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diff --git a/Protocols/SIP/lib/pjsip/pjmedia/include/pjmedia-codec/passthrough.h b/Protocols/SIP/lib/pjsip/pjmedia/include/pjmedia-codec/passthrough.h
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+++ b/Protocols/SIP/lib/pjsip/pjmedia/include/pjmedia-codec/passthrough.h
@@ -0,0 +1,106 @@
+/* $Id: passthrough.h 2875 2009-08-13 15:57:26Z bennylp $ */
+/* 
+ * Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com)
+ * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#ifndef __PJMEDIA_CODECS_PASSTHROUGH_H__
+#define __PJMEDIA_CODECS_PASSTHROUGH_H__
+
+/**
+ * @file pjmedia-codec/passthrough.h
+ * @brief Passthrough codecs.
+ */
+
+#include <pjmedia-codec/types.h>
+
+/**
+ * @defgroup PJMED_PASSTHROUGH_CODEC Passthrough Codecs
+ * @ingroup PJMEDIA_CODEC_CODECS
+ * @brief Implementation of passthrough codecs
+ * @{
+ *
+ * This section describes functions to register and register passthrough 
+ * codecs factory to the codec manager. After the codec factory has been 
+ * registered, application can use @ref PJMEDIA_CODEC API to manipulate 
+ * the codec. This codec factory contains various codecs, e.g: G.729, iLBC,
+ * AMR, and G.711.
+ *
+ * Passthrough codecs are codecs wrapper that does not perform encoding 
+ * or decoding, it just pack and parse encoded audio data from/into RTP 
+ * payload. This will accomodate pjmedia ports which work with encoded
+ * audio data, e.g: encoded audio files, sound device with capability
+ * of playing/recording encoded audio data.
+ */
+
+PJ_BEGIN_DECL
+
+
+/** 
+ * Codec passthrough configuration settings.
+ */
+typedef struct pjmedia_codec_passthrough_setting
+{
+    unsigned		 fmt_cnt;	/**< Number of encoding formats
+					     to be enabled.		*/
+    pjmedia_format	*fmts;		/**< Encoding formats to be 
+					     enabled.			*/
+    unsigned		 ilbc_mode;	/**< iLBC default mode.		*/
+} pjmedia_codec_passthrough_setting;
+
+
+/**
+ * Initialize and register passthrough codecs factory to pjmedia endpoint,
+ * all supported encoding formats will be enabled.
+ *
+ * @param endpt	    The pjmedia endpoint.
+ *
+ * @return	    PJ_SUCCESS on success.
+ */
+PJ_DECL(pj_status_t) pjmedia_codec_passthrough_init( pjmedia_endpt *endpt );
+
+
+/**
+ * Initialize and register passthrough codecs factory to pjmedia endpoint
+ * with only specified encoding formats enabled.
+ *
+ * @param endpt	    The pjmedia endpoint.
+ * @param setting   The settings, see @pjmedia_codec_passthrough_setting.
+ *
+ * @return	    PJ_SUCCESS on success.
+ */
+PJ_DECL(pj_status_t) pjmedia_codec_passthrough_init2(
+		       pjmedia_endpt *endpt,
+		       const pjmedia_codec_passthrough_setting *setting);
+
+
+/**
+ * Unregister passthrough codecs factory from pjmedia endpoint.
+ *
+ * @return	    PJ_SUCCESS on success.
+ */
+PJ_DECL(pj_status_t) pjmedia_codec_passthrough_deinit(void);
+
+
+PJ_END_DECL
+
+
+/**
+ * @}
+ */
+
+#endif	/* __PJMEDIA_CODECS_PASSTHROUGH_H__ */
+