diff --git a/sflphone-common/src/audio/audiortp/AudioSrtpSession.cpp b/sflphone-common/src/audio/audiortp/AudioSrtpSession.cpp
index 28fe6764fff441d1a95d2a49604890d569f56284..d86251ca1d755958e17c69d04629c02db9a327a1 100644
--- a/sflphone-common/src/audio/audiortp/AudioSrtpSession.cpp
+++ b/sflphone-common/src/audio/audiortp/AudioSrtpSession.cpp
@@ -43,6 +43,7 @@ AudioSrtpSession::AudioSrtpSession (ManagerImpl * manager, SIPCall * sipcall) :
     initializeMasterSalt();
     initializeInputCryptoContext();
     initializeOutputCryptoContext();
+
     outputCryptoCtx->deriveSrtpKeys(0);
 
     setInQueueCryptoContext(inputCryptoCtx);
@@ -71,36 +72,36 @@ void AudioSrtpSession::initializeMasterSalt(void)
 void AudioSrtpSession::initializeInputCryptoContext(void)
 {
 
-    inputCryptoCtx = new ost::CryptoContext(0x12345678,
-					 0,                           // roc,
-					 0L,                          // keydr,
-					 SrtpEncryptionAESCM,         // encryption algo
-					 SrtpAuthenticationSha1Hmac,  // authtication algo
-					 _masterKey,                  // Master Key
-					 128 / 8,                     // Master Key length
-					 _masterSalt,                 // Master Salt
-					 112 / 8,                     // Master Salt length
-					 128 / 8,                     // encryption keyl
-					 160 / 8,                     // authentication key len
-					 112 / 8,                     // session salt len
-					 80 / 8);                     // authentication tag len
+    inputCryptoCtx = new ost::CryptoContext(getLocalSSRCNetwork(),
+					    0,                           // roc,
+					    0L,                          // keydr,
+					    SrtpEncryptionAESCM,         // encryption algo
+					    SrtpAuthenticationSha1Hmac,  // authtication algo
+					    _masterKey,                  // Master Key
+					    128 / 8,                     // Master Key length
+					    _masterSalt,                 // Master Salt
+					    112 / 8,                     // Master Salt length
+					    128 / 8,                     // encryption keyl
+					    160 / 8,                     // authentication key len
+					    112 / 8,                     // session salt len
+					    80 / 8);                     // authentication tag len
 }
 
 void AudioSrtpSession::initializeOutputCryptoContext(void)
 {
 
-    outputCryptoCtx = new ost::CryptoContext(0x12345678,
-					 0,                           // roc,
-					 0L,                          // keydr,
-					 SrtpEncryptionAESCM,         // encryption algo
-					 SrtpAuthenticationSha1Hmac,  // authtication algo
-					 _masterKey,                  // Master Key
-					 128 / 8,                     // Master Key length
-					 _masterSalt,                 // Master Salt
-					 112 / 8,                     // Master Salt length
-					 128 / 8,                     // encryption keyl
-					 160 / 8,                     // authentication key len
-					 112 / 8,                     // session salt len
-					 80 / 8);                     // authentication tag len
+    outputCryptoCtx = new ost::CryptoContext(getLocalSSRCNetwork(),
+					     0,                           // roc,
+					     0L,                          // keydr,
+					     SrtpEncryptionAESCM,         // encryption algo
+					     SrtpAuthenticationSha1Hmac,  // authtication algo
+					     _masterKey,                  // Master Key
+					     128 / 8,                     // Master Key length
+					     _masterSalt,                 // Master Salt
+					     112 / 8,                     // Master Salt length
+					     128 / 8,                     // encryption keyl
+					     160 / 8,                     // authentication key len
+					     112 / 8,                     // session salt len
+					     80 / 8);                     // authentication tag len
 }
 }