diff -Nur channels.old/chan_mobile.c channels/chan_mobile.c
--- channels.old/chan_mobile.c	2009-07-13 22:03:10.000000000 +0200
+++ channels/chan_mobile.c	2009-07-13 22:04:10.000000000 +0200
@@ -330,6 +330,7 @@
 	struct hfp_cind cind_map;	/*!< the cind name to index mapping for this AG */
 	int rsock;			/*!< our rfcomm socket */
 	int rport;			/*!< our rfcomm port */
+	int sent_alerting;		/*!< have we sent alerting? */
 };
 
 
@@ -427,6 +428,7 @@
 	AT_BUSY,
 	AT_NO_DIALTONE,
 	AT_NO_CARRIER,
+	AT_ECAM,
 } at_message_t;
 
 static int at_match_prefix(char *buf, char *prefix);
@@ -1900,6 +1902,8 @@
 		return AT_NO_DIALTONE;
 	} else if (at_match_prefix(buf, "NO CARRIER")) {
 		return AT_NO_CARRIER;
+	} else if (at_match_prefix(buf, "*ECAV:")) {
+		return AT_ECAM;
 	} else {
 		return AT_UNKNOWN;
 	}
@@ -1977,6 +1981,8 @@
 		return "AT+CIND=?";
 	case AT_CUSD:
 		return "AT+CUSD";
+	case AT_ECAM:
+		return "AT*ECAM";
 	}
 }
 
@@ -1985,6 +1991,54 @@
  * bluetooth handsfree profile helpers
  */
 
+ /*!
+ * \brief Parse a ECAV event.
+ * \param hfp an hfp_pvt struct
+ * \param buf the buffer to parse (null terminated)
+ * \return -1 on error (parse error) or a ECAM value on success
+ */
+static int hfp_parse_ecav(struct hfp_pvt *hfp, char *buf)
+{
+	char command[] = "*ECAV:";
+	char trimmedString[1024];
+	int length;
+
+	length = strcspn(buf,command) + strlen(command);
+
+	if (buf[length] == ' ') {
+		length++;
+	}
+
+	strncpy(trimmedString, &buf[length], sizeof(trimmedString));
+
+	char seperator[] = ",";
+	char *commandValue;
+	int i=0;
+
+	commandValue = strtok(trimmedString, seperator);
+
+	while(commandValue != NULL) {
+		if (i==1)
+		{
+			return atoi(commandValue);
+		}
+
+		commandValue = strtok(NULL, seperator);
+		i++;
+	}
+
+	return -1;
+}
+
+/*!
+ * \brief Enable sony erricson extensions / indications.
+ * \param hfp an hfp_pvt struct
+ */
+static int hfp_send_ecam(struct hfp_pvt *hfp)
+{
+	return rfcomm_write(hfp->rsock, "AT*ECAM=1\r");
+}
+
 /*!
  * \brief Parse a CIEV event.
  * \param hfp an hfp_pvt struct
@@ -3091,6 +3145,14 @@
 			break;
 		case AT_CLIP:
 			ast_debug(1, "[%s] caling line indication enabled\n", pvt->id);
+			if (hfp_send_ecam(pvt->hfp) || msg_queue_push(pvt, AT_OK, AT_ECAM)) {
+				ast_debug(1, "[%s] error synchronizing gain settings\n", pvt->id);
+				goto e_return;
+			}
+
+			break;
+		case AT_ECAM:
+			ast_debug(1, "[%s] Sony Ericsson call monitoring is active on device\n", pvt->id);
 			if (hfp_send_vgs(pvt->hfp, 15) || msg_queue_push(pvt, AT_OK, AT_VGS)) {
 				ast_debug(1, "[%s] error synchronizing gain settings\n", pvt->id);
 				goto e_return;
@@ -3222,6 +3284,21 @@
 			ast_debug(1, "[%s] error setting CNMI\n", pvt->id);
 			ast_debug(1, "[%s] no SMS support\n", pvt->id);
 			break;
+		case AT_ECAM:
+			ast_debug(1, "[%s] does not support Sony Ericsson extensions\n", pvt->id);
+
+			/* this is not a fatal error, let's continue with initilization */
+
+			if (hfp_send_vgs(pvt->hfp, 15) || msg_queue_push(pvt, AT_OK, AT_VGS)) {
+				ast_debug(1, "[%s] error synchronizing gain settings\n", pvt->id);
+				goto e_return;
+			}
+
+			pvt->timeout = -1;
+			pvt->hfp->initialized = 1;
+			ast_verb(3, "Bluetooth Device %s initialized and ready.\n", pvt->id);
+
+			break;
 		/* end initilization stuff */
 
 		case AT_A:
@@ -3317,6 +3394,9 @@
 		case HFP_CIND_CALLSETUP_NONE:
 			if (pvt->hfp->cind_state[pvt->hfp->cind_map.call] != HFP_CIND_CALL_ACTIVE) {
 				if (pvt->owner) {
+					if (pvt->hfp->sent_alerting == 1) {
+						handle_response_busy(pvt);
+					}
 					if (mbl_queue_hangup(pvt)) {
 						ast_log(LOG_ERROR, "[%s] error queueing hangup, disconnectiong...\n", pvt->id);
 						return -1;
@@ -3335,6 +3415,7 @@
 			break;
 		case HFP_CIND_CALLSETUP_OUTGOING:
 			if (pvt->outgoing) {
+				pvt->hfp->sent_alerting = 0;
 				ast_debug(1, "[%s] outgoing call\n", pvt->id);
 			} else {
 				ast_verb(3, "[%s] user dialed from handset, disconnecting\n", pvt->id);
@@ -3345,6 +3426,7 @@
 			if (pvt->outgoing) {
 				ast_debug(1, "[%s] remote alerting\n", pvt->id);
 				mbl_queue_control(pvt, AST_CONTROL_RINGING);
+				pvt->hfp->sent_alerting = 1;
 			}
 			break;
 		}
@@ -3548,6 +3630,7 @@
 {
 	pvt->hangupcause = AST_CAUSE_USER_BUSY;
 	pvt->needchup = 1;
+	mbl_queue_control(pvt, AST_CONTROL_BUSY);
 	return 0;
 }
 
@@ -3763,6 +3846,16 @@
 			}
 			ast_mutex_unlock(&pvt->lock);
 			break;
+		case AT_ECAM:
+			ast_mutex_lock(&pvt->lock);
+			if (hfp_parse_ecav(pvt, buf) == 7) {
+				if (handle_response_busy(pvt)) {
+					ast_mutex_unlock(&pvt->lock);
+					goto e_cleanup;
+				}
+			}
+			ast_mutex_unlock(&pvt->lock);
+			break;
 		case AT_UNKNOWN:
 			ast_debug(1, "[%s] ignoring unknown message: %s\n", pvt->id, buf);
 			break;