diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5de41e4..b1daef4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,12 +9,9 @@ find_package(PkgConfig REQUIRED)
 
 pkg_check_modules(PJSIP "libpjproject")
 pkg_check_modules(LOG4CPP "log4cpp")
-pkg_check_modules(SNDFILE "sndfile")
-
 
 include_directories(${PJSIP_INCLUDE_DIRS})
 include_directories(${LOG4CPP_INCLUDE_DIRS})
-include_directories(${SNDFILE_INCLUDE_DIRS})
 include_directories(../mumlib/include)
 
 link_directories(../mumlib/build)
@@ -24,7 +21,7 @@ set(SOURCE_FILES
         PjsuaCommunicator.hpp
         MumbleCommunicator.cpp
         MumbleCommunicator.hpp
-        ISamplesBuffer.hpp
+        ICommunicator.hpp
         Configuration.cpp
         Configuration.hpp)
 
@@ -33,10 +30,8 @@ set(SOURCE_FILES
 #)
 
 add_executable(mumsi ${SOURCE_FILES} main.cpp)
-target_link_libraries(mumsi ${OPUS_LIBRARIES})
 target_link_libraries(mumsi ${PJSIP_LIBRARIES})
 target_link_libraries(mumsi ${LOG4CPP_LIBRARIES})
-target_link_libraries(mumsi ${SNDFILE_LIBRARIES})
 target_link_libraries(mumsi ${Boost_LIBRARIES})
 target_link_libraries(mumsi mumlib)
 
diff --git a/Configuration.hpp b/Configuration.hpp
index 2c5ec1c..b08a526 100644
--- a/Configuration.hpp
+++ b/Configuration.hpp
@@ -1,5 +1,4 @@
-#ifndef CONFIGURATION_HPP_
-#define CONFIGURATION_HPP_
+#pragma once
 
 #include <string>
 #include <stdexcept>
@@ -35,5 +34,3 @@ namespace config {
         ConfigurationImpl *impl;
     };
 }
-
-#endif /* CONFIGURATION_HPP_ */
diff --git a/ICommunicator.hpp b/ICommunicator.hpp
new file mode 100644
index 0000000..f8ca9e0
--- /dev/null
+++ b/ICommunicator.hpp
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <functional>
+#include <inttypes.h>
+
+class ICommunicator {
+public:
+    /**
+     * Send samples through the Communicator.
+     */
+    virtual void sendPcmSamples(int16_t *samples, unsigned int length) = 0;
+
+    /**
+     * This callback is called when Communicator has received samples.
+     */
+    std::function<void(int16_t *, int)> onIncomingPcmSamples;
+};
diff --git a/ISamplesBuffer.hpp b/ISamplesBuffer.hpp
deleted file mode 100644
index b5f4750..0000000
--- a/ISamplesBuffer.hpp
+++ /dev/null
@@ -1,14 +0,0 @@
-#ifndef MUMSI_ISAMPLESBUFFER_HPP
-#define MUMSI_ISAMPLESBUFFER_HPP
-
-#include <inttypes.h>
-
-class ISamplesBuffer {
-public:
-    virtual void pushSamples(int16_t *samples, unsigned int length) = 0;
-
-//    virtual unsigned int pullSamples(int16_t *samples, unsigned int length, bool waitWhenEmpty) = 0;
-};
-
-
-#endif //MUMSI_ISAMPLESBUFFER_HPP
diff --git a/MumbleCommunicator.cpp b/MumbleCommunicator.cpp
index f4a93f8..9f19537 100644
--- a/MumbleCommunicator.cpp
+++ b/MumbleCommunicator.cpp
@@ -12,22 +12,21 @@ namespace mumble {
         virtual void audio(
                 int16_t *pcm_data,
                 uint32_t pcm_data_size) {
-            communicator->samplesBuffer.pushSamples(pcm_data, pcm_data_size);
+            communicator->onIncomingPcmSamples(pcm_data, pcm_data_size);
         }
     };
 }
 
-mumble::MumbleCommunicator::MumbleCommunicator(
-        boost::asio::io_service &ioService,
-        ISamplesBuffer &samplesBuffer,
+mumble::MumbleCommunicator::MumbleCommunicator(boost::asio::io_service &ioService)
+        : ioService(ioService),
+          logger(log4cpp::Category::getInstance("MumbleCommunicator")) {
+}
+
+void mumble::MumbleCommunicator::connect(
         std::string user,
         std::string password,
         std::string host,
-        int port) : ioService(ioService),
-                    samplesBuffer(samplesBuffer),
-                    logger(log4cpp::Category::getInstance("MumbleCommunicator")) {
-
-    quit = false;
+        int port) {
 
     callback.reset(new MumlibCallback());
 
@@ -38,7 +37,7 @@ mumble::MumbleCommunicator::MumbleCommunicator(
     mum->connect(host, port, user, password);
 }
 
-void mumble::MumbleCommunicator::sendAudioFrame(int16_t *samples, int length) {
+void mumble::MumbleCommunicator::sendPcmSamples(int16_t *samples, unsigned int length) {
     mum->sendAudioData(samples, length);
 }
 
diff --git a/MumbleCommunicator.hpp b/MumbleCommunicator.hpp
index 4f39143..259c0f3 100644
--- a/MumbleCommunicator.hpp
+++ b/MumbleCommunicator.hpp
@@ -1,14 +1,12 @@
-#ifndef MUMSI_MUMBLECOMMUNICATOR_HPP
-#define MUMSI_MUMBLECOMMUNICATOR_HPP
+#pragma once
+
+#include "ICommunicator.hpp"
 
-#include "ISamplesBuffer.hpp"
 #include <mumlib.hpp>
 
 #include <string>
 #include <stdexcept>
 #include <log4cpp/Category.hh>
-#include <sndfile.hh>
-#include <thread>
 
 namespace mumble {
 
@@ -19,11 +17,12 @@ namespace mumble {
 
     class MumlibCallback;
 
-    class MumbleCommunicator {
+    class MumbleCommunicator : public ICommunicator {
     public:
         MumbleCommunicator(
-                boost::asio::io_service &ioService,
-                ISamplesBuffer &samplesBuffer,
+                boost::asio::io_service &ioService);
+
+        void connect(
                 std::string user,
                 std::string password,
                 std::string host,
@@ -31,31 +30,17 @@ namespace mumble {
 
         ~MumbleCommunicator();
 
-//        void senderThreadFunction();
-
-        //void receiveAudioFrameCallback(uint8_t *audio_data, uint32_t audio_data_size);
-
-        void sendAudioFrame(int16_t *samples, int length);
+        virtual void sendPcmSamples(int16_t *samples, unsigned int length);
 
     public:
         boost::asio::io_service &ioService;
 
         log4cpp::Category &logger;
 
-        ISamplesBuffer &samplesBuffer;
-
         std::shared_ptr<mumlib::Mumlib> mum;
 
-        std::unique_ptr<std::thread> senderThread;
-
-        SndfileHandle fileHandle;
-
         std::unique_ptr<MumlibCallback> callback;
 
-        bool quit;
-
         friend class MumlibCallback;
     };
 }
-
-#endif //MUMSI_MUMBLECOMMUNICATOR_HPP
diff --git a/PjsuaCommunicator.cpp b/PjsuaCommunicator.cpp
index 7b81c7b..f61c936 100644
--- a/PjsuaCommunicator.cpp
+++ b/PjsuaCommunicator.cpp
@@ -3,22 +3,17 @@
 
 #include <pjlib.h>
 #include <pjsua-lib/pjsua.h>
-
-#include <functional>
-
-#include <cstring>
-
-//todo wywalić
-#define THIS_FILE "mumsi"
+#include <boost/algorithm/string/replace.hpp>
 
 using namespace std;
 
-
 /**
  * This is global, because there's no way to pass it's value to onCallMediaState callback.
  */
 static int mediaPortSlot;
 
+static log4cpp::Category &pjLogger = log4cpp::Category::getInstance("PjSip");
+
 
 static void onCallMediaState(pjsua_call_id call_id) {
     pjsua_call_info ci;
@@ -41,9 +36,7 @@ static void onIncomingCall(pjsua_acc_id acc_id,
 
     pjsua_call_get_info(call_id, &ci);
 
-    PJ_LOG(3, (THIS_FILE, "Incoming call from %.*s!!",
-            (int) ci.remote_info.slen,
-            ci.remote_info.ptr));
+    pjLogger.notice("Incoming call from %s.", ci.remote_info.ptr);
 
     /* Automatically answer incoming calls with 200/OK */
     pjsua_call_answer(call_id, 200, NULL, NULL);
@@ -56,23 +49,30 @@ static void onCallState(pjsua_call_id call_id,
     PJ_UNUSED_ARG(e);
 
     pjsua_call_get_info(call_id, &ci);
-    PJ_LOG(3, (THIS_FILE, "Call %d state=%.*s", call_id,
-            (int) ci.state_text.slen,
-            ci.state_text.ptr));
+    pjLogger.notice("Call %d state=%s.", call_id, ci.state_text.ptr);
+}
+
+static void pjLogToLog4CppBridgeFunction(int level, const char *data, int len) {
+    using namespace log4cpp;
+    std::map<int, Priority::Value> prioritiesMap = {
+            {1, Priority::ERROR},
+            {2, Priority::WARN},
+            {3, Priority::NOTICE},
+            {4, Priority::INFO},
+            {5, Priority::DEBUG},
+            {6, Priority::DEBUG}
+    };
+
+    string message(data);
+
+    message = message.substr(0, message.size() - 1); // remove newline
+
+    pjLogger << prioritiesMap.at(level) << message;
 }
 
 sip::PjsuaCommunicator::PjsuaCommunicator()
         : logger(log4cpp::Category::getInstance("SipCommunicator")),
           callbackLogger(log4cpp::Category::getInstance("SipCommunicatorCallback")) {
-
-}
-
-void sip::PjsuaCommunicator::connect(
-        std::string host,
-        std::string user,
-        std::string password,
-        unsigned int port) {
-
     pj_status_t status;
 
     status = pjsua_create();
@@ -80,6 +80,8 @@ void sip::PjsuaCommunicator::connect(
         throw sip::Exception("Error in pjsua_create()", status);
     }
 
+    pj_log_set_log_func(pjLogToLog4CppBridgeFunction);
+
     pjsua_config generalConfig;
     pjsua_config_default(&generalConfig);
 
@@ -90,11 +92,10 @@ void sip::PjsuaCommunicator::connect(
     generalConfig.cb.on_call_media_state = &onCallMediaState;
     generalConfig.cb.on_call_state = &onCallState;
 
-    //todo zrobić coś z logami
     pjsua_logging_config logConfig;
     pjsua_logging_config_default(&logConfig);
-
-    logConfig.console_level = 4;
+    logConfig.cb = pjLogToLog4CppBridgeFunction;
+    logConfig.console_level = 5;
 
     status = pjsua_init(&generalConfig, &logConfig, NULL);
     if (status != PJ_SUCCESS) {
@@ -103,7 +104,25 @@ void sip::PjsuaCommunicator::connect(
 
     pjsua_set_null_snd_dev();
 
-    /* Add UDP transport. */
+    pj_caching_pool cachingPool;
+    pj_caching_pool_init(&cachingPool, &pj_pool_factory_default_policy, 0);
+    pj_pool_t *pool = pj_pool_create(&cachingPool.factory, "wav", 32768, 8192, nullptr);
+
+    // todo calculate sizes
+    pjmedia_circ_buf_create(pool, 960 * 10, &inputBuff);
+
+    mediaPort = createMediaPort();
+
+    pjsua_conf_add_port(pool, mediaPort, &mediaPortSlot);
+}
+
+void sip::PjsuaCommunicator::connect(
+        std::string host,
+        std::string user,
+        std::string password,
+        unsigned int port) {
+    pj_status_t status;
+
     pjsua_transport_config transportConfig;
     pjsua_transport_config_default(&transportConfig);
 
@@ -114,18 +133,6 @@ void sip::PjsuaCommunicator::connect(
         throw sip::Exception("Error creating transport", status);
     }
 
-    pj_caching_pool cachingPool;
-    pj_caching_pool_init(&cachingPool, &pj_pool_factory_default_policy, 0);
-    pj_pool_t *pool = pj_pool_create(&cachingPool.factory, "wav", 32768, 8192, nullptr);
-
-    // create circular buffers
-    pjmedia_circ_buf_create(pool, 960 * 10, &inputBuff);
-    pjmedia_circ_buf_create(pool, 960 * 10, &outputBuff);
-
-    mediaPort = createMediaPort();
-
-    pjsua_conf_add_port(pool, mediaPort, &mediaPortSlot);
-
     /* Initialization is done, now start sip */
     status = pjsua_start();
     if (status != PJ_SUCCESS) {
@@ -210,16 +217,9 @@ pj_status_t sip::PjsuaCommunicator::mediaPortGetFrame(pjmedia_frame *frame) {
 }
 
 void sip::PjsuaCommunicator::mediaPortPutFrame(pj_int16_t *samples, pj_size_t count) {
-//    std::unique_lock<std::mutex> lock(outBuffAccessMutex);
-//
-//    callbackLogger.debug("Pushing %d samples to out-buff.", count);
-//    pjmedia_circ_buf_write(outputBuff, samples, count);
-//
-//    lock.unlock();
-//
-//    outBuffCondVar.notify_all();
     if (count > 0) {
-        onIncomingSamples(samples, count);
+        callbackLogger.debug("Calling onIncomingPcmSamples with %d samples.", count);
+        onIncomingPcmSamples(samples, count);
     }
 }
 
@@ -228,7 +228,18 @@ void sip::PjsuaCommunicator::registerAccount(string host, string user, string pa
     pjsua_acc_config accConfig;
     pjsua_acc_config_default(&accConfig);
 
-    accConfig.id = toPjString(string("sip:") + user + "@" + host);
+    string uri = string("sip:") + user + "@" + host;
+
+    pj_status_t status;
+
+    status = pjsua_verify_sip_url(uri.c_str());
+    if (status != PJ_SUCCESS) {
+        throw sip::Exception("failed to register account", status);
+    }
+
+    logger.info("Registering account for URI: %s.", uri.c_str());
+
+    accConfig.id = toPjString(uri);
     accConfig.reg_uri = toPjString(string("sip:") + host);
 
     accConfig.cred_count = 1;
@@ -240,32 +251,14 @@ void sip::PjsuaCommunicator::registerAccount(string host, string user, string pa
 
     pjsua_acc_id acc_id;
 
-    pj_status_t status = pjsua_acc_add(&accConfig, PJ_TRUE, &acc_id);
+    status = pjsua_acc_add(&accConfig, PJ_TRUE, &acc_id);
     if (status != PJ_SUCCESS) {
         throw sip::Exception("failed to register account", status);
     }
 }
 
-void sip::PjsuaCommunicator::pushSamples(int16_t *samples, unsigned int length) {
+void sip::PjsuaCommunicator::sendPcmSamples(int16_t *samples, unsigned int length) {
     std::unique_lock<std::mutex> lock(inBuffAccessMutex);
     callbackLogger.debug("Pushing %d samples to in-buff.", length);
     pjmedia_circ_buf_write(inputBuff, samples, length);
 }
-
-//unsigned int sip::PjsuaCommunicator::pullSamples(int16_t *samples, unsigned int length, bool waitWhenEmpty) {
-//    std::unique_lock<std::mutex> lock(outBuffAccessMutex);
-//
-//    unsigned int availableSamples;
-//
-//    while ((availableSamples = pjmedia_circ_buf_get_len(inputBuff)) < length) {
-//        callbackLogger.debug("Not enough samples in buffer: %d, requested %d. Waiting.", availableSamples, length);
-//        outBuffCondVar.wait(lock);
-//    }
-//
-//    const int samplesToRead = std::min(length, availableSamples);
-//
-//    callbackLogger.debug("Pulling %d samples from out-buff.", samplesToRead);
-//    pjmedia_circ_buf_read(inputBuff, samples, samplesToRead);
-//
-//    return samplesToRead;
-//}
diff --git a/PjsuaCommunicator.hpp b/PjsuaCommunicator.hpp
index 58b0451..a6c85d4 100644
--- a/PjsuaCommunicator.hpp
+++ b/PjsuaCommunicator.hpp
@@ -1,7 +1,6 @@
-#ifndef MUMSI_PJSUACOMMUNICATOR_HPP
-#define MUMSI_PJSUACOMMUNICATOR_HPP
+#pragma once
 
-#include "ISamplesBuffer.hpp"
+#include "ICommunicator.hpp"
 
 #include <pjmedia.h>
 
@@ -44,7 +43,7 @@ namespace sip {
 
     pj_status_t MediaPort_putFrameRawCallback(pjmedia_port *port, pjmedia_frame *frame);
 
-    class PjsuaCommunicator : public ISamplesBuffer {
+    class PjsuaCommunicator : public ICommunicator {
     public:
         PjsuaCommunicator();
 
@@ -56,11 +55,7 @@ namespace sip {
 
         ~PjsuaCommunicator();
 
-        virtual void pushSamples(int16_t *samples, unsigned int length);
-
-        std::function<void(int16_t *, int)> onIncomingSamples;
-
-//        virtual unsigned int pullSamples(int16_t *samples, unsigned int length, bool waitWhenEmpty);
+        virtual void sendPcmSamples(int16_t *samples, unsigned int length);
 
     private:
         log4cpp::Category &logger;
@@ -70,14 +65,9 @@ namespace sip {
         pjmedia_port *mediaPort;
 
         pjmedia_circ_buf *inputBuff;
-        pjmedia_circ_buf *outputBuff;
 
         std::mutex inBuffAccessMutex;
 
-        std::mutex outBuffAccessMutex;
-        std::condition_variable outBuffCondVar;
-
-
         // todo make it completely stateless
         pjmedia_port *createMediaPort();
 
@@ -101,5 +91,3 @@ namespace sip {
     };
 
 }
-
-#endif //MUMSI_PJSUACOMMUNICATOR_HPP
diff --git a/main.cpp b/main.cpp
index 82ee603..904aef4 100644
--- a/main.cpp
+++ b/main.cpp
@@ -26,27 +26,31 @@ int main(int argc, char *argv[]) {
 
     sip::PjsuaCommunicator pjsuaCommunicator;
 
-    mumble::MumbleCommunicator mumbleCommunicator(
-            ioService,
-            pjsuaCommunicator,
+    mumble::MumbleCommunicator mumbleCommunicator(ioService);
+
+    using namespace std::placeholders;
+    pjsuaCommunicator.onIncomingPcmSamples = std::bind(
+            &mumble::MumbleCommunicator::sendPcmSamples,
+            &mumbleCommunicator,
+            _1, _2);
+
+    mumbleCommunicator.onIncomingPcmSamples = std::bind(
+            &sip::PjsuaCommunicator::sendPcmSamples,
+            &pjsuaCommunicator,
+            _1, _2);
+
+    mumbleCommunicator.connect(
             conf.getString("mumble.user"),
             conf.getString("mumble.password"),
             conf.getString("mumble.host"),
             conf.getInt("mumble.port"));
 
-    using namespace std::placeholders;
-    pjsuaCommunicator.onIncomingSamples = std::bind(
-            &mumble::MumbleCommunicator::sendAudioFrame,
-            &mumbleCommunicator,
-            _1, _2);
-
     pjsuaCommunicator.connect(
             conf.getString("sip.host"),
             conf.getString("sip.user"),
             conf.getString("sip.password"),
             conf.getInt("sip.port"));
 
-
     logger.info("Application started.");
 
     ioService.run();