nncc_builtin: send CHAN MODE MODIFY after CALL PROCEEDING
This is specified in fifugre 7.10c of 3GPP TS 04.08.
diff --git a/openbsc/src/libmsc/mncc_builtin.c b/openbsc/src/libmsc/mncc_builtin.c
index 761fedb..99e0619 100644
--- a/openbsc/src/libmsc/mncc_builtin.c
+++ b/openbsc/src/libmsc/mncc_builtin.c
@@ -123,6 +123,12 @@
call->remote_ref = remote->callref;
remote->remote_ref = call->callref;
+ /* send call proceeding */
+ memset(&mncc, 0, sizeof(struct gsm_mncc));
+ mncc.callref = call->callref;
+ DEBUGP(DMNCC, "(call %x) Accepting call.\n", call->callref);
+ mncc_tx_to_cc(call->net, MNCC_CALL_PROC_REQ, &mncc);
+
/* modify mode */
memset(&mncc, 0, sizeof(struct gsm_mncc));
mncc.callref = call->callref;
@@ -130,12 +136,6 @@
DEBUGP(DMNCC, "(call %x) Modify channel mode.\n", call->callref);
mncc_tx_to_cc(call->net, MNCC_LCHAN_MODIFY, &mncc);
- /* send call proceeding */
- memset(&mncc, 0, sizeof(struct gsm_mncc));
- mncc.callref = call->callref;
- DEBUGP(DMNCC, "(call %x) Accepting call.\n", call->callref);
- mncc_tx_to_cc(call->net, MNCC_CALL_PROC_REQ, &mncc);
-
/* send setup to remote */
// setup->fields |= MNCC_F_SIGNAL;
// setup->signal = GSM48_SIGNAL_DIALTONE;