diff --git a/code/game/machinery/tcomms/core.dm b/code/game/machinery/tcomms/core.dm
index 12650996e89..a072f9dd55c 100644
--- a/code/game/machinery/tcomms/core.dm
+++ b/code/game/machinery/tcomms/core.dm
@@ -43,6 +43,13 @@
 		visible_message("<span class='warning'>Error: Another core is already active in this sector. Power-up cancelled due to radio interference.</span>")
 	update_icon()
 
+	if(mapload) //Automatically links new midround tcomms cores to the cc relay
+		return
+	var/obj/machinery/tcomms/relay/cc/cc_relay = locateUID(GLOB.cc_tcomms_relay_uid)
+	if(cc_relay?.linked_core) //if we are already linked, ignore!
+		return
+	cc_relay.AddLink(src)
+
 /**
   * Destructor for the core.
   *
@@ -99,7 +106,7 @@
 		return TRUE
 
 	// Now we generate the list of where that signal should go to
-	tcm.zlevels = reachable_zlevels
+	tcm.zlevels = reachable_zlevels.Copy()
 	tcm.zlevels |= tcm.source_level
 
 	// Now check if they actually have pieces, if so, broadcast
diff --git a/code/game/machinery/tcomms/presets.dm b/code/game/machinery/tcomms/presets.dm
index 580bf080116..647ef13c359 100644
--- a/code/game/machinery/tcomms/presets.dm
+++ b/code/game/machinery/tcomms/presets.dm
@@ -31,3 +31,7 @@
 	hidden_link = TRUE
 	password_bypass = TRUE
 
+GLOBAL_VAR(cc_tcomms_relay_uid)
+/obj/machinery/tcomms/relay/cc/Initialize(mapload)
+	. = ..()
+	GLOB.cc_tcomms_relay_uid = UID()
diff --git a/code/game/objects/items/devices/radio/radio.dm b/code/game/objects/items/devices/radio/radio.dm
index d282899d0ea..bb37a165248 100644
--- a/code/game/objects/items/devices/radio/radio.dm
+++ b/code/game/objects/items/devices/radio/radio.dm
@@ -464,7 +464,9 @@ GLOBAL_LIST_INIT(default_medbay_channels, list(
 			// Simulate two seconds of lag
 			addtimer(CALLBACK(src, .proc/broadcast_callback, tcm), 2 SECONDS)
 		else
-			// Nukeops + Deathsquad headsets are instant and should work the same, whether there is comms or not
+			// Nukeops + Deathsquad headsets are instant and should work the same, whether there is comms or not, on all z levels
+			for(var/z in 1 to world.maxz)
+				tcm.zlevels |= z
 			broadcast_message(tcm)
 			qdel(tcm) // Delete the message datum
 		return TRUE