--- libss7-2.0.original/isup.c	2014-06-09 23:48:47.000000000 +0400
+++ libss7-2.0/isup.c	2016-03-21 16:01:55.949311254 +0300
@@ -824,6 +824,7 @@
 
 static FUNC_RECV(opt_backward_call_ind_receive)
 {
+	c->inband_available = parm[0] & 0x1;
 	return 1;
 }
 
@@ -3810,6 +3811,7 @@
 			e->acm.opc = opc;	/* keep OPC information */
 			e->acm.called_party_status_ind = c->called_party_status_ind;
 			e->acm.echocontrol_ind = c->echocontrol_ind;
+			e->acm.inband_available = c->inband_available;
 			e->acm.got_sent_msg = c->got_sent_msg;
 			return 0;
 		case ISUP_CON: