diff --git a/src/conference/conference-interface.h b/src/conference/conference-interface.h
new file mode 100644
index 000000000..016313cf8
--- /dev/null
+++ b/src/conference/conference-interface.h
@@ -0,0 +1,46 @@
+/*
+ * conference-interface.h
+ * Copyright (C) 2017  Belledonne Communications SARL
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _CONFERENCE_INTERFACE_H_
+#define _CONFERENCE_INTERFACE_H_
+
+#include <list>
+#include <memory>
+
+#include "address/address.h"
+#include "conference/participant.h"
+#include "conference/params/call-session-params.h"
+
+// =============================================================================
+
+LINPHONE_BEGIN_NAMESPACE
+
+class ConferenceInterface {
+public:
+	virtual std::shared_ptr<Participant> addParticipant (const Address &addr, const std::shared_ptr<CallSessionParams> params, bool hasMedia) = 0;
+	virtual void addParticipants (const std::list<const Address> &addresses, const std::shared_ptr<CallSessionParams> params, bool hasMedia) = 0;
+	virtual const std::string& getId () const = 0;
+	virtual int getNbParticipants () const = 0;
+	virtual std::list<std::shared_ptr<Participant>> getParticipants () const = 0;
+	virtual void removeParticipant (const std::shared_ptr<Participant> participant) = 0;
+	virtual void removeParticipants (const std::list<const std::shared_ptr<Participant>> participants) = 0;
+};
+
+LINPHONE_END_NAMESPACE
+
+#endif // ifndef _CONFERENCE_INTERFACE_H_
diff --git a/src/conference/conference-p.h b/src/conference/conference-p.h
index 6de840e21..52036702b 100644
--- a/src/conference/conference-p.h
+++ b/src/conference/conference-p.h
@@ -61,8 +61,10 @@ private:
 	LinphoneCore *core = nullptr;
 	CallListener *callListener = nullptr;
 
-	std::shared_ptr<Participant> me = nullptr;
 	std::shared_ptr<Participant> activeParticipant = nullptr;
+	std::string id;
+	std::shared_ptr<Participant> me = nullptr;
+	std::list<std::shared_ptr<Participant>> participants;
 
 	L_DECLARE_PUBLIC(Conference);
 };
diff --git a/src/conference/conference.cpp b/src/conference/conference.cpp
index 84409427d..f6abff333 100644
--- a/src/conference/conference.cpp
+++ b/src/conference/conference.cpp
@@ -52,7 +52,7 @@ void ConferencePrivate::callSessionSetTerminated (const CallSession &session) {
 		callListener->callSetTerminated();
 }
 
-void ConferencePrivate::callSessionStateChanged (const CallSession &session, LinphoneCallState state, const std::string &message) {
+void ConferencePrivate::callSessionStateChanged (const CallSession &session, LinphoneCallState state, const string &message) {
 	if (callListener)
 		callListener->callStateChanged(state, message);
 }
@@ -62,7 +62,7 @@ void ConferencePrivate::incomingCallSessionStarted (const CallSession &session)
 		callListener->incomingCallStarted();
 }
 
-void ConferencePrivate::encryptionChanged (const CallSession &session, bool activated, const std::string &authToken) {
+void ConferencePrivate::encryptionChanged (const CallSession &session, bool activated, const string &authToken) {
 	if (callListener)
 		callListener->encryptionChanged(activated, authToken);
 }
@@ -109,6 +109,33 @@ shared_ptr<Participant> Conference::addParticipant (const Address &addr, const s
 	return d->activeParticipant;
 }
 
+void Conference::addParticipants (const list<const Address> &addresses, const shared_ptr<CallSessionParams> params, bool hasMedia) {
+	// TODO
+}
+
+const string& Conference::getId () const {
+	L_D(const Conference);
+	return d->id;
+}
+
+int Conference::getNbParticipants () const {
+	// TODO
+	return 1;
+}
+
+list<shared_ptr<Participant>> Conference::getParticipants () const {
+	L_D(const Conference);
+	return d->participants;
+}
+
+void Conference::removeParticipant (const shared_ptr<Participant> participant) {
+	// TODO
+}
+
+void Conference::removeParticipants (const list<const shared_ptr<Participant>> participants) {
+	// TODO
+}
+
 shared_ptr<Participant> Conference::getActiveParticipant () const {
 	L_D(const Conference);
 	return d->activeParticipant;
diff --git a/src/conference/conference.h b/src/conference/conference.h
index a65535954..3b1a85920 100644
--- a/src/conference/conference.h
+++ b/src/conference/conference.h
@@ -24,6 +24,7 @@
 #include "object/object.h"
 #include "address/address.h"
 #include "call/call-listener.h"
+#include "conference/conference-interface.h"
 #include "conference/params/call-session-params.h"
 #include "conference/participant.h"
 
@@ -36,16 +37,22 @@ LINPHONE_BEGIN_NAMESPACE
 class ConferencePrivate;
 class CallSessionPrivate;
 
-class Conference : public Object {
+class Conference : public Object, public ConferenceInterface {
 	friend class CallSessionPrivate;
 
 public:
-	//Conference (CallListener *listener = nullptr);
-
-	std::shared_ptr<Participant> addParticipant (const Address &addr, const std::shared_ptr<CallSessionParams> params, bool hasMedia);
 	std::shared_ptr<Participant> getActiveParticipant () const;
 	std::shared_ptr<Participant> getMe () const;
 
+	/* ConferenceInterface */
+	virtual std::shared_ptr<Participant> addParticipant (const Address &addr, const std::shared_ptr<CallSessionParams> params, bool hasMedia);
+	virtual void addParticipants (const std::list<const Address> &addresses, const std::shared_ptr<CallSessionParams> params, bool hasMedia);
+	virtual const std::string& getId () const;
+	virtual int getNbParticipants () const;
+	virtual std::list<std::shared_ptr<Participant>> getParticipants () const;
+	virtual void removeParticipant (const std::shared_ptr<Participant> participant);
+	virtual void removeParticipants (const std::list<const std::shared_ptr<Participant>> participants);
+
 protected:
 	explicit Conference (ConferencePrivate &p, LinphoneCore *core, const Address &myAddress, CallListener *listener = nullptr);