Index: zaptel.c
===================================================================
--- zaptel.c	(revision 1253)
+++ zaptel.c	(working copy)
@@ -2937,6 +2937,9 @@
 					(chan->rxhooksig != ZT_RXSIG_INITIAL));
 			}
 		} else stack.param.rxisoffhook = 0;
+		if ((chan->txstate == ZT_TXSTATE_KEWL) ||
+		    (chan->txstate == ZT_TXSTATE_AFTERKEWL))
+			stack.param.rxisoffhook = 1;
 		if (chan->span && chan->span->rbsbits && !(chan->sig & ZT_SIG_CLEAR)) {
 			stack.param.rxbits = chan->rxsig;
 			stack.param.txbits = chan->txsig;