Pus8Wrapper<TcReceiver, TmSender, TcInMemConverter, VerificationReporter>
+        RequestSender: MessageSender<ActionRequest>,
+    > Pus8Wrapper<TcReceiver, TmSender, TcInMemConverter, VerificationReporter, RequestSender>
 {
     pub fn handle_next_packet(&mut self, time_stamp: &[u8]) -> bool {
         match self.action_request_handler.handle_one_tc(time_stamp) {
diff --git a/satrs-example/src/pus/hk.rs b/satrs-example/src/pus/hk.rs
index ed151be..30eed3c 100644
--- a/satrs-example/src/pus/hk.rs
+++ b/satrs-example/src/pus/hk.rs
@@ -8,9 +8,10 @@ use satrs::pus::verification::{
 use satrs::pus::{
     ActivePusRequestStd, ActiveRequestProvider, DefaultActiveRequestMap, EcssTcAndToken,
     EcssTcInMemConverter, EcssTcInSharedStoreConverter, EcssTcInVecConverter, EcssTcReceiverCore,
-    EcssTmSenderCore, MpscTcReceiver, PusPacketHandlerResult, PusPacketHandlingError,
-    PusReplyHandler, PusServiceHelper, PusTcToRequestConverter, TmAsVecSenderWithId,
-    TmAsVecSenderWithMpsc, TmInSharedPoolSenderWithBoundedMpsc, TmInSharedPoolSenderWithId,
+    EcssTmSenderCore, EcssTmtcError, MpscTcReceiver, PusPacketHandlerResult,
+    PusPacketHandlingError, PusReplyHandler, PusServiceHelper, PusTcToRequestConverter,
+    TmAsVecSenderWithId, TmAsVecSenderWithMpsc, TmInSharedPoolSenderWithBoundedMpsc,
+    TmInSharedPoolSenderWithId,
 };
 use satrs::request::TargetAndApidId;
 use satrs::spacepackets::ecss::tc::PusTcReader;
@@ -21,6 +22,7 @@ use satrs_example::config::{hk_err, tmtc_err, TcReceiverId, TmSenderId, PUS_APID
 use std::sync::mpsc::{self};
 use std::time::Duration;
 
+use crate::pus::generic_pus_request_timeout_handler;
 use crate::requests::GenericRequestRouter;
 
 use super::PusTargetedRequestService;
@@ -34,14 +36,15 @@ pub enum HkReply {
 pub struct HkReplyHandler {}
 
 impl PusReplyHandler<ActivePusRequestStd, HkReply> for HkReplyHandler {
-    type Error = ();
+    type Error = EcssTmtcError;
 
     fn handle_unexpected_reply(
         &mut self,
         reply: &satrs::request::GenericMessage<HkReply>,
         _tm_sender: &impl EcssTmSenderCore,
-    ) {
+    ) -> Result<(), Self::Error> {
         log::warn!("received unexpected reply for service 3: {reply:?}");
+        Ok(())
     }
 
     fn handle_reply(
@@ -61,6 +64,16 @@ impl PusReplyHandler<ActivePusRequestStd, HkReply> for HkReplyHandler {
         };
         Ok(true)
     }
+
+    fn handle_request_timeout(
+        &mut self,
+        active_request: &ActivePusRequestStd,
+        verification_handler: &impl VerificationReportingProvider,
+        time_stamp: &[u8],
+        _tm_sender: &impl EcssTmSenderCore,
+    ) -> Result<(), Self::Error> {
+        generic_pus_request_timeout_handler(active_request, verification_handler, time_stamp, "HK")
+    }
 }
 
 pub struct ExampleHkRequestConverter {
diff --git a/satrs-example/src/pus/mod.rs b/satrs-example/src/pus/mod.rs
index fd66d4f..38d6454 100644
--- a/satrs-example/src/pus/mod.rs
+++ b/satrs-example/src/pus/mod.rs
@@ -1,20 +1,22 @@
 use crate::requests::GenericRequestRouter;
 use crate::tmtc::MpscStoreAndSendError;
 use log::warn;
+use satrs::pus::action::ActivePusActionRequestStd;
 use satrs::pus::verification::{self, FailParams, VerificationReportingProvider};
 use satrs::pus::{
     ActiveRequestMapProvider, ActiveRequestProvider, EcssTcAndToken, EcssTcInMemConverter,
-    EcssTcReceiverCore, EcssTmSenderCore, GenericRoutingError, PusPacketHandlerResult,
-    PusPacketHandlingError, PusReplyHandler, PusRequestRouter, PusServiceHelper,
-    PusTcToRequestConverter, TcInMemory,
+    EcssTcReceiverCore, EcssTmSenderCore, EcssTmtcError, GenericRoutingError,
+    PusPacketHandlerResult, PusPacketHandlingError, PusReplyHandler, PusRequestRouter,
+    PusServiceHelper, PusTcToRequestConverter, TcInMemory,
 };
-use satrs::request::GenericMessage;
+use satrs::request::{GenericMessage, MessageReceiver, MessageSender, MessageSenderAndReceiver};
 use satrs::spacepackets::ecss::tc::PusTcReader;
 use satrs::spacepackets::ecss::PusServiceId;
 use satrs::spacepackets::time::cds::TimeProvider;
 use satrs::spacepackets::time::TimeWriter;
 use satrs_example::config::{tmtc_err, CustomPusServiceId};
-use std::sync::mpsc::Sender;
+use std::fmt::Debug;
+use std::sync::mpsc::{self, Sender};
 
 pub mod action;
 pub mod event;
@@ -82,18 +84,21 @@ pub struct PusTargetedRequestService<
     TcInMemConverter: EcssTcInMemConverter,
     VerificationReporter: VerificationReportingProvider,
     RequestConverter: PusTcToRequestConverter<ActiveRequestInfo, RequestType, Error = PusPacketHandlingError>,
-    ReplyHandler: PusReplyHandler<ActiveRequestInfo, ReplyType>,
+    ReplyHandler: PusReplyHandler<ActiveRequestInfo, ReplyType, Error = EcssTmtcError>,
     ActiveRequestMap: ActiveRequestMapProvider<ActiveRequestInfo>,
     ActiveRequestInfo: ActiveRequestProvider,
-    RequestType,
+    RequestSender: MessageSender<RequestType>,
+    RequestType: Send,
     ReplyType,
 > {
     pub service_helper:
         PusServiceHelper<TcReceiver, TmSender, TcInMemConverter, VerificationReporter>,
-    pub request_router: GenericRequestRouter,
+    //pub request_router: GenericRequestRouter,
     pub request_converter: RequestConverter,
     pub active_request_map: ActiveRequestMap,
-    pub reply_hook: ReplyHandler,
+    pub request_router_reply_receiver:
+        MessageSenderAndReceiver<RequestType, ReplyType, RequestSender, mpsc::Receiver<ReplyType>>,
+    pub reply_handler: ReplyHandler,
     phantom: std::marker::PhantomData<(RequestType, ActiveRequestInfo, ReplyType)>,
 }
 
@@ -103,10 +108,11 @@ impl<
         TcInMemConverter: EcssTcInMemConverter,
         VerificationReporter: VerificationReportingProvider,
         RequestConverter: PusTcToRequestConverter<ActiveRequestInfo, RequestType, Error = PusPacketHandlingError>,
-        ReplyHandler: PusReplyHandler<ActiveRequestInfo, ReplyType>,
+        ReplyHandler: PusReplyHandler<ActiveRequestInfo, ReplyType, Error = EcssTmtcError>,
         ActiveRequestMap: ActiveRequestMapProvider<ActiveRequestInfo>,
         ActiveRequestInfo: ActiveRequestProvider,
-        RequestType,
+        RequestSender: MessageSender<RequestType>,
+        RequestType: Send,
         ReplyType,
     >
     PusTargetedRequestService<
@@ -118,6 +124,7 @@ impl<
         ReplyHandler,
         ActiveRequestMap,
         ActiveRequestInfo,
+        RequestSender,
         RequestType,
         ReplyType,
     >
@@ -132,16 +139,21 @@ where
             VerificationReporter,
         >,
         request_converter: RequestConverter,
-        request_router: GenericRequestRouter,
         active_request_map: ActiveRequestMap,
         reply_hook: ReplyHandler,
+        request_router_reply_receiver: MessageSenderAndReceiver<
+            RequestType,
+            ReplyType,
+            RequestSender,
+            mpsc::Receiver<GenericMessage<ReplyType>>,
+        >,
     ) -> Self {
         Self {
             service_helper,
-            request_router,
             request_converter,
             active_request_map,
-            reply_hook,
+            reply_handler: reply_hook,
+            request_router_reply_receiver,
             phantom: std::marker::PhantomData,
         }
     }
@@ -166,9 +178,11 @@ where
             &self.service_helper.common.verification_handler,
         )?;
         let verif_request_id = verification::RequestId::new(&tc);
-        if let Err(e) =
-            self.request_router
-                .route(request_info.target_id(), request, ecss_tc_and_token.token)
+        if let Err(e) = self
+            .request_router_reply_receiver
+            .message_sender_map
+            .send_message(request_id, local_channel_id, target_channel_id, request)
+        // .(request_info.target_id(), request, ecss_tc_and_token.token)
         {
             let target_id = request_info.target_id();
             self.active_request_map
@@ -186,7 +200,66 @@ where
         Ok(PusPacketHandlerResult::RequestHandled)
     }
 
-    pub fn insert_reply(&mut self, reply: &GenericMessage<ReplyType>) {}
+    pub fn insert_reply(
+        &mut self,
+        reply: &GenericMessage<ReplyType>,
+        time_stamp: &[u8],
+    ) -> Result<(), EcssTmtcError> {
+        let active_req_opt = self.active_request_map.get(reply.request_id);
+        if active_req_opt.is_none() {
+            self.reply_handler
+                .handle_unexpected_reply(reply, &self.service_helper.common.tm_sender)?;
+        }
+        let active_request = active_req_opt.unwrap();
+        let request_finished = self
+            .reply_handler
+            .handle_reply(
+                reply,
+                active_request,
+                &self.service_helper.common.verification_handler,
+                time_stamp,
+                &self.service_helper.common.tm_sender,
+            )
+            .unwrap_or(false);
+        if request_finished {
+            self.active_request_map.remove(reply.request_id);
+        }
+        Ok(())
+    }
+
+    pub fn check_for_request_timeouts(&mut self) {
+        let mut requests_to_delete = Vec::new();
+        self.active_request_map
+            .for_each(|request_id, request_info| {
+                if request_info.has_timed_out() {
+                    requests_to_delete.push(*request_id);
+                }
+            });
+        if !requests_to_delete.is_empty() {
+            for request_id in requests_to_delete {
+                self.active_request_map.remove(request_id);
+            }
+        }
+    }
+}
+
+pub fn generic_pus_request_timeout_handler(
+    active_request: &(impl ActiveRequestProvider + Debug),
+    verification_handler: &impl VerificationReportingProvider,
+    time_stamp: &[u8],
+    service_str: &'static str,
+) -> Result<(), EcssTmtcError> {
+    log::warn!("timeout for active request {active_request:?} on {service_str} service");
+    verification_handler
+        .completion_failure(
+            active_request.token(),
+            FailParams::new(
+                time_stamp,
+                &satrs_example::config::tmtc_err::REQUEST_TIMEOUT,
+                &[],
+            ),
+        )
+        .map_err(|e| e.0)
 }
 
 impl<VerificationReporter: VerificationReportingProvider> PusReceiver<VerificationReporter> {
diff --git a/satrs/src/mode.rs b/satrs/src/mode.rs
index 5c83788..09b0920 100644
--- a/satrs/src/mode.rs
+++ b/satrs/src/mode.rs
@@ -375,7 +375,8 @@ pub mod alloc_mod {
         }
     }
 
-    /// Helper type defintion for a mode handler object which can send mode requests.
+    /// Helper type defintion for a mode handler object which can send mode requests and receive
+    /// mode replies.
     pub type ModeRequestorInterface<S, R> = MessageSenderAndReceiver<ModeRequest, ModeReply, S, R>;
 
     impl<S: MessageSender<ModeRequest>, R: MessageReceiver<ModeReply>> ModeRequestorInterface<S, R> {
diff --git a/satrs/src/pus/action.rs b/satrs/src/pus/action.rs
index 4bcb1eb..0a9d88e 100644
--- a/satrs/src/pus/action.rs
+++ b/satrs/src/pus/action.rs
@@ -75,11 +75,72 @@ impl GenericActionReplyPus {
 
 #[cfg(feature = "alloc")]
 #[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
-pub mod alloc_mod {}
+pub mod alloc_mod {
+    use crate::{
+        action::ActionRequest,
+        queue::GenericTargetedMessagingError,
+        request::{
+            GenericMessage, MessageReceiver, MessageSender, MessageSenderAndReceiver, RequestId,
+        },
+        ChannelId,
+    };
+
+    use super::ActionReplyPusWithActionId;
+
+    /// Helper type definition for a mode handler which can handle mode requests.
+    pub type ActionRequestHandlerInterface<S, R> =
+        MessageSenderAndReceiver<ActionReplyPusWithActionId, ActionRequest, S, R>;
+
+    impl<S: MessageSender<ActionReplyPusWithActionId>, R: MessageReceiver<ActionRequest>>
+        ActionRequestHandlerInterface<S, R>
+    {
+        pub fn try_recv_action_request(
+            &self,
+        ) -> Result<Option<GenericMessage<ActionRequest>>, GenericTargetedMessagingError> {
+            self.try_recv_message()
+        }
+
+        pub fn send_action_reply(
+            &self,
+            request_id: RequestId,
+            target_id: ChannelId,
+            reply: ActionReplyPusWithActionId,
+        ) -> Result<(), GenericTargetedMessagingError> {
+            self.send_message(request_id, target_id, reply)
+        }
+    }
+
+    /// Helper type defintion for a mode handler object which can send mode requests and receive
+    /// mode replies.
+    pub type ActionRequestorInterface<S, R> =
+        MessageSenderAndReceiver<ActionRequest, ActionReplyPusWithActionId, S, R>;
+
+    impl<S: MessageSender<ActionRequest>, R: MessageReceiver<ActionReplyPusWithActionId>>
+        ActionRequestorInterface<S, R>
+    {
+        pub fn try_recv_action_reply(
+            &self,
+        ) -> Result<Option<GenericMessage<ActionReplyPusWithActionId>>, GenericTargetedMessagingError>
+        {
+            self.try_recv_message()
+        }
+
+        pub fn send_action_request(
+            &self,
+            request_id: RequestId,
+            target_id: ChannelId,
+            request: ActionRequest,
+        ) -> Result<(), GenericTargetedMessagingError> {
+            self.send_message(request_id, target_id, request)
+        }
+    }
+}
 
 #[cfg(feature = "std")]
 #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
 pub mod std_mod {
+    use std::sync::mpsc;
+
     use crate::pus::{verification, DefaultActiveRequestMap};
 
     use super::*;
@@ -115,6 +176,39 @@ pub mod std_mod {
         }
     }
     pub type DefaultActiveActionRequestMap = DefaultActiveRequestMap<ActivePusActionRequestStd>;
+
+    pub type ActionRequestHandlerMpsc = ActionRequestHandlerInterface<
+        mpsc::Sender<GenericMessage<ActionReplyPusWithActionId>>,
+        mpsc::Receiver<GenericMessage<ActionRequest>>,
+    >;
+    pub type ActionRequestHandlerMpscBounded = ActionRequestHandlerInterface<
+        mpsc::SyncSender<GenericMessage<ActionReplyPusWithActionId>>,
+        mpsc::Receiver<GenericMessage<ActionRequest>>,
+    >;
+
+    pub type ActionRequestorMpsc = ActionRequestorInterface<
+        mpsc::Sender<GenericMessage<ActionRequest>>,
+        mpsc::Receiver<GenericMessage<ActionReplyPusWithActionId>>,
+    >;
+    pub type ActionRequestorBoundedMpsc = ActionRequestorInterface<
+        mpsc::SyncSender<GenericMessage<ActionRequest>>,
+        mpsc::Receiver<GenericMessage<ActionReplyPusWithActionId>>,
+    >;
+
+    /*
+    pub type ModeRequestorAndHandlerMpsc = ModeInterface<
+        mpsc::Sender<GenericMessage<ModeRequest>>,
+        mpsc::Receiver<GenericMessage<ModeReply>>,
+        mpsc::Sender<GenericMessage<ModeReply>>,
+        mpsc::Receiver<GenericMessage<ModeRequest>>,
+    >;
+    pub type ModeRequestorAndHandlerMpscBounded = ModeInterface<
+        mpsc::SyncSender<GenericMessage<ModeRequest>>,
+        mpsc::Receiver<GenericMessage<ModeReply>>,
+        mpsc::SyncSender<GenericMessage<ModeReply>>,
+        mpsc::Receiver<GenericMessage<ModeRequest>>,
+    >;
+    */
 }
 
 #[cfg(test)]
diff --git a/satrs/src/pus/mod.rs b/satrs/src/pus/mod.rs
index c0b11ef..93bbe6a 100644
--- a/satrs/src/pus/mod.rs
+++ b/satrs/src/pus/mod.rs
@@ -332,7 +332,15 @@ pub trait PusReplyHandler<ActiveRequestInfo: ActiveRequestProvider, ReplyType> {
         &mut self,
         reply: &GenericMessage<ReplyType>,
         tm_sender: &impl EcssTmSenderCore,
-    );
+    ) -> Result<(), Self::Error>;
+
+    fn handle_request_timeout(
+        &mut self,
+        active_request: &ActiveRequestInfo,
+        verification_handler: &impl VerificationReportingProvider,
+        time_stamp: &[u8],
+        tm_sender: &impl EcssTmSenderCore,
+    ) -> Result<(), Self::Error>;
 }
 
 #[cfg(feature = "alloc")]
diff --git a/satrs/src/pus/mode.rs b/satrs/src/pus/mode.rs
index 9e42124..cea2087 100644
--- a/satrs/src/pus/mode.rs
+++ b/satrs/src/pus/mode.rs
@@ -44,8 +44,6 @@ pub mod std_mod {
         fn can_not_reach_mode_result_code(&self) -> ResultU16;
     }
 
-    use super::{ModeReply, MODE_SERVICE_ID};
-
     /// Type definition for a PUS mode servicd reply handler which constrains the
     /// [PusServiceReplyHandler] active request and reply generics to the [ActiveActionRequest] and
     /// [ActionReplyPusWithIds] type.
@@ -174,10 +172,9 @@ mod tests {
 
     use crate::{
         mode::{
-            ModeAndSubmode, ModeReplySender, ModeRequest, ModeRequestSender,
+            ModeAndSubmode, ModeReply, ModeReplySender, ModeRequest, ModeRequestSender,
             ModeRequestorAndHandlerMpsc, ModeRequestorMpsc,
         },
-        pus::mode::ModeReply,
         request::GenericMessage,
     };