diff --git a/lxst_relay.py b/lxst_relay.py
index 421974d..5700f7b 100644
--- a/lxst_relay.py
+++ b/lxst_relay.py
@@ -24,7 +24,7 @@ from LXST import Pipeline
 from LXST.Network import SignallingReceiver, Packetizer, LinkSource
 from LXST.Sinks import LocalSink
 from LXST.Sources import LocalSource
-from LXST.Codecs import Opus
+from LXST.Codecs import Codec2
 from LXST.Codecs.Codec import Codec, CodecError
 from LXST.Primitives.Telephony import Signalling
 
@@ -158,7 +158,7 @@ class VoiceChannel:
             )
             participant.link_source = link_source
 
-            outgoing_codec = Opus(profile=Opus.PROFILE_VOICE_MEDIUM)
+            outgoing_codec = Codec2(mode=Codec2.CODEC2_1600)
             packetizer = Packetizer(destination=participant.link)
             participant.packetizer = packetizer
 
@@ -539,6 +539,7 @@ class LXSTRelay(SignallingReceiver):
             self.identity,
             display_name="LXST Channel Bot",
         )
+        
         self.lxmf_router.register_delivery_callback(
             self._lxmf_delivery_callback
         )
@@ -548,9 +549,7 @@ class LXSTRelay(SignallingReceiver):
         self.channel_manager.load_all()
 
         # ---- Startup announce ----
-        self.destination.announce()
-        self.bot_destination.announce()
-        self.channel_manager.announce_all()
+        self.announce()
 
         RNS.log(
             f"Relay lobby:    {RNS.prettyhexrep(self.destination.hash)}",
@@ -689,7 +688,7 @@ class LXSTRelay(SignallingReceiver):
             self._bot_reply(message, "No channels created yet.")
             return
 
-        channels = [RNS.hexrep(node.destination.hash, delimit=False) for node in self.channel_manager.channels.values()]
+        channels = [[name, RNS.hexrep(node.destination.hash, delimit=False)] for name, node in self.channel_manager.channels.items()]
         self._bot_reply(message, json.dumps(channels))
 
     # -- Send reply ----------------------------------------------------