diff --git a/src/@types/global.d.ts b/src/@types/global.d.ts
index 91b91de90d..93be0fafc0 100644
--- a/src/@types/global.d.ts
+++ b/src/@types/global.d.ts
@@ -14,6 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+import "matrix-js-sdk/src/@types/global"; // load matrix-js-sdk's type extensions first
 import * as ModernizrStatic from "modernizr";
 import ContentMessages from "../ContentMessages";
 import { IMatrixClientPeg } from "../MatrixClientPeg";
diff --git a/src/CallHandler.tsx b/src/CallHandler.tsx
index 5b368016b6..4a71934b7f 100644
--- a/src/CallHandler.tsx
+++ b/src/CallHandler.tsx
@@ -77,13 +77,18 @@ import ErrorDialog from "./components/views/dialogs/ErrorDialog";
 import WidgetStore from "./stores/WidgetStore";
 import { WidgetMessagingStore } from "./stores/widgets/WidgetMessagingStore";
 import { ElementWidgetActions } from "./stores/widgets/ElementWidgetActions";
+import { MatrixCall, CallErrorCode, CallState, CallType } from "matrix-js-sdk/lib/webrtc/call";
 
-// until we ts-ify the js-sdk voip code
-type Call = any;
+enum AudioId {
+    Ring = 'ringAudio',
+    Ringback = 'ringbackAudio',
+    CallEnd = 'callendAudio',
+    Busy = 'busyAudio',
+}
 
 export default class CallHandler {
-    private calls = new Map<string, Call>();
-    private audioPromises = new Map<string, Promise<void>>();
+    private calls = new Map<string, MatrixCall>();
+    private audioPromises = new Map<AudioId, Promise<void>>();
 
     static sharedInstance() {
         if (!window.mxCallHandler) {
@@ -108,7 +113,7 @@ export default class CallHandler {
         }
     }
 
-    getCallForRoom(roomId: string): Call {
+    getCallForRoom(roomId: string): MatrixCall {
         return this.calls.get(roomId) || null;
     }
 
@@ -121,7 +126,7 @@ export default class CallHandler {
         return null;
     }
 
-    play(audioId: string) {
+    play(audioId: AudioId) {
         // TODO: Attach an invisible element for this instead
         // which listens?
         const audio = document.getElementById(audioId) as HTMLMediaElement;
@@ -150,7 +155,7 @@ export default class CallHandler {
         }
     }
 
-    pause(audioId: string) {
+    pause(audioId: AudioId) {
         // TODO: Attach an invisible element for this instead
         // which listens?
         const audio = document.getElementById(audioId) as HTMLMediaElement;
@@ -164,7 +169,7 @@ export default class CallHandler {
         }
     }
 
-    private setCallListeners(call: Call) {
+    private setCallListeners(call: MatrixCall) {
         call.on("error", (err) => {
             console.error("Call error:", err);
             if (
@@ -185,69 +190,57 @@ export default class CallHandler {
         });
         // map web rtc states to dummy UI state
         // ringing|ringback|connected|ended|busy|stop_ringback|stop_ringing
-        call.on("state", (newState, oldState) => {
-            if (newState === "ringing") {
-                this.setCallState(call, call.roomId, "ringing");
-                this.pause("ringbackAudio");
-            } else if (newState === "invite_sent") {
-                this.setCallState(call, call.roomId, "ringback");
-                this.play("ringbackAudio");
-            } else if (newState === "ended" && oldState === "connected") {
-                this.removeCallForRoom(call.roomId);
-                this.pause("ringbackAudio");
-                this.play("callendAudio");
-            } else if (newState === "ended" && oldState === "invite_sent" &&
-                    (call.hangupParty === "remote" ||
-                    (call.hangupParty === "local" && call.hangupReason === "invite_timeout")
+        call.on("state", (newState: CallState, oldState: CallState) => {
+            this.setCallState(call, newState);
+
+            switch (oldState) {
+                case CallState.Ringing:
+                    this.pause(AudioId.Ring);
+                    break;
+                case CallState.InviteSent:
+                    this.pause(AudioId.Ringback);
+                    break;
+            }
+
+            switch (newState) {
+                case CallState.Ringing:
+                    this.play(AudioId.Ring);
+                    break;
+                case CallState.InviteSent:
+                    this.play(AudioId.Ringback);
+                    break;
+                case CallState.Ended:
+                    this.removeCallForRoom(call.roomId);
+                    if (oldState === CallState.InviteSent && (
+                        call.hangupParty === "remote" ||
+                        (call.hangupParty === "local" && call.hangupReason === "invite_timeout")
                     )) {
-                this.setCallState(call, call.roomId, "busy");
-                this.pause("ringbackAudio");
-                this.play("busyAudio");
-                Modal.createTrackedDialog('Call Handler', 'Call Timeout', ErrorDialog, {
-                    title: _t('Call Timeout'),
-                    description: _t('The remote side failed to pick up') + '.',
-                });
-            } else if (oldState === "invite_sent") {
-                this.setCallState(call, call.roomId, "stop_ringback");
-                this.pause("ringbackAudio");
-            } else if (oldState === "ringing") {
-                this.setCallState(call, call.roomId, "stop_ringing");
-                this.pause("ringbackAudio");
-            } else if (newState === "connected") {
-                this.setCallState(call, call.roomId, "connected");
-                this.pause("ringbackAudio");
+                        this.play(AudioId.Busy);
+                        Modal.createTrackedDialog('Call Handler', 'Call Timeout', ErrorDialog, {
+                            title: _t('Call Timeout'),
+                            description: _t('The remote side failed to pick up') + '.',
+                        });
+                    } else {
+                        this.play(AudioId.CallEnd);
+                    }
             }
         });
     }
 
-    private setCallState(call: Call, roomId: string, status: string) {
+    private setCallState(call: MatrixCall, status: CallState) {
         console.log(
-            `Call state in ${roomId} changed to ${status} (${call ? call.call_state : "-"})`,
+            `Call state in ${call.roomId} changed to ${status}`,
         );
-        if (call) {
-            this.calls.set(roomId, call);
-        } else {
-            this.calls.delete(roomId);
-        }
 
-        if (status === "ringing") {
-            this.play("ringAudio");
-        } else if (call && call.call_state === "ringing") {
-            this.pause("ringAudio");
-        }
-
-        if (call) {
-            call.call_state = status;
-        }
         dis.dispatch({
             action: 'call_state',
-            room_id: roomId,
+            room_id: call.roomId,
             state: status,
         });
     }
 
     private removeCallForRoom(roomId: string) {
-        this.setCallState(null, roomId, null);
+        this.calls.delete(roomId);
     }
 
     private showICEFallbackPrompt() {
@@ -279,36 +272,36 @@ export default class CallHandler {
         }, null, true);
     }
 
-    private onAction = (payload: ActionPayload) => {
-        const placeCall = (newCall) => {
-            this.setCallListeners(newCall);
-            if (payload.type === 'voice') {
-                newCall.placeVoiceCall();
-            } else if (payload.type === 'video') {
-                newCall.placeVideoCall(
-                    payload.remote_element,
-                    payload.local_element,
-                );
-            } else if (payload.type === 'screensharing') {
-                const screenCapErrorString = PlatformPeg.get().screenCaptureErrorString();
-                if (screenCapErrorString) {
-                    this.removeCallForRoom(newCall.roomId);
-                    console.log("Can't capture screen: " + screenCapErrorString);
-                    Modal.createTrackedDialog('Call Handler', 'Unable to capture screen', ErrorDialog, {
-                        title: _t('Unable to capture screen'),
-                        description: screenCapErrorString,
-                    });
-                    return;
-                }
-                newCall.placeScreenSharingCall(
-                    payload.remote_element,
-                    payload.local_element,
-                );
-            } else {
-                console.error("Unknown conf call type: %s", payload.type);
-            }
-        }
 
+    private placeCall(roomId: string, type: CallType, localElement: HTMLVideoElement, remoteElement: HTMLVideoElement) {
+        const call = Matrix.createNewMatrixCall(MatrixClientPeg.get(), roomId);
+        this.calls.set(roomId, call);
+        this.setCallListeners(call);
+        if (type === 'voice') {
+            call.placeVoiceCall();
+        } else if (type === 'video') {
+            call.placeVideoCall(
+                remoteElement,
+                localElement,
+            );
+        } else if (type === 'screensharing') {
+            const screenCapErrorString = PlatformPeg.get().screenCaptureErrorString();
+            if (screenCapErrorString) {
+                this.removeCallForRoom(roomId);
+                console.log("Can't capture screen: " + screenCapErrorString);
+                Modal.createTrackedDialog('Call Handler', 'Unable to capture screen', ErrorDialog, {
+                    title: _t('Unable to capture screen'),
+                    description: screenCapErrorString,
+                });
+                return;
+            }
+            call.placeScreenSharingCall(remoteElement, localElement);
+        } else {
+            console.error("Unknown conf call type: %s", type);
+        }
+    }
+
+    private onAction = (payload: ActionPayload) => {
         switch (payload.action) {
             case 'place_call':
                 {
@@ -343,8 +336,8 @@ export default class CallHandler {
                         return;
                     } else if (members.length === 2) {
                         console.info("Place %s call in %s", payload.type, payload.room_id);
-                        const call = Matrix.createNewMatrixCall(MatrixClientPeg.get(), payload.room_id);
-                        placeCall(call);
+
+                        this.placeCall(payload.room_id, payload.type, payload.local_element, payload.remote_element);
                     } else { // > 2
                         dis.dispatch({
                             action: "place_conference_call",
@@ -383,24 +376,23 @@ export default class CallHandler {
                         return;
                     }
 
-                    const call = payload.call;
+                    const call = payload.call as MatrixCall;
+                    this.calls.set(call.roomId, call)
                     this.setCallListeners(call);
-                    this.setCallState(call, call.roomId, "ringing");
                 }
                 break;
             case 'hangup':
                 if (!this.calls.get(payload.room_id)) {
                     return; // no call to hangup
                 }
-                this.calls.get(payload.room_id).hangup();
+                this.calls.get(payload.room_id).hangup(CallErrorCode.UserHangup, false)
                 this.removeCallForRoom(payload.room_id);
                 break;
             case 'answer':
-                if (!this.calls.get(payload.room_id)) {
+                if (!this.calls.has(payload.room_id)) {
                     return; // no call to answer
                 }
                 this.calls.get(payload.room_id).answer();
-                this.setCallState(this.calls.get(payload.room_id), payload.room_id, "connected");
                 dis.dispatch({
                     action: "view_room",
                     room_id: payload.room_id,
diff --git a/src/components/structures/RoomStatusBar.js b/src/components/structures/RoomStatusBar.js
index cdaa0bb7f9..453663a261 100644
--- a/src/components/structures/RoomStatusBar.js
+++ b/src/components/structures/RoomStatusBar.js
@@ -1,7 +1,5 @@
 /*
-Copyright 2015, 2016 OpenMarket Ltd
-Copyright 2017, 2018 New Vector Ltd
-Copyright 2019 The Matrix.org Foundation C.I.C.
+Copyright 2015-2020 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -46,10 +44,12 @@ export default class RoomStatusBar extends React.Component {
         // Used to suggest to the user to invite someone
         sentMessageAndIsAlone: PropTypes.bool,
 
-        // true if there is an active call in this room (means we show
-        // the 'Active Call' text in the status bar if there is nothing
-        // more interesting)
-        hasActiveCall: PropTypes.bool,
+        // The active call in the room, if any (means we show the call bar
+        // along with the status of the call)
+        callState: PropTypes.string,
+
+        // The type of the call in progress, or null if no call is in progress
+        callType: PropTypes.string,
 
         // true if the room is being peeked at. This affects components that shouldn't
         // logically be shown when peeking, such as a prompt to invite people to a room.
@@ -121,6 +121,10 @@ export default class RoomStatusBar extends React.Component {
         });
     };
 
+    _showCallBar() {
+        return this.props.callState !== 'ended' && this.props.callState !== 'ringing';
+    }
+
     _onResendAllClick = () => {
         Resend.resendUnsentEvents(this.props.room);
         dis.fire(Action.FocusComposer);
@@ -153,7 +157,7 @@ export default class RoomStatusBar extends React.Component {
     // indicate other sizes.
     _getSize() {
         if (this._shouldShowConnectionError() ||
-            this.props.hasActiveCall ||
+            this._showCallBar() ||
             this.props.sentMessageAndIsAlone
         ) {
             return STATUS_BAR_EXPANDED;
@@ -165,7 +169,7 @@ export default class RoomStatusBar extends React.Component {
 
     // return suitable content for the image on the left of the status bar.
     _getIndicator() {
-        if (this.props.hasActiveCall) {
+        if (this._showCallBar()) {
             const TintableSvg = sdk.getComponent("elements.TintableSvg");
             return (
                 <TintableSvg src={require("../../../res/img/element-icons/room/in-call.svg")} width="23" height="20" />
@@ -269,6 +273,25 @@ export default class RoomStatusBar extends React.Component {
         </div>;
     }
 
+    _getCallStatusText() {
+        switch (this.props.callState) {
+            case 'create_offer':
+            case 'invite_sent':
+                return _t('Calling...');
+            case 'connecting':
+            case 'create_answer':
+                return _t('Call connecting...');
+            case 'connected':
+                return _t('Active call');
+            case 'wait_local_media':
+                if (this.props.callType === 'video') {
+                    return _t('Starting camera...');
+                } else {
+                    return _t('Starting microphone...');
+                }
+        }
+    }
+
     // return suitable content for the main (text) part of the status bar.
     _getContent() {
         if (this._shouldShowConnectionError()) {
@@ -291,10 +314,10 @@ export default class RoomStatusBar extends React.Component {
             return this._getUnsentMessageContent();
         }
 
-        if (this.props.hasActiveCall) {
+        if (this._showCallBar()) {
             return (
                 <div className="mx_RoomStatusBar_callBar">
-                    <b>{ _t('Active call') }</b>
+                    <b>{ this._getCallStatusText() }</b>
                 </div>
             );
         }
diff --git a/src/components/structures/RoomView.tsx b/src/components/structures/RoomView.tsx
index fcb2d274c1..2a6d0b5de8 100644
--- a/src/components/structures/RoomView.tsx
+++ b/src/components/structures/RoomView.tsx
@@ -71,6 +71,7 @@ import RoomHeader from "../views/rooms/RoomHeader";
 import TintableSvg from "../views/elements/TintableSvg";
 import {XOR} from "../../@types/common";
 import { IThreepidInvite } from "../../stores/ThreepidInviteStore";
+import { CallState, MatrixCall } from "matrix-js-sdk/lib/webrtc/call";
 
 const DEBUG = false;
 let debuglog = function(msg: string) {};
@@ -141,7 +142,7 @@ export interface IState {
     }>;
     searchHighlights?: string[];
     searchInProgress?: boolean;
-    callState?: string;
+    callState?: CallState;
     guestsCanJoin: boolean;
     canPeek: boolean;
     showApps: boolean;
@@ -479,7 +480,7 @@ export default class RoomView extends React.Component<IProps, IState> {
 
     componentDidMount() {
         const call = this.getCallForRoom();
-        const callState = call ? call.call_state : "ended";
+        const callState = call ? call.state : null;
         this.setState({
             callState: callState,
         });
@@ -712,14 +713,9 @@ export default class RoomView extends React.Component<IProps, IState> {
                 }
 
                 const call = this.getCallForRoom();
-                let callState = "ended";
-
-                if (call) {
-                    callState = call.call_state;
-                }
 
                 this.setState({
-                    callState: callState,
+                    callState: call ? call.state : null,
                 });
                 break;
             }
@@ -1605,7 +1601,7 @@ export default class RoomView extends React.Component<IProps, IState> {
     /**
      * get any current call for this room
      */
-    private getCallForRoom() {
+    private getCallForRoom(): MatrixCall {
         if (!this.state.room) {
             return null;
         }
@@ -1742,10 +1738,12 @@ export default class RoomView extends React.Component<IProps, IState> {
         // We have successfully loaded this room, and are not previewing.
         // Display the "normal" room view.
 
-        const call = this.getCallForRoom();
-        let inCall = false;
-        if (call && (this.state.callState !== 'ended' && this.state.callState !== 'ringing')) {
-            inCall = true;
+        let activeCall = null;
+        {
+            const call = this.getCallForRoom();
+            if (call && (this.state.callState !== 'ended' && this.state.callState !== 'ringing')) {
+                activeCall = call;
+            }
         }
 
         const scrollheaderClasses = classNames({
@@ -1764,7 +1762,8 @@ export default class RoomView extends React.Component<IProps, IState> {
             statusBar = <RoomStatusBar
                 room={this.state.room}
                 sentMessageAndIsAlone={this.state.isAlone}
-                hasActiveCall={inCall}
+                callState={this.state.callState}
+                callType={activeCall ? activeCall.type : null}
                 isPeeking={myMembership !== "join"}
                 onInviteClick={this.onInviteButtonClick}
                 onStopWarningClick={this.onStopAloneWarningClick}
@@ -1890,10 +1889,10 @@ export default class RoomView extends React.Component<IProps, IState> {
             };
         }
 
-        if (inCall) {
+        if (activeCall) {
             let zoomButton; let videoMuteButton;
 
-            if (call.type === "video") {
+            if (activeCall.type === "video") {
                 zoomButton = (
                     <div className="mx_RoomView_voipButton" onClick={this.onFullscreenClick} title={_t("Fill screen")}>
                         <TintableSvg
@@ -1908,10 +1907,11 @@ export default class RoomView extends React.Component<IProps, IState> {
                 videoMuteButton =
                     <div className="mx_RoomView_voipButton" onClick={this.onMuteVideoClick}>
                         <TintableSvg
-                            src={call.isLocalVideoMuted() ?
+                            src={activeCall.isLocalVideoMuted() ?
                                 require("../../../res/img/element-icons/call/video-muted.svg") :
                                 require("../../../res/img/element-icons/call/video-call.svg")}
-                            alt={call.isLocalVideoMuted() ? _t("Click to unmute video") : _t("Click to mute video")}
+                            alt={activeCall.isLocalVideoMuted() ? _t("Click to unmute video") :
+                                _t("Click to mute video")}
                             width=""
                             height="27"
                         />
@@ -1920,10 +1920,10 @@ export default class RoomView extends React.Component<IProps, IState> {
             const voiceMuteButton =
                 <div className="mx_RoomView_voipButton" onClick={this.onMuteAudioClick}>
                     <TintableSvg
-                        src={call.isMicrophoneMuted() ?
+                        src={activeCall.isMicrophoneMuted() ?
                             require("../../../res/img/element-icons/call/voice-muted.svg") :
                             require("../../../res/img/element-icons/call/voice-unmuted.svg")}
-                        alt={call.isMicrophoneMuted() ? _t("Click to unmute audio") : _t("Click to mute audio")}
+                        alt={activeCall.isMicrophoneMuted() ? _t("Click to unmute audio") : _t("Click to mute audio")}
                         width="21"
                         height="26"
                     />
@@ -2041,7 +2041,7 @@ export default class RoomView extends React.Component<IProps, IState> {
         });
 
         const mainClasses = classNames("mx_RoomView", {
-            mx_RoomView_inCall: inCall,
+            mx_RoomView_inCall: Boolean(activeCall),
         });
 
         return (
diff --git a/src/components/views/voip/CallPreview.tsx b/src/components/views/voip/CallPreview.tsx
index 9acbece8b3..ca2b510f20 100644
--- a/src/components/views/voip/CallPreview.tsx
+++ b/src/components/views/voip/CallPreview.tsx
@@ -24,13 +24,14 @@ import dis from '../../../dispatcher/dispatcher';
 import { ActionPayload } from '../../../dispatcher/payloads';
 import PersistentApp from "../elements/PersistentApp";
 import SettingsStore from "../../../settings/SettingsStore";
+import { CallState, MatrixCall } from 'matrix-js-sdk/lib/webrtc/call';
 
 interface IProps {
 }
 
 interface IState {
     roomId: string;
-    activeCall: any;
+    activeCall: MatrixCall;
 }
 
 export default class CallPreview extends React.Component<IProps, IState> {
@@ -84,7 +85,7 @@ export default class CallPreview extends React.Component<IProps, IState> {
         if (call) {
             dis.dispatch({
                 action: 'view_room',
-                room_id: call.groupRoomId || call.roomId,
+                room_id: call.roomId,
             });
         }
     };
@@ -93,7 +94,7 @@ export default class CallPreview extends React.Component<IProps, IState> {
         const callForRoom = CallHandler.sharedInstance().getCallForRoom(this.state.roomId);
         const showCall = (
             this.state.activeCall &&
-            this.state.activeCall.call_state === 'connected' &&
+            this.state.activeCall.state === CallState.Connected &&
             !callForRoom
         );
 
diff --git a/src/components/views/voip/CallView.tsx b/src/components/views/voip/CallView.tsx
index 2ab291ae86..3e1833a903 100644
--- a/src/components/views/voip/CallView.tsx
+++ b/src/components/views/voip/CallView.tsx
@@ -25,6 +25,7 @@ import AccessibleButton from '../elements/AccessibleButton';
 import VideoView from "./VideoView";
 import RoomAvatar from "../avatars/RoomAvatar";
 import PulsedAvatar from '../avatars/PulsedAvatar';
+import { CallState, MatrixCall } from 'matrix-js-sdk/lib/webrtc/call';
 
 interface IProps {
         // js-sdk room object. If set, we will only show calls for the given
@@ -87,7 +88,7 @@ export default class CallView extends React.Component<IProps, IState> {
     };
 
     private showCall() {
-        let call;
+        let call: MatrixCall;
 
         if (this.props.room) {
             const roomId = this.props.room.roomId;
@@ -120,7 +121,7 @@ export default class CallView extends React.Component<IProps, IState> {
                 call.setRemoteAudioElement(this.getVideoView().getRemoteAudioElement());
             }
         }
-        if (call && call.type === "video" && call.call_state !== "ended" && call.call_state !== "ringing") {
+        if (call && call.type === "video" && call.state !== CallState.Ended && call.state !== CallState.Ringing) {
             this.getVideoView().getLocalVideoElement().style.display = "block";
             this.getVideoView().getRemoteVideoElement().style.display = "block";
         } else {
diff --git a/src/components/views/voip/IncomingCallBox.tsx b/src/components/views/voip/IncomingCallBox.tsx
index 8e5d0f9e4a..560a034f47 100644
--- a/src/components/views/voip/IncomingCallBox.tsx
+++ b/src/components/views/voip/IncomingCallBox.tsx
@@ -25,6 +25,7 @@ import CallHandler from '../../../CallHandler';
 import PulsedAvatar from '../avatars/PulsedAvatar';
 import RoomAvatar from '../avatars/RoomAvatar';
 import FormButton from '../elements/FormButton';
+import { CallState } from 'matrix-js-sdk/lib/webrtc/call';
 
 interface IProps {
 }
@@ -53,7 +54,7 @@ export default class IncomingCallBox extends React.Component<IProps, IState> {
         switch (payload.action) {
             case 'call_state': {
                 const call = CallHandler.sharedInstance().getCallForRoom(payload.room_id);
-                if (call && call.call_state === 'ringing') {
+                if (call && call.state === CallState.Ringing) {
                     this.setState({
                         incomingCall: call,
                     });
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index d3b942e6fa..eb8f9100ec 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -2095,6 +2095,10 @@
     "%(count)s of your messages have not been sent.|one": "Your message was not sent.",
     "%(count)s <resendText>Resend all</resendText> or <cancelText>cancel all</cancelText> now. You can also select individual messages to resend or cancel.|other": "<resendText>Resend all</resendText> or <cancelText>cancel all</cancelText> now. You can also select individual messages to resend or cancel.",
     "%(count)s <resendText>Resend all</resendText> or <cancelText>cancel all</cancelText> now. You can also select individual messages to resend or cancel.|one": "<resendText>Resend message</resendText> or <cancelText>cancel message</cancelText> now.",
+    "Calling...": "Calling...",
+    "Call connecting...": "Call connecting...",
+    "Starting camera...": "Starting camera...",
+    "Starting microphone...": "Starting microphone...",
     "Connectivity to the server has been lost.": "Connectivity to the server has been lost.",
     "Sent messages will be stored until your connection has returned.": "Sent messages will be stored until your connection has returned.",
     "There's no one else here! Would you like to <inviteText>invite others</inviteText> or <nowarnText>stop warning about the empty room</nowarnText>?": "There's no one else here! Would you like to <inviteText>invite others</inviteText> or <nowarnText>stop warning about the empty room</nowarnText>?",