diff --git a/applications/apertif/commissioning/central_commands.sh b/applications/apertif/commissioning/central_commands.sh
index 609bab91f56fd52700275417632da78bd7eba3ff..5ed5daedb5e5a2436135ce28b14e60699712d189 100755
--- a/applications/apertif/commissioning/central_commands.sh
+++ b/applications/apertif/commissioning/central_commands.sh
@@ -241,6 +241,11 @@ done
 #    python $UPE/peripherals/util_dp_bsn_aligner.py --unb 5 --bn 2 -r 0 -n 2 -s INPUT
 #fi
 
+# This receiver @ XC unb 5 gets no packets. BSN monitors on RT8 look good; optical link issue? Date: 29 June 2017.
+if [ $(echo $UNBS | grep -c 5) == '1' ]; then
+    python $UPE/peripherals/util_dp_bsn_aligner.py --unb 5 --bn 2 -r 0 -n 2 -s INPUT
+fi
+
 # This receiver @ XC unb 0 sees bursts of CRC errors now and then. Undiagnosed. Optics replaced on both sides 17 may 2017.
 #if [ $(echo $UNBS | grep -c 0) == '1' ]; then
 #    python $UPE/peripherals/util_dp_bsn_aligner.py --unb 0 --bn 0 -r 0 -n 2 -s INPUT