diff --git a/lib/RTCSession.js b/lib/RTCSession.js
index 7a1dfd63..bd9ebc7c 100644
--- a/lib/RTCSession.js
+++ b/lib/RTCSession.js
@@ -663,6 +663,14 @@ module.exports = class RTCSession extends EventEmitter
         // Audio and/or video requested, prompt getUserMedia.
         else if (mediaConstraints.audio || mediaConstraints.video)
         {
+          if ( ! navigator.mediaDevices )
+          {
+            const error = new Error('Media inaccessible; Secure context required (eg. https://, file://)');
+
+            //this._failed('local', null, JsSIP_C.causes.USER_DENIED_MEDIA_ACCESS);
+            //this.emit('getusermediafailed', error);
+            throw error;
+          }
           this._localMediaStreamLocallyGenerated = true;
 
           return navigator.mediaDevices.getUserMedia(mediaConstraints)
@@ -793,12 +801,12 @@ module.exports = class RTCSession extends EventEmitter
       })
       .catch((error) =>
       {
+        logger.warn(`getUserMedia error: ${JSON.stringify(error)}`);
         if (this._status === C.STATUS_TERMINATED)
         {
           return;
         }
-
-        logger.warn(error);
+        throw error;
       });
   }
 
@@ -2630,11 +2638,28 @@ module.exports = class RTCSession extends EventEmitter
         // Request for user media access.
         else if (mediaConstraints.audio || mediaConstraints.video)
         {
+          if ( ! navigator.mediaDevices )
+          {
+            const error = new Error('Media inaccessible; Secure context required (eg. https://, file://)');
+
+            //this._failed('local', null, JsSIP_C.causes.USER_DENIED_MEDIA_ACCESS);
+            //this.emit('getusermediafailed', error);
+            throw error;
+          }
           this._localMediaStreamLocallyGenerated = true;
 
+          logger.warn(`getUserMedia requesting ${JSON.stringify( mediaConstraints )} from ${JSON.stringify( navigator.mediaDevices )}`);
+
           return navigator.mediaDevices.getUserMedia(mediaConstraints)
+            .then((stream) =>
+            {
+              logger.warn(`getUserMedia gives ${JSON.stringify( stream )}`);
+
+              return stream;
+            })
             .catch((error) =>
             {
+              logger.warn(`getUserMedia error ${JSON.stringify( error )}`);
               if (this._status === C.STATUS_TERMINATED)
               {
                 throw new Error('terminated');
@@ -2652,6 +2677,7 @@ module.exports = class RTCSession extends EventEmitter
       })
       .then((stream) =>
       {
+        logger.warn(`getUserMedia returned stream ${JSON.stringify( stream )}`);
         if (this._status === C.STATUS_TERMINATED)
         {
           throw new Error('terminated');
@@ -2699,12 +2725,12 @@ module.exports = class RTCSession extends EventEmitter
       })
       .catch((error) =>
       {
+        logger.warn(`getUserMedia error: ${JSON.stringify(error)}`);
         if (this._status === C.STATUS_TERMINATED)
         {
           return;
         }
-
-        logger.warn(error);
+        throw error;
       });
   }