--- wctdm.c.svn	2009-02-01 09:04:29.000000000 +1300
+++ wctdm.c	2009-02-06 23:32:29.000000000 +1300
@@ -1057,14 +1057,21 @@ DAHDI_IRQ_HANDLER(wctdm_interrupt)
 				wc->mod[x].fxs.idletxhookstate = POLARITY_XOR(x) ? 0x6 : 0x2;/* OHT mode when idle */
 			} else {
 				if (wc->mod[x].fxs.ohttimer) {
-					wc->mod[x].fxs.ohttimer-= DAHDI_CHUNKSIZE;
-					if (!wc->mod[x].fxs.ohttimer) {
-						wc->mod[x].fxs.idletxhookstate = POLARITY_XOR(x) ? 0x5 : 0x1; /* Switch to Active : Reverse Forward */
-						if ((wc->mod[x].fxs.lasttxhook == 0x2) || (wc->mod[x].fxs.lasttxhook == 0x6)) {
-							/* Apply the change if appropriate */
-							wc->mod[x].fxs.lasttxhook = POLARITY_XOR(x) ? 0x5 : 0x1;
-							wctdm_setreg(wc, x, 64, wc->mod[x].fxs.lasttxhook);
+					if (!wc->mod[x].fxs.oldrxhook) {
+						/* OnHook */
+						wc->mod[x].fxs.ohttimer-= DAHDI_CHUNKSIZE;
+						if (!wc->mod[x].fxs.ohttimer) {
+							wc->mod[x].fxs.idletxhookstate = POLARITY_XOR(x) ? 0x5 : 0x1; /* Switch to Active : Reverse Forward */
+							if ((wc->mod[x].fxs.lasttxhook == 0x2) || (wc->mod[x].fxs.lasttxhook == 0x6)) {
+								/* Apply the change if appropriate */
+								wc->mod[x].fxs.lasttxhook = POLARITY_XOR(x) ? 0x5 : 0x1;
+								wctdm_setreg(wc, x, 64, wc->mod[x].fxs.lasttxhook);
+							}
 						}
+					} else {
+						/* Off Hook */
+						wc->mod[x].fxs.ohttimer = 0;
+						wc->mod[x].fxs.idletxhookstate = POLARITY_XOR(x) ? 0x5 : 0x1; /* Switch to Active : Reverse Forward */
 					}
 				}
 			}