diff --git a/src/fne/network/callhandler/TagDMRData.cpp b/src/fne/network/callhandler/TagDMRData.cpp
index 43cd18c1..82032d9c 100644
--- a/src/fne/network/callhandler/TagDMRData.cpp
+++ b/src/fne/network/callhandler/TagDMRData.cpp
@@ -349,8 +349,40 @@ bool TagDMRData::processFrame(const uint8_t* data, uint32_t len, uint32_t peerId
 /// <returns></returns>
 bool TagDMRData::processGrantReq(uint32_t srcId, uint32_t dstId, uint8_t slot, bool unitToUnit, uint32_t peerId, uint16_t pktSeq, uint32_t streamId)
 {
-    // bryanb: TODO TODO TODO
-    return false;
+    // if we have an Rx status for the destination deny the grant
+    if (std::find_if(m_status.begin(), m_status.end(), [&](StatusMapPair x) { return x.second.dstId == dstId; }) != m_status.end()) {
+        return false;
+    }
+
+    // is the source ID a blacklisted ID?
+    lookups::RadioId rid = m_network->m_ridLookup->find(srcId);
+    if (!rid.radioDefault()) {
+        if (!rid.radioEnabled()) {
+            return false;
+        }
+    }
+
+    lookups::TalkgroupRuleGroupVoice tg = m_network->m_tidLookup->find(dstId);
+
+    // check TGID validity
+    if (tg.isInvalid()) {
+        return false;
+    }
+
+    if (!tg.config().active()) {
+        return false;
+    }
+
+    // repeat traffic to the connected peers
+    if (m_network->m_peers.size() > 0U) {
+        for (auto peer : m_network->m_peers) {
+            if (peerId != peer.first) {
+                write_CSBK_Grant(peer.first, srcId, dstId, 4U, !unitToUnit);
+            }
+        }
+    }
+
+    return true;
 }
 
 /// <summary>
@@ -816,6 +848,79 @@ bool TagDMRData::validate(uint32_t peerId, data::Data& data, uint32_t streamId)
     return true;
 }
 
+/// <summary>
+/// Helper to write a grant packet.
+/// </summary>
+/// <param name="peerId"></param>
+/// <param name="srcId"></param>
+/// <param name="dstId"></param>
+/// <param name="serviceOptions"></param>
+/// <param name="grp"></param>
+/// <returns></returns>
+bool TagDMRData::write_CSBK_Grant(uint32_t peerId, uint32_t srcId, uint32_t dstId, uint8_t serviceOptions, bool grp)
+{
+    uint8_t slot = 0U;
+
+    bool emergency = ((serviceOptions & 0xFFU) & 0x80U) == 0x80U;           // Emergency Flag
+    bool privacy = ((serviceOptions & 0xFFU) & 0x40U) == 0x40U;             // Privacy Flag
+    bool broadcast = ((serviceOptions & 0xFFU) & 0x10U) == 0x10U;           // Broadcast Flag
+    uint8_t priority = ((serviceOptions & 0xFFU) & 0x03U);                  // Priority
+
+    if (dstId == DMR_WUID_ALL) {
+        return true; // do not generate grant packets for $FFFF (All Call) TGID
+    }
+
+    // check the affiliations for this peer to see if we can grant traffic
+    lookups::AffiliationLookup* aff = m_network->m_peerAffiliations[peerId];
+    if (aff == nullptr) {
+        std::string peerIdentity = m_network->resolvePeerIdentity(peerId);
+        LogError(LOG_NET, "PEER %u (%s) has an invalid affiliations lookup? This shouldn't happen BUGBUG.", peerId, peerIdentity.c_str());
+        return false; // this will cause no traffic to pass for this peer now...I'm not sure this is good behavior
+    }
+    else {
+        if (!aff->hasGroupAff(dstId)) {
+            return false;
+        }
+    }
+
+    if (grp) {
+        std::unique_ptr<lc::csbk::CSBK_TV_GRANT> csbk = std::make_unique<lc::csbk::CSBK_TV_GRANT>();
+        if (broadcast)
+            csbk->setCSBKO(CSBKO_BTV_GRANT);
+        csbk->setLogicalCh1(0U);
+        csbk->setSlotNo(slot);
+
+        if (m_network->m_verbose) {
+            LogMessage(LOG_NET, "DMR, DT_CSBK, %s, emerg = %u, privacy = %u, broadcast = %u, prio = %u, chNo = %u, slot = %u, srcId = %u, dstId = %u, peerId = %u",
+                csbk->toString().c_str(), emergency, privacy, broadcast, priority, csbk->getLogicalCh1(), csbk->getSlotNo(), srcId, dstId, peerId);
+        }
+
+        csbk->setEmergency(emergency);
+        csbk->setSrcId(srcId);
+        csbk->setDstId(dstId);
+
+        write_CSBK(peerId, 1U, csbk.get());
+    }
+    else {
+        std::unique_ptr<lc::csbk::CSBK_PV_GRANT> csbk = std::make_unique<lc::csbk::CSBK_PV_GRANT>();
+        csbk->setLogicalCh1(0U);
+        csbk->setSlotNo(slot);
+
+        if (m_network->m_verbose) {
+            LogMessage(LOG_NET, "DMR, DT_CSBK, %s, emerg = %u, privacy = %u, broadcast = %u, prio = %u, chNo = %u, slot = %u, srcId = %u, dstId = %u, peerId = %u",
+                csbk->toString().c_str(), emergency, privacy, broadcast, priority, csbk->getLogicalCh1(), csbk->getSlotNo(), srcId, dstId, peerId);
+        }
+
+        csbk->setEmergency(emergency);
+        csbk->setSrcId(srcId);
+        csbk->setDstId(dstId);
+
+        write_CSBK(peerId, 1U, csbk.get());
+    }
+
+    return true;
+}
+
 /// <summary>
 /// Helper to write a NACK RSP packet.
 /// </summary>
diff --git a/src/fne/network/callhandler/TagDMRData.h b/src/fne/network/callhandler/TagDMRData.h
index 2abc88bd..f3c6abc4 100644
--- a/src/fne/network/callhandler/TagDMRData.h
+++ b/src/fne/network/callhandler/TagDMRData.h
@@ -100,6 +100,8 @@ namespace network
             /// <summary>Helper to validate the DMR call stream.</summary>
             bool validate(uint32_t peerId, dmr::data::Data& data, uint32_t streamId);
 
+            /// <summary>Helper to write a grant packet.</summary>
+            bool write_CSBK_Grant(uint32_t peerId, uint32_t srcId, uint32_t dstId, uint8_t serviceOptions, bool grp);
             /// <summary>Helper to write a NACK RSP packet.</summary>
             void write_CSBK_NACK_RSP(uint32_t peerId, uint32_t dstId, uint8_t reason, uint8_t service);
 
diff --git a/src/fne/network/callhandler/TagNXDNData.cpp b/src/fne/network/callhandler/TagNXDNData.cpp
index be356863..4ea870bb 100644
--- a/src/fne/network/callhandler/TagNXDNData.cpp
+++ b/src/fne/network/callhandler/TagNXDNData.cpp
@@ -313,8 +313,40 @@ bool TagNXDNData::processFrame(const uint8_t* data, uint32_t len, uint32_t peerI
 /// <returns></returns>
 bool TagNXDNData::processGrantReq(uint32_t srcId, uint32_t dstId, bool unitToUnit, uint32_t peerId, uint16_t pktSeq, uint32_t streamId)
 {
-    // bryanb: TODO TODO TODO
-    return false;
+    // if we have an Rx status for the destination deny the grant
+    if (std::find_if(m_status.begin(), m_status.end(), [&](StatusMapPair x) { return x.second.dstId == dstId; }) != m_status.end()) {
+        return false;
+    }
+
+    // is the source ID a blacklisted ID?
+    lookups::RadioId rid = m_network->m_ridLookup->find(srcId);
+    if (!rid.radioDefault()) {
+        if (!rid.radioEnabled()) {
+            return false;
+        }
+    }
+
+    lookups::TalkgroupRuleGroupVoice tg = m_network->m_tidLookup->find(dstId);
+
+    // check TGID validity
+    if (tg.isInvalid()) {
+        return false;
+    }
+
+    if (!tg.config().active()) {
+        return false;
+    }
+
+    // repeat traffic to the connected peers
+    if (m_network->m_peers.size() > 0U) {
+        for (auto peer : m_network->m_peers) {
+            if (peerId != peer.first) {
+                write_Message_Grant(peer.first, srcId, dstId, 4U, !unitToUnit);
+            }
+        }
+    }
+
+    return true;
 }
 
 /// <summary>
@@ -604,6 +636,55 @@ bool TagNXDNData::validate(uint32_t peerId, lc::RTCH& lc, uint8_t messageType, u
     return true;
 }
 
+/// <summary>
+/// Helper to write a grant packet.
+/// </summary>
+/// <param name="peerId"></param>
+/// <param name="srcId"></param>
+/// <param name="dstId"></param>
+/// <param name="serviceOptions"></param>
+/// <param name="grp"></param>
+/// <returns></returns>
+bool TagNXDNData::write_Message_Grant(uint32_t peerId, uint32_t srcId, uint32_t dstId, uint8_t serviceOptions, bool grp)
+{
+    bool emergency = ((serviceOptions & 0xFFU) & 0x80U) == 0x80U;           // Emergency Flag
+    bool encryption = ((serviceOptions & 0xFFU) & 0x40U) == 0x40U;          // Encryption Flag
+    uint8_t priority = ((serviceOptions & 0xFFU) & 0x07U);                  // Priority
+
+    std::unique_ptr<lc::rcch::MESSAGE_TYPE_VCALL_CONN> rcch = std::make_unique<lc::rcch::MESSAGE_TYPE_VCALL_CONN>();
+
+    // check the affiliations for this peer to see if we can grant traffic
+    lookups::AffiliationLookup* aff = m_network->m_peerAffiliations[peerId];
+    if (aff == nullptr) {
+        std::string peerIdentity = m_network->resolvePeerIdentity(peerId);
+        LogError(LOG_NET, "PEER %u (%s) has an invalid affiliations lookup? This shouldn't happen BUGBUG.", peerId, peerIdentity.c_str());
+        return false; // this will cause no traffic to pass for this peer now...I'm not sure this is good behavior
+    }
+    else {
+        if (!aff->hasGroupAff(dstId)) {
+            return false;
+        }
+    }
+
+    rcch->setMessageType(RTCH_MESSAGE_TYPE_VCALL);
+    rcch->setGrpVchNo(0U);
+    rcch->setGroup(grp);
+    rcch->setSrcId(srcId);
+    rcch->setDstId(dstId);
+
+    rcch->setEmergency(emergency);
+    rcch->setEncrypted(encryption);
+    rcch->setPriority(priority);
+
+    if (m_network->m_verbose) {
+        LogMessage(LOG_NET, "NXDN, %s, emerg = %u, encrypt = %u, prio = %u, chNo = %u, srcId = %u, dstId = %u, peerId = %u",
+            rcch->toString().c_str(), rcch->getEmergency(), rcch->getEncrypted(), rcch->getPriority(), rcch->getGrpVchNo(), rcch->getSrcId(), rcch->getDstId(), peerId);
+    }
+
+    write_Message(peerId, rcch.get());
+    return true;
+}
+
 /// <summary>
 /// Helper to write a deny packet.
 /// </summary>
diff --git a/src/fne/network/callhandler/TagNXDNData.h b/src/fne/network/callhandler/TagNXDNData.h
index 8b997186..a3e70a5b 100644
--- a/src/fne/network/callhandler/TagNXDNData.h
+++ b/src/fne/network/callhandler/TagNXDNData.h
@@ -89,6 +89,8 @@ namespace network
             /// <summary>Helper to validate the NXDN call stream.</summary>
             bool validate(uint32_t peerId, nxdn::lc::RTCH& control, uint8_t messageType, uint32_t streamId);
 
+            /// <summary>Helper to write a grant packet.</summary>
+            bool write_Message_Grant(uint32_t peerId, uint32_t srcId, uint32_t dstId, uint8_t serviceOptions, bool grp);
             /// <summary>Helper to write a deny packet.</summary>
             void write_Message_Deny(uint32_t peerId, uint32_t srcId, uint32_t dstId, uint8_t reason, uint8_t service);
 
diff --git a/src/fne/network/callhandler/TagP25Data.cpp b/src/fne/network/callhandler/TagP25Data.cpp
index 38d3e35c..46b3a5dc 100644
--- a/src/fne/network/callhandler/TagP25Data.cpp
+++ b/src/fne/network/callhandler/TagP25Data.cpp
@@ -29,6 +29,12 @@ using namespace p25;
 #include <cassert>
 #include <chrono>
 
+// ---------------------------------------------------------------------------
+//  Constants
+// ---------------------------------------------------------------------------
+
+const uint32_t GRANT_TIMER_TIMEOUT = 15U;
+
 // ---------------------------------------------------------------------------
 //  Public Class Members
 // ---------------------------------------------------------------------------
@@ -384,8 +390,40 @@ bool TagP25Data::processFrame(const uint8_t* data, uint32_t len, uint32_t peerId
 /// <returns></returns>
 bool TagP25Data::processGrantReq(uint32_t srcId, uint32_t dstId, bool unitToUnit, uint32_t peerId, uint16_t pktSeq, uint32_t streamId)
 {
-    // bryanb: TODO TODO TODO
-    return false;
+    // if we have an Rx status for the destination deny the grant
+    if (std::find_if(m_status.begin(), m_status.end(), [&](StatusMapPair x) { return x.second.dstId == dstId; }) != m_status.end()) {
+        return false;
+    }
+
+    // is the source ID a blacklisted ID?
+    lookups::RadioId rid = m_network->m_ridLookup->find(srcId);
+    if (!rid.radioDefault()) {
+        if (!rid.radioEnabled()) {
+            return false;
+        }
+    }
+
+    lookups::TalkgroupRuleGroupVoice tg = m_network->m_tidLookup->find(dstId);
+
+    // check TGID validity
+    if (tg.isInvalid()) {
+        return false;
+    }
+
+    if (!tg.config().active()) {
+        return false;
+    }
+
+    // repeat traffic to the connected peers
+    if (m_network->m_peers.size() > 0U) {
+        for (auto peer : m_network->m_peers) {
+            if (peerId != peer.first) {
+                write_TSDU_Grant(peer.first, srcId, dstId, 4U, !unitToUnit);
+            }
+        }
+    }
+
+    return true;
 }
 
 /// <summary>
@@ -1123,6 +1161,76 @@ bool TagP25Data::validate(uint32_t peerId, lc::LC& control, uint8_t duid, const
     return true;
 }
 
+
+/// <summary>
+/// Helper to write a grant packet.
+/// </summary>
+/// <param name="peerId"></param>
+/// <param name="srcId"></param>
+/// <param name="dstId"></param>
+/// <param name="grp"></param>
+/// <returns></returns>
+bool TagP25Data::write_TSDU_Grant(uint32_t peerId, uint32_t srcId, uint32_t dstId, uint8_t serviceOptions, bool grp)
+{
+    bool emergency = ((serviceOptions & 0xFFU) & 0x80U) == 0x80U;           // Emergency Flag
+    bool encryption = ((serviceOptions & 0xFFU) & 0x40U) == 0x40U;          // Encryption Flag
+    uint8_t priority = ((serviceOptions & 0xFFU) & 0x07U);                  // Priority
+
+    if (dstId == P25_TGID_ALL) {
+        return true; // do not generate grant packets for $FFFF (All Call) TGID
+    }
+
+    // check the affiliations for this peer to see if we can grant traffic
+    lookups::AffiliationLookup* aff = m_network->m_peerAffiliations[peerId];
+    if (aff == nullptr) {
+        std::string peerIdentity = m_network->resolvePeerIdentity(peerId);
+        LogError(LOG_NET, "PEER %u (%s) has an invalid affiliations lookup? This shouldn't happen BUGBUG.", peerId, peerIdentity.c_str());
+        return false; // this will cause no traffic to pass for this peer now...I'm not sure this is good behavior
+    }
+    else {
+        if (!aff->hasGroupAff(dstId)) {
+            return false;
+        }
+    }
+
+    if (grp) {
+        std::unique_ptr<lc::tsbk::IOSP_GRP_VCH> iosp = std::make_unique<lc::tsbk::IOSP_GRP_VCH>();
+        iosp->setSrcId(srcId);
+        iosp->setDstId(dstId);
+        iosp->setGrpVchId(0U);
+        iosp->setGrpVchNo(0U);
+        iosp->setEmergency(emergency);
+        iosp->setEncrypted(encryption);
+        iosp->setPriority(priority);
+
+        if (m_network->m_verbose) {
+            LogMessage(LOG_NET, P25_TSDU_STR ", %s, emerg = %u, encrypt = %u, prio = %u, chNo = %u, srcId = %u, dstId = %u, peerId = %u",
+                iosp->toString().c_str(), iosp->getEmergency(), iosp->getEncrypted(), iosp->getPriority(), iosp->getGrpVchNo(), iosp->getSrcId(), iosp->getDstId(), peerId);
+        }
+
+        write_TSDU(peerId, iosp.get());
+    }
+    else {
+        std::unique_ptr<lc::tsbk::IOSP_UU_VCH> iosp = std::make_unique<lc::tsbk::IOSP_UU_VCH>();
+        iosp->setSrcId(srcId);
+        iosp->setDstId(dstId);
+        iosp->setGrpVchId(0U);
+        iosp->setGrpVchNo(0U);
+        iosp->setEmergency(emergency);
+        iosp->setEncrypted(encryption);
+        iosp->setPriority(priority);
+
+        if (m_network->m_verbose) {
+            LogMessage(LOG_NET, P25_TSDU_STR ", %s, emerg = %u, encrypt = %u, prio = %u, chNo = %u, srcId = %u, dstId = %u, peerId = %u",
+                iosp->toString().c_str(), iosp->getEmergency(), iosp->getEncrypted(), iosp->getPriority(), iosp->getGrpVchNo(), iosp->getSrcId(), iosp->getDstId(), peerId);
+        }
+
+        write_TSDU(peerId, iosp.get());
+    }
+
+    return true;
+}
+
 /// <summary>
 /// Helper to write a deny packet.
 /// </summary>
diff --git a/src/fne/network/callhandler/TagP25Data.h b/src/fne/network/callhandler/TagP25Data.h
index 3ee2c85e..b5cdba9e 100644
--- a/src/fne/network/callhandler/TagP25Data.h
+++ b/src/fne/network/callhandler/TagP25Data.h
@@ -113,6 +113,8 @@ namespace network
             /// <summary>Helper to validate the P25 call stream.</summary>
             bool validate(uint32_t peerId, p25::lc::LC& control, uint8_t duid, const p25::lc::TSBK* tsbk, uint32_t streamId);
 
+            /// <summary>Helper to write a grant packet.</summary>
+            bool write_TSDU_Grant(uint32_t peerId, uint32_t srcId, uint32_t dstId, uint8_t serviceOptions, bool grp);
             /// <summary>Helper to write a deny packet.</summary>
             void write_TSDU_Deny(uint32_t peerId, uint32_t srcId, uint32_t dstId, uint8_t reason, uint8_t service, bool group = false, bool aiv = false);
             /// <summary>Helper to write a queue packet.</summary>