diff --git a/src/gsm.c b/src/gsm.c
index 39615a2..619a6f1 100644
--- a/src/gsm.c
+++ b/src/gsm.c
@@ -219,6 +219,7 @@ static int _gsm_modem_hangup(GSM * gsm);
 static int _gsm_modem_send_message(GSM * gsm, char const * number,
 		char const * text);
 static int _gsm_modem_set_echo(GSM * gsm, gboolean echo);
+static int _gsm_modem_set_extended_ring(GSM * gsm, gboolean extended);
 static int _gsm_modem_set_functional(GSM * gsm, gboolean functional);
 static int _gsm_modem_set_message_format(GSM * gsm, GSMMessageFormat format);
 static int _gsm_modem_set_operator_format(GSM * gsm, GSMOperatorFormat format);
@@ -445,6 +446,13 @@ int gsm_set_retry(GSM * gsm, unsigned int retry)
 }
 
 
+/* gsm_set_extended_ring */
+int gsm_set_extended_ring(GSM * gsm, gboolean extended)
+{
+	return _gsm_modem_set_extended_ring(gsm, extended);
+}
+
+
 /* useful */
 /* gsm_answer */
 int gsm_answer(GSM * gsm)
@@ -1174,6 +1182,16 @@ static int _gsm_modem_set_echo(GSM * gsm, gboolean echo)
 }
 
 
+/* gsm_modem_set_extended_ring */
+static int _gsm_modem_set_extended_ring(GSM * gsm, gboolean extended)
+{
+	char cmd[] = "AT+CRC=X";
+
+	cmd[7] = extended ? '1' : '0';
+	return (_gsm_queue(gsm, cmd) != NULL) ? 0 : 1;
+}
+
+
 /* gsm_modem_set_functional */
 static int _gsm_modem_set_functional(GSM * gsm, gboolean functional)
 {
@@ -1347,6 +1365,7 @@ static int _parse_do(GSM * gsm)
 		gsm->mode = GSM_MODE_COMMAND;
 		_gsm_modem_set_echo(gsm, FALSE);
 		_gsm_modem_set_verbose(gsm, TRUE);
+		_gsm_modem_set_extended_ring(gsm, TRUE);
 		_gsm_modem_set_functional(gsm, TRUE);
 		_gsm_modem_get_model(gsm);
 		_gsm_event_set_status(gsm, GSM_STATUS_INITIALIZED);
diff --git a/src/gsm.h b/src/gsm.h
index 5c01308..ada3fc5 100644
--- a/src/gsm.h
+++ b/src/gsm.h
@@ -206,6 +206,7 @@ int gsm_set_operator_format(GSM * gsm, GSMOperatorFormat format);
 int gsm_set_operator_mode(GSM * gsm, GSMOperatorMode mode);
 int gsm_set_registration_report(GSM * gsm, GSMRegistrationReport report);
 int gsm_set_retry(GSM * gsm, unsigned int retry);
+int gsm_set_extended_ring(GSM * gsm, gboolean extended);
 
 /* useful */
 int gsm_answer(GSM * gsm);