diff --git a/apps/sbc/CallLeg.cpp b/apps/sbc/CallLeg.cpp
index 9fb55ab8..6e5ab876 100644
--- a/apps/sbc/CallLeg.cpp
+++ b/apps/sbc/CallLeg.cpp
@@ -535,9 +535,34 @@ void CallLeg::b2bInitial2xx(AmSipReply& reply, bool forward)
 
 void CallLeg::onInitialReply(B2BSipReplyEvent *e)
 {
-    if (e->reply.code < 200) b2bInitial1xx(e->reply, e->forward);
-    else if (e->reply.code < 300) b2bInitial2xx(e->reply, e->forward);
-    else b2bInitialErr(e->reply, e->forward);
+  /* 100-199 */
+  if (e->reply.code < 200) {
+    string announce = getHeader(e->reply.hdrs, SIP_HDR_P_EARLY_ANNOUNCE);
+    dlg->setForcedEarlyAnnounce(announce.find("force") != std::string::npos);
+
+    /* exceptionally treat 183 with the 'P-Early-Announce: force',
+       similarly to the 200OK response, this will properly update the caller
+       with the late SDP capabilities (an early announcement),
+       which has been put on hold during the transfer
+
+       DSM applications using it:
+       - early_dbprompt (early_announce) */
+    if (e->reply.code == 183 && !announce.empty() && dlg->getForcedEarlyAnnounce()) {
+      b2bInitial2xx(e->reply, e->forward);
+    } else {
+      b2bInitial1xx(e->reply, e->forward);
+    }
+  }
+
+  /* 200-299 */
+  else if (e->reply.code < 300) {
+    b2bInitial2xx(e->reply, e->forward);
+  }
+
+  /* 300-699 */
+  else {
+    b2bInitialErr(e->reply, e->forward);
+  }
 }
 
 void CallLeg::b2bInitialErr(AmSipReply& reply, bool forward)
diff --git a/core/AmB2BMedia.cpp b/core/AmB2BMedia.cpp
index 5df69085..f1296876 100644
--- a/core/AmB2BMedia.cpp
+++ b/core/AmB2BMedia.cpp
@@ -874,14 +874,18 @@ void AmB2BMedia::updateStreamPair(AudioStreamPair &pair)
 
   TRACE("updating stream in A leg\n");
   pair.a.setDtmfSink(b);
+
   if (pair.b.getInput()) pair.a.setRelayStream(NULL); // don't mix relayed RTP into the other's input
   else pair.a.setRelayStream(pair.b.getStream());
+
   if (have_a) pair.a.initStream(playout_type, a_leg_local_sdp, a_leg_remote_sdp, pair.media_idx);
 
   TRACE("updating stream in B leg\n");
   pair.b.setDtmfSink(a);
+
   if (pair.a.getInput()) pair.b.setRelayStream(NULL); // don't mix relayed RTP into the other's input
   else pair.b.setRelayStream(pair.a.getStream());
+
   if (have_b) pair.b.initStream(playout_type, b_leg_local_sdp, b_leg_remote_sdp, pair.media_idx);
 
   TRACE("audio streams updated\n");
diff --git a/core/AmSipDialog.cpp b/core/AmSipDialog.cpp
index bec06024..168340cf 100644
--- a/core/AmSipDialog.cpp
+++ b/core/AmSipDialog.cpp
@@ -65,7 +65,7 @@ AmSipDialog::AmSipDialog(AmSipDialogEventHandler* h)
     offeranswer_enabled(true),
     early_session_started(false),session_started(false),
     pending_invites(0),
-    sdp_local(), sdp_remote()
+    sdp_local(), sdp_remote(), force_early_announce(false)
 {
 }
 
diff --git a/core/AmSipDialog.h b/core/AmSipDialog.h
index 79d732c8..2cfb8e42 100644
--- a/core/AmSipDialog.h
+++ b/core/AmSipDialog.h
@@ -59,6 +59,9 @@ protected:
   // Reliable provisional reply support
   Am100rel rel100;
 
+  /* dialog variables needed to properly handle 183->200OK faking */
+  bool force_early_announce;
+
   int onTxReply(const AmSipRequest& req, AmSipReply& reply, int& flags);
   int onTxRequest(AmSipRequest& req, int& flags);
 
@@ -99,6 +102,10 @@ protected:
   void setOAForceSDP(bool force) { oa.setForceSDP(force); }
   bool getOAForceSDP() const { return oa.getForceSDP(); }
 
+  /* getter/setter for faked 183 as 200OK responses, TT#187351 */
+  void setForcedEarlyAnnounce(bool value) { force_early_announce = value; }
+  bool getForcedEarlyAnnounce() { return force_early_announce; }
+
   const AmSdp& getLocalSdp() { return oa.getLocalSdp(); }
   const AmSdp& getRemoteSdp() { return oa.getRemoteSdp(); }
 
diff --git a/core/sip/defs.h b/core/sip/defs.h
index 9b3ecfb9..4d8746df 100644
--- a/core/sip/defs.h
+++ b/core/sip/defs.h
@@ -54,6 +54,7 @@
 #define SIP_HDR_EVENT            "Event"
 #define SIP_HDR_SUBSCRIPTION_STATE "Subscription-State"
 #define SIP_HDR_REPLACES          "Replaces"
+#define SIP_HDR_P_EARLY_ANNOUNCE "P-Early-Announce"
 
 #define SIP_HDR_COL(_hdr)       _hdr ":"
 #define SIP_HDR_COLSP(_hdr)     SIP_HDR_COL(_hdr) " "