Index: channels/chan_dahdi.c
===================================================================
--- channels/chan_dahdi.c	(revision 354798)
+++ channels/chan_dahdi.c	(working copy)
@@ -3522,6 +3522,61 @@
 #endif	/* defined(HAVE_SS7) */
 
 #if defined(HAVE_SS7)
+/*!
+ * \internal
+ * \brief Open the SS7 channel media path.
+ * \since 1.10
+ *
+ * \param p Channel private control structure.
+ *
+ * \return Nothing
+ */
+static void my_ss7_open_media(void *p)
+{
+        struct dahdi_pvt *pvt = p;
+        int res;
+        int dfd;
+        int set_val;
+
+#if 0
+        ast_debug(1,"my_ss7_open_media for channel %d\n",pvt->channel);
+#endif
+
+        dfd = pvt->subs[SUB_REAL].dfd;
+
+        /* Open the media path. */
+        set_val = 1;
+        res = ioctl(dfd, DAHDI_AUDIOMODE, &set_val);
+        if (res < 0) {
+                ast_log(LOG_WARNING, "Unable to enable audio mode on channel %d (%s)\n",
+                        pvt->channel, strerror(errno));
+        }
+
+        /* Set correct companding law for this call. */
+        res = dahdi_setlaw(dfd, pvt->law);
+        if (res < 0) {
+                ast_log(LOG_WARNING, "Unable to set law on channel %d\n", pvt->channel);
+        }
+
+        /* Set correct gain for this call. */
+        if (pvt->digital) {
+                res = set_actual_gain(dfd, 0, 0, pvt->rxdrc, pvt->txdrc, pvt->law);
+        } else {
+                res = set_actual_gain(dfd, pvt->rxgain, pvt->txgain, pvt->rxdrc, pvt->txdrc,
+                        pvt->law);
+        }
+        if (res < 0) {
+                ast_log(LOG_WARNING, "Unable to set gains on channel %d\n", pvt->channel);
+        }
+
+        if (pvt->dsp_features && pvt->dsp) {
+                ast_dsp_set_features(pvt->dsp, pvt->dsp_features);
+                pvt->dsp_features = 0;
+        }
+}
+#endif  /* defined(HAVE_SS7) */
+
+#if defined(HAVE_SS7)
 static struct sig_ss7_callback dahdi_ss7_callbacks =
 {
 	.lock_private = my_lock_private,
@@ -3543,6 +3598,7 @@
 	.set_remotelyblocked = my_set_remotelyblocked,
 	.set_callerid = my_set_callerid,
 	.set_dnid = my_set_dnid,
+        .open_media = my_ss7_open_media,
 };
 #endif	/* defined(HAVE_SS7) */
 
Index: channels/sig_ss7.c
===================================================================
--- channels/sig_ss7.c	(revision 354798)
+++ channels/sig_ss7.c	(working copy)
@@ -144,6 +144,22 @@
 }
 
 /*!
+* \internal
+* \brief Open the SS7 channel media path.
+* \since 1.10
+*
+* \param p Channel private control structure.
+*
+* \return Nothing
+*/
+static void sig_ss7_open_media(struct sig_ss7_chan *p)
+{
+        if (p->calls->open_media) {
+        p->calls->open_media(p->chan_pvt);
+        }
+}
+
+/*!
  * \internal
  * \brief Set the caller id information in the parent module.
  * \since 1.8
@@ -1546,6 +1562,10 @@
 	sig_ss7_set_dialing(p, 1);
 	ast_setstate(ast, AST_STATE_DIALING);
 	ss7_rel(p->ss7);
+
+        /*!!! Notify DAHDI channel abount opening media path (my be early media?). My be this point is wrong, read SS7 callflow. */
+        sig_ss7_open_media(p);
+
 	return 0;
 }
 
@@ -1616,6 +1636,12 @@
 	}
 	res = isup_anm(p->ss7->ss7, p->ss7call);
 	ss7_rel(p->ss7);
+
+        if(!res) {
+        /* Notify about open media channel */
+        sig_ss7_open_media(p);
+        }
+
 	return res;
 }
 
Index: channels/sig_ss7.h
===================================================================
--- channels/sig_ss7.h	(revision 354798)
+++ channels/sig_ss7.h	(working copy)
@@ -149,6 +149,7 @@
 	void (* const set_dnid)(void *pvt, const char *dnid);
 
 	void (* const queue_control)(void *pvt, int subclass);
+        void (* const open_media)(void *pvt);
 };
 
 struct sig_ss7_chan {