diff -u -r ./zaptel/zaptel.c ./astmodules/zaptel/zaptel.c
--- ./zaptel/zaptel.c	Sun Mar  2 22:03:21 2003
+++ ./astmodules/zaptel/zaptel.c	Sun Mar  2 22:05:50 2003
@@ -4325,6 +4325,12 @@
 void zt_rbsbits(struct zt_chan *chan, int cursig)
 {
 	if (cursig == chan->rxsig)
+	{
+	    chan->rxsigtimer=0;
+	    return;
+	}
+	
+	if( chan->rxsigtimer++ < ZT_RXSIGTIME && (chan->txstate == ZT_TXSTATE_RINGON || chan->txstate == ZT_TXSTATE_RINGOFF) )
 		return;
 
 	switch(chan->sig) {
@@ -4370,6 +4376,7 @@
 	}
 	/* Keep track of signalling for next time */
 	chan->rxsig = cursig;
+	chan->rxsigtimer=0;
 }
 
 void zt_ec_chunk(struct zt_chan *ss, unsigned char *rxchunk, const unsigned char *txchunk)
diff -u -r ./zaptel/zaptel.h ./astmodules/zaptel/zaptel.h
--- ./zaptel/zaptel.h	Sun Mar  2 22:03:24 2003
+++ ./astmodules/zaptel/zaptel.h	Sun Mar  2 22:08:51 2003
@@ -756,6 +756,8 @@
 #define	ZT_KEWLTIME 500		/* 500ms for kewl pulse */
 #define	ZT_AFTERKEWLTIME 300    /* 300ms after kewl pulse */
 
+#define	ZT_RXSIGTIME 30		/* 30??(loops) for prevent "autoanswer" */
+
 #define ZT_MAX_SPANS		128		/* Max, 128 spans */
 #define ZT_MAX_CHANNELS		1024	/* Max, 1024 channels */
 #define ZT_MAX_CONF			1024	/* Max, 1024 conferences */
@@ -946,6 +948,7 @@
 	int gotgs;
 	int txstate;
 	int rxsig;
+	int rxsigtimer;
 	int txsig;
 	int rxsigstate;