--- chan_dahdi.c
+++ chan_dahdi.c
@@ -381,6 +381,7 @@
 static int cur_adjpointcode = -1;
 static int cur_networkindicator = -1;
 static int cur_defaultdpc = -1;
+static int cur_slc = -1;
 #endif /* HAVE_SS7 */
 
 #ifdef HAVE_PRI
@@ -13948,6 +13949,11 @@
 		return -1;
 	} else
 		ss7_set_pc(link->ss7, cur_pointcode);
+	
+	if (cur_slc < 0) {
+		ast_log(LOG_ERROR, "Unspecified SLC!\n");
+		return -1;
+	}
 
 	if (sigchan < 0) {
 		ast_log(LOG_ERROR, "Invalid sigchan!\n");
@@ -13993,9 +13999,9 @@
 		}
 
 		if (p.sigtype == DAHDI_SIG_MTP2)
-			ss7_add_link(link->ss7, SS7_TRANSPORT_DAHDIMTP2, link->fds[curfd]);
+			ss7_add_link(link->ss7, SS7_TRANSPORT_DAHDIMTP2, link->fds[curfd], cur_slc);
 		else
-			ss7_add_link(link->ss7, SS7_TRANSPORT_DAHDIDCHAN, link->fds[curfd]);
+			ss7_add_link(link->ss7, SS7_TRANSPORT_DAHDIDCHAN, link->fds[curfd], cur_slc);
 
 		link->numsigchans++;
 
@@ -16086,6 +16092,8 @@
 				if (res < 0)
 					return -1;
 
+			} else if (!strcasecmp(v->name, "slc")) {
+				cur_slc = atoi(v->value);
 			} else if (!strcasecmp(v->name, "ss7_explicitacm")) {
 				struct dahdi_ss7 *link;
 				link = ss7_resolve_linkset(cur_linkset);