diff --git a/src/audio/audiortp.h b/src/audio/audiortp.h
index f249201862c6e4908efe4ce1f1943b5cefdd0cec..8410fe9b35770871a94c7bd7ff179ea025dbe600 100644
--- a/src/audio/audiortp.h
+++ b/src/audio/audiortp.h
@@ -67,7 +67,7 @@ private:
   /** Buffer for 48000hz samples in conversion */ 
   float32* _floatBuffer48000;
 
-  /** Buffer for 8000hz samples for mic conversion */
+  /** Buffer for 8000Hz samples for mic conversion */
   int16* _intBuffer8000;
 
   void initAudioRtpSession(void);
@@ -87,9 +87,9 @@ public:
   void			closeRtpSession	 ();
 
 private:
-  AudioRtpRTX*	_RTXThread;
+  AudioRtpRTX*	        _RTXThread;
   bool			_symmetric;
-  ost::Mutex _threadMutex;
+  ost::Mutex            _threadMutex;
 };
 
 #endif // __AUDIO_RTP_H__
diff --git a/src/audio/ringbuffer.cpp b/src/audio/ringbuffer.cpp
index 0a80473b69bb1dc3482e9678dda5584dcdb89347..1a344ab26614e84ce05b50489a4a9e99f0edce6b 100644
--- a/src/audio/ringbuffer.cpp
+++ b/src/audio/ringbuffer.cpp
@@ -64,6 +64,7 @@ RingBuffer::debug() {
 //
 int 
 RingBuffer::AvailForPut() const {
+   // Always keep 4 bytes safe (?)
    return (mBufferSize-4) - Len();
 } 
 
@@ -84,19 +85,23 @@ RingBuffer::Put(void* buffer, int toCopy, unsigned short volume) {
 
    copied = 0;
    pos = mEnd;
-   //fprintf(stderr, "P");
+
    while(toCopy) {
       block = toCopy;
-      if (block > (mBufferSize - pos)) { // from current pos. to end of buffer
+
+      // Wrap block around ring ?
+      if (block > (mBufferSize - pos)) {
+         // Fill in to the end of the buffer
          block = mBufferSize - pos;
       }
 
-      // put the data inside the buffer.
-      if (volume!=100) {
-        SFLDataFormat* start = (SFLDataFormat*)src;
+      // Gain adjustment (when Mic vol. is changed)
+      if (volume != 100) {
+        SFLDataFormat* start = (SFLDataFormat*) src;
         int nbSample = block / sizeof(SFLDataFormat);
         for (int i=0; i<nbSample; i++) { start[i] = start[i] * volume / 100; }
       }
+
       // bcopy(src, dest, len)
       //fprintf(stderr, "has %d put %d\t", len, block);
       bcopy (src, mBuffer + pos, block);
diff --git a/src/global.h b/src/global.h
index 33ccacc939e8037925e4cc19b9e2e9340a2f3cdd..ea441eb8c18657a1634cce5ecdd603d2fbf5cb9b 100644
--- a/src/global.h
+++ b/src/global.h
@@ -44,7 +44,7 @@ typedef short int16;
 
 #ifdef SFLDEBUG
   #define _debug(...)          fprintf(stderr, "[sfl-debug] " __VA_ARGS__)
-  #define _debugStart(...)         fprintf(stderr, "[sfl-debug] " __VA_ARGS__)
+  #define _debugStart(...)     fprintf(stderr, "[sfl-debug] " __VA_ARGS__)
   #define _debugMid(...)       fprintf(stderr, __VA_ARGS__)
   #define _debugEnd(...)       fprintf(stderr, __VA_ARGS__)
   #define _debugException(...) fprintf(stderr, "[sfl-excep] " __VA_ARGS__ "\n")
diff --git a/src/sipvoiplink.cpp b/src/sipvoiplink.cpp
index 81ec22db8d93f2feccd2c5e583070342527bb59e..d6d9106935edc39842af6e3aa031974168889e60 100644
--- a/src/sipvoiplink.cpp
+++ b/src/sipvoiplink.cpp
@@ -339,7 +339,7 @@ SIPVoIPLink::getEvent()
      case EXOSIP_SUBSCRIPTION_GLOBALFAILURE:   /** 43 < announce a global failure       */
      case EXOSIP_SUBSCRIPTION_NOTIFY:          /** 44 < announce new NOTIFY request     */
      case EXOSIP_SUBSCRIPTION_RELEASED:        /** 45 < call context is cleared.        */
-       Manager::instance().displayError(" !EXOSIP Subscription resposne not implemented yet");
+       Manager::instance().displayError(" !EXOSIP Subscription response not implemented yet.");
        break;
       
      case EXOSIP_IN_SUBSCRIPTION_NEW:          /** 46 < announce new incoming SUBSCRIBE.*/
@@ -521,7 +521,7 @@ SIPVoIPLink::answer(const CallID& id)
   eXosip_lock();
   int i = eXosip_call_build_answer(call->getTid(), SIP_OK, &answerMessage);
   if (i != 0) {
-   _debug("< SIP Building Error: send 400 Bad Request\n");
+    _debug("< SIP Building Error: send 400 Bad Request\n");
     eXosip_call_send_answer (call->getTid(), SIP_BAD_REQUEST, NULL);
   } else {
     // use exosip, bug locked
diff --git a/src/sipvoiplink.h b/src/sipvoiplink.h
index 65ebc4010d1010c51f0d7331eb1cd3471db0dbb3..3d8a3a7aab2f2cdf80f9123cdef3c17b19c5fb00 100644
--- a/src/sipvoiplink.h
+++ b/src/sipvoiplink.h
@@ -29,15 +29,16 @@ class EventThread;
 class SIPCall;
 
 /**
- * Specific VoIPLink for SIP (SIP core for incoming and outcoming events)
+ * Specific VoIPLink for SIP (SIP core for incoming and outgoing events)
  * @author Yan Morin <yan.morin@gmail.com>
  */
+
 class SIPVoIPLink : public VoIPLink
 {
 public:
-    SIPVoIPLink(const AccountID& accountID);
+  SIPVoIPLink(const AccountID& accountID);
 
-    ~SIPVoIPLink();
+  ~SIPVoIPLink();
 
   /** try to initiate the eXosip engine/thread and set config */
   bool init(void);
@@ -63,11 +64,20 @@ public:
 
 
   // SIP Specific
+
   /** If set to true, we check for a firewall
    * @param use true if we use STUN
    */
   void setUseStun(bool use) { _useStun = use; }
+
+  /** The name of the STUN server
+   * @param server Server FQDN/IP
+   */
   void setStunServer(const std::string& server) { _stunServer = server; }
+
+  /** Set the SIP proxy
+   * @param proxy Proxy FQDN/IP
+   */
   void setProxy(const std::string& proxy) { _proxy = proxy; }
   void setUserPart(const std::string& userpart) { _userpart = userpart; }
   void setAuthName(const std::string& authname) { _authname = authname; }
@@ -234,8 +244,10 @@ private:
   EventThread* _evThread;
   /** Tell if eXosip was stared (eXosip_init) */
   bool _eXosipStarted;
+
   /** Registration identifier, needed by unregister to build message */
   int _eXosipRegID;
+
   /** Number of voicemail */
   int _nMsgVoicemail;
 
@@ -244,17 +256,19 @@ private:
 
   /** Do we use stun? */
   bool _useStun;
+
   /** What is the stun server? */
   std::string _stunServer;
 
-  /** Local Extern Address is the IP address seens by peers for SIP listener */
+  /** Local Extern Address is the IP address seen by peers for SIP listener */
   std::string _localExternAddress;
 
-  /** Local Extern Port is the port seens by peers for SIP listener */
+  /** Local Extern Port is the port seen by peers for SIP listener */
   unsigned int _localExternPort;  
 
   /** SIP Proxy URL */
   std::string _proxy;
+
   /** SIP UserPart */
   std::string _userpart;