transmit C_WACKD after voice call requests;

src/dmr/DMRDefines.h

@@ -246,6 +246,11 @@ namespace dmr
     const uint8_t   TS_DENY_RSN_TGT_BUSY = 0x2EU;
     const uint8_t   TS_DENY_RSN_TGT_GROUP_NOT_VALID = 0x2FU;
 
+    const uint8_t   TS_QUEUED_RSN_NO_RESOURCE = 0xA0U;
+    const uint8_t   TS_QUEUED_RSN_SYS_BUSY = 0xA1U;
+
+    const uint8_t   TS_WAIT_RSN = 0xE0U;
+
     const uint8_t   MS_DENY_RSN_UNSUPPORTED_SVC = 0x00U;
 
     // Random Access Service Kind

src/dmr/packet/ControlSignaling.cpp

@@ -216,6 +216,8 @@ bool ControlSignaling::process(uint8_t* data, uint32_t len)
                     // verify the source RID is registered
                     VERIFY_SRCID_REG("DT_CSBK, CSBKO_RAND (Random Access), SVC_KIND_IND_VOICE_CALL (Individual Voice Call)", SVC_KIND_IND_VOICE_CALL, srcId);
 
+                    writeRF_CSBK_ACK_RSP(srcId, TS_WAIT_RSN, 1U);
+
                     if (m_slot->m_authoritative) {
                         writeRF_CSBK_Grant(srcId, dstId, isp->getServiceOptions(), false);
                     } else {
@@ -232,6 +234,8 @@ bool ControlSignaling::process(uint8_t* data, uint32_t len)
                     // validate the talkgroup ID
                     VALID_TGID("DT_CSBK, CSBKO_RAND (Random Access), SVC_KIND_GRP_VOICE_CALL (Group Voice Call)", SVC_KIND_GRP_VOICE_CALL, srcId, dstId);
 
+                    writeRF_CSBK_ACK_RSP(srcId, TS_WAIT_RSN, 1U);
+
                     if (m_slot->m_authoritative) {
                         writeRF_CSBK_Grant(srcId, dstId, isp->getServiceOptions(), true);
                     } else {
@@ -252,6 +256,8 @@ bool ControlSignaling::process(uint8_t* data, uint32_t len)
                     // verify the source RID is registered
                     VERIFY_SRCID_REG("DT_CSBK, CSBKO_RAND (Random Access), SVC_KIND_IND_VOICE_CALL (Individual Voice Call)", SVC_KIND_IND_VOICE_CALL, srcId);
 
+                    writeRF_CSBK_ACK_RSP(srcId, TS_WAIT_RSN, 0U);
+
                     writeRF_CSBK_Data_Grant(srcId, dstId, isp->getServiceOptions(), false);
                     break;
                 case SVC_KIND_GRP_DATA_CALL:
@@ -265,6 +271,8 @@ bool ControlSignaling::process(uint8_t* data, uint32_t len)
                     // validate the talkgroup ID
                     VALID_TGID("DT_CSBK, CSBKO_RAND (Random Access), SVC_KIND_GRP_VOICE_CALL (Group Voice Call)", SVC_KIND_GRP_VOICE_CALL, srcId, dstId);
 
+                    writeRF_CSBK_ACK_RSP(srcId, TS_WAIT_RSN, 0U);
+
                     writeRF_CSBK_Data_Grant(srcId, dstId, isp->getServiceOptions(), true);
                     break;
                 case SVC_KIND_REG_SVC: