diff --git a/channels/chan_usbradio.c b/channels/chan_usbradio.c
index c507da1..4403f39 100644
--- a/channels/chan_usbradio.c
+++ b/channels/chan_usbradio.c
@@ -261,6 +261,7 @@ struct chan_usbradio_pvt {
 	int rxdemod;
 	float rxgain;
 	int rxcdtype;
+	int voxhangtime;			/* if rxcdtype=vox, ms to wait detecting RX audio before setting CD=0 */
 	int rxsdtype;
 	int rxsquelchadj;			/* this copy needs to be here for initialization */
 	int rxsqhyst;
@@ -423,6 +424,7 @@ static struct chan_usbradio_pvt usbradio_default = {
 	.usedtmf = 1,
 	.rxondelay = 0,
 	.txoffdelay = 0,
+	.voxhangtime = 2000,
 	.area = 0,
 	.rptnum = 0,
 	.clipledgpio = 0,
@@ -1057,6 +1059,7 @@ static void *hidthread(void *arg)
 
 			tChan.rxDemod = o->rxdemod;
 			tChan.rxCdType = o->rxcdtype;
+			tChan.voxHangTime = o->voxhangtime;
 			tChan.rxSqVoxAdj = o->rxsqvoxadj;
 
 			if (o->txlimonly) {
@@ -4712,6 +4715,9 @@ static void pmrdump(struct chan_usbradio_pvt *o)
 
 	pd(o->rxdemod);
 	pd(o->rxcdtype);
+	if (o->rxcdtype == CD_XPMR_VOX) {
+		pd(o->voxhangtime);
+	}
 	pd(o->rxsdtype);
 	pd(o->txtoctype);
 
@@ -4932,6 +4938,7 @@ static struct chan_usbradio_pvt *store_config(const struct ast_config *cfg, cons
 		CV_F("txmixa", store_txmixa(o, (char *) v->value));
 		CV_F("txmixb", store_txmixb(o, (char *) v->value));
 		CV_F("carrierfrom", store_rxcdtype(o, (char *) v->value));
+		CV_UINT("voxhangtime", o->voxhangtime);
 		CV_F("ctcssfrom", store_rxsdtype(o, (char *) v->value));
 		CV_UINT("rxsqvox", o->rxsqvoxadj);
 		CV_UINT("rxsqhyst", o->rxsqhyst);
@@ -5068,6 +5075,7 @@ static struct chan_usbradio_pvt *store_config(const struct ast_config *cfg, cons
 
 		tChan.rxDemod = o->rxdemod;
 		tChan.rxCdType = o->rxcdtype;
+		tChan.voxHangTime = o->voxhangtime;
 		tChan.rxCarrierHyst = o->rxsqhyst;
 		tChan.rxSqVoxAdj = o->rxsqvoxadj;
 		tChan.rxSquelchDelay = o->rxsquelchdelay;
diff --git a/channels/xpmr/xpmr.c b/channels/xpmr/xpmr.c
index 5bf7bba..d446f00 100644
--- a/channels/xpmr/xpmr.c
+++ b/channels/xpmr/xpmr.c
@@ -1716,6 +1716,7 @@ t_pmr_chan	*createPmrChannel(t_pmr_chan *tChan, i16 numSamples)
 	{
 		pChan->rxDemod=tChan->rxDemod;
 		pChan->rxCdType=tChan->rxCdType;
+		pChan->voxHangTime=tChan->voxHangTime;
 		pChan->rxSquelchPoint = tChan->rxSquelchPoint;
 		pChan->rxCarrierHyst = tChan->rxCarrierHyst;
 		pChan->rxSqVoxAdj=tChan->rxSqVoxAdj;
@@ -2756,13 +2757,11 @@ i16 PmrRx(t_pmr_chan *pChan, i16 *input, i16 *outputrx, i16 *outputtx)
 		//pmr_sps=NULL;	// sph maw
 	}
 
-	#define XPMR_VOX_HANGTIME	2000
-
 	if(pChan->rxCdType==CD_XPMR_VOX)
 	{
 		if(pChan->spsRxVox->compOut)
 		{
-			pChan->rxVoxTimer=XPMR_VOX_HANGTIME;    //VOX HangTime in ms
+			pChan->rxVoxTimer=pChan->voxHangTime;	/* VOX HangTime in ms */
 		}
 		if(pChan->rxVoxTimer>0)
 		{
diff --git a/channels/xpmr/xpmr.h b/channels/xpmr/xpmr.h
index 498ae1c..538d697 100644
--- a/channels/xpmr/xpmr.h
+++ b/channels/xpmr/xpmr.h
@@ -615,6 +615,7 @@ typedef struct	t_pmr_chan
 	i16 rxQuality;			// signal quality metric
 	i16 rxCarrierDetect;    // carrier detect
 	i16 rxCdType;
+	i16 voxHangTime;		// if rxCdType=CD_XPMR_VOX, time to wait for RX audio before setting CD=0
 	i16 rxSqVoxAdj;
 	i16 rxExtCarrierDetect; 
 	i32 inputBlanking;  	// Tx pulse eliminator
diff --git a/configs/rpt/usbradio.conf b/configs/rpt/usbradio.conf
index c5609da..a5d708a 100644
--- a/configs/rpt/usbradio.conf
+++ b/configs/rpt/usbradio.conf
@@ -83,6 +83,10 @@ carrierfrom = dsp           ; no,usb,usbinvert,dsp,vox
                             ; pp - from parallel port (Active high)
                             ; ppinvert - from the inverted parallel port (Active low)
 
+voxhangtime = 2000          ; If carrierfrom=vox, mS to wait detecting RX audio before setting rxcarrierdetect=0
+                            ; 2000 is the default but results in 2 seconds of silence added after RX unkey.
+                            ; 500 seems more optimal. Lower values may result in unintended drops in RX CD.
+
 ctcssfrom = dsp             ; no,usb,usbinvert,dsp
                             ; no - no CTCSS decoding, system will be carrier squelch
                             ; usb - from the CTCSS line on the USB sound fob (Active high)
diff --git a/configs/samples/usbradio.conf.sample b/configs/samples/usbradio.conf.sample
index 7961066..eaaccba 100644
--- a/configs/samples/usbradio.conf.sample
+++ b/configs/samples/usbradio.conf.sample
@@ -69,6 +69,10 @@
                             ; pp - from parallel port (Active high)
                             ; ppinvert - from the inverted parallel port (Active low)
 
+voxhangtime = 2000          ; If carrierfrom=vox, mS to wait detecting RX audio before setting rxcarrierdetect=0
+                            ; 2000 is the default but results in 2 seconds of silence added after RX unkey.
+                            ; 500 seems more optimal. Lower values may result in unintended drops in RX CD.
+
 ;ctcssfrom = dsp            ; no,usb,usbinvert,dsp
                             ; no - no CTCSS decoding, system will be carrier squelch
                             ; usb - from the CTCSS line on the USB sound fob (Active high)