diff --git a/libvoice-airoha/files/etc/uci-defaults/991-libvoice-airoha b/libvoice-airoha/files/etc/uci-defaults/991-libvoice-airoha
index 68c931340..d09f7824c 100644
--- a/libvoice-airoha/files/etc/uci-defaults/991-libvoice-airoha
+++ b/libvoice-airoha/files/etc/uci-defaults/991-libvoice-airoha
@@ -1,16 +1,25 @@
 #!/bin/sh
 
 hasVoice=$(db -q get hw.board.hasVoice)
-
 [ "$hasVoice" = "1" ] || exit 0
 
-SLIC=`cat /proc/device-tree/airoha-voice/slic-type`
-[ "${SLIC#pef}" != "${SLIC}" ] || exit 0
+SLIC=$(cat /proc/device-tree/airoha-voice/slic-type)
+[ "${SLIC#pef}" != "${SLIC}" ] && {
+    echo Configure TxGain and RxGain for MXL SLIC $SLIC
 
-echo Configure TxGain and RxGain for MXL SLIC $SLIC
+    ports=$(db -q get hw.board.VoicePorts)
+    for p in $(seq 0 $((ports-1))); do
+        uci set asterisk.extension${p}.txgain='10'
+        uci set asterisk.extension${p}.rxgain='-15'
+    done
+}
 
-ports=$(db -q get hw.board.VoicePorts)
-for p in $(seq 0 $((ports-1))); do
-    uci set asterisk.extension${p}.txgain='10'
-    uci set asterisk.extension${p}.rxgain='-15'
-done
+hasDect=$(db -q get hw.board.hasDect)
+[ "$hasDect" = "1" ] || exit 0
+
+# configure the PCM for DECT/DCX81
+[ -f "/proc/device-tree/aliases/dcx81-uart" ] && {
+    uci set dect.global.pcm_fsync='SHORT_LF'
+    uci set dect.global.pcm_slot_start='8'
+    uci set dect.global.dect_channel_start='3'
+}