diff --git a/virt-nitb/audio_frame.sh b/virt-nitb/audio_frame.sh
new file mode 100755
index 0000000..7111ddb
--- /dev/null
+++ b/virt-nitb/audio_frame.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+set -x
+osmo_interact_vty.py -H 127.0.0.1 -p 4247 -c "enable;audio_frame 1"
diff --git a/virt-nitb/call.sh b/virt-nitb/call.sh
index e21dd7b..1eeba45 100755
--- a/virt-nitb/call.sh
+++ b/virt-nitb/call.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
+set -x
 osmo_interact_vty.py -H 127.0.0.1 -p 4247 -c "enable;call 1 2"
 sleep 5
 osmo_interact_vty.py -H 127.0.0.2 -p 4247 -c "enable;call 2 answer"
diff --git a/virt-nitb/hangup.sh b/virt-nitb/hangup.sh
index 7f68eb8..3aee2c6 100755
--- a/virt-nitb/hangup.sh
+++ b/virt-nitb/hangup.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
+set -x
 osmo_interact_vty.py -H 127.0.0.1 -p 4247 -c "enable;call 1 hangup"
-
diff --git a/virt-nitb/mobile.cfg b/virt-nitb/mobile.cfg
index 5277109..1c95658 100644
--- a/virt-nitb/mobile.cfg
+++ b/virt-nitb/mobile.cfg
@@ -1,6 +1,7 @@
 ms 1
  layer2-socket /tmp/osmocom_l2
  sap-socket /tmp/osmocom_sap
+ imei 111111111111111
  sim test
  test-sim
   imsi 901700000000001
@@ -22,7 +23,7 @@ log file current_log/mobile1.log
  logging level lglobal info
  logging level lsms info
  logging level rsl notice
- logging level rr debug
+ logging level rr notice
  logging level plmn debug
  logging level cs debug
  logging level nb notice
@@ -54,7 +55,7 @@ log stderr
  logging level lglobal info
  logging level lsms info
  logging level rsl notice
- logging level rr debug
+ logging level rr notice
  logging level plmn debug
  logging level cs debug
  logging level nb notice
@@ -86,7 +87,7 @@ log gsmtap 127.0.0.12
  logging level lglobal info
  logging level lsms info
  logging level rsl notice
- logging level rr debug
+ logging level rr notice
  logging level plmn debug
  logging level cs debug
  logging level nb notice
diff --git a/virt-nitb/mobile2.cfg b/virt-nitb/mobile2.cfg
index c773131..283f384 100644
--- a/virt-nitb/mobile2.cfg
+++ b/virt-nitb/mobile2.cfg
@@ -4,6 +4,7 @@ line vty
 ms 2
  layer2-socket /tmp/osmocom_l2
  sap-socket /tmp/osmocom_sap
+ imei 222222222222222
  sim test
  test-sim
   imsi 901700000000002
@@ -11,6 +12,8 @@ ms 2
   no barred-access
   rplmn 901 70
   hplmn-search everywhere
+ audio
+  io-handler loopback
  no shutdown
 
 log file current_log/mobile2.log
@@ -25,7 +28,7 @@ log file current_log/mobile2.log
  logging level lglobal info
  logging level lsms info
  logging level rsl notice
- logging level rr debug
+ logging level rr notice
  logging level plmn debug
  logging level cs debug
  logging level nb notice
@@ -57,7 +60,7 @@ log stderr
  logging level lglobal info
  logging level lsms info
  logging level rsl notice
- logging level rr debug
+ logging level rr notice
  logging level plmn debug
  logging level cs debug
  logging level nb notice
@@ -89,7 +92,7 @@ log gsmtap 127.0.0.11
  logging level lglobal info
  logging level lsms info
  logging level rsl notice
- logging level rr debug
+ logging level rr notice
  logging level plmn debug
  logging level cs debug
  logging level nb notice
diff --git a/virt-nitb/osmo-bsc.cfg b/virt-nitb/osmo-bsc.cfg
index a9528d9..bd674e7 100644
--- a/virt-nitb/osmo-bsc.cfg
+++ b/virt-nitb/osmo-bsc.cfg
@@ -24,7 +24,7 @@ network
   location_area_code 23
   cell_identity 0
   base_station_id_code 0
-  codec-support fr amr
+  codec-support fr hr efr amr
   amr tch-f modes 2 3 5 7
   amr tch-f start-mode 2
   amr tch-h modes 2 3 5
diff --git a/virt-nitb/run.sh b/virt-nitb/run.sh
index dea3c39..4ae614b 100755
--- a/virt-nitb/run.sh
+++ b/virt-nitb/run.sh
@@ -23,7 +23,7 @@ term() {
   if [ -z "$title" ]; then
     title="$(basename $@)"
   fi
-  exec $terminal -title "CN:$title" -e sh -c "$1; echo; while true; do echo 'q Enter to close'; read q_to_close; if [ \"x\$q_to_close\" = xq ]; then break; fi; done"
+  exec $terminal -title "CN:$title" -e sh -c "$1; echo; while sleep 1; do echo 'q Enter to close'; read q_to_close; if [ \"x\$q_to_close\" = xq ]; then break; fi; done"
 }
 
 find_term
@@ -104,7 +104,7 @@ sleep .2
 term "$virtphy" virtphy &
 sleep .2
 term "$ms1" MS1 &
-sleep .2
+sleep 3
 term "$ms2" MS2 &
 
 if [ "x$SIPCON_SERVER" != "xinternal" ]; then
@@ -125,6 +125,9 @@ read enter_to_close
 echo Closing...
 #set -x
 
+killall -2 mobile
+sleep 3
+
 if [ "x$SIPCON_SERVER" != "xinternal" ]; then
   kill %11
   # 'killall' seems to work only with the shortened name