Index: zaptel.c
===================================================================
RCS file: /usr/cvsroot/zaptel/zaptel.c,v
retrieving revision 1.115
diff -u -r1.115 zaptel.c
--- zaptel.c	8 Sep 2005 17:22:39 -0000	1.115
+++ zaptel.c	11 Sep 2005 05:02:39 -0000
@@ -4969,11 +4969,20 @@
 				*(txb++) = fasthdlc_tx_run_nocheck(&ms->txhdlc);
 			}
 			bytes = 0;
+#if 0
+	/* SLD: We don't need to and in fact mustn't do this.
+	If we rather just pass along to the "silence" code below,
+	then we get a proper silence whether alaw or ulaw.
+	To further help you relax: ulaw coding for silence is 0xff anyway,
+	so for ulaw channels the behaviour remains the same anyway.
+	But with this code included, we send 0xff on alaw channels when
+	nothing else is being sent, and 0xff is NOT silence for alaw */
 		} else if (ms->flags & ZT_FLAG_CLEAR) {
 			/* Clear channels should idle with 0xff for the sake
 			of silly PRI's that care about idle B channels */
 			memset(txb, 0xff, bytes);
 			bytes = 0;
+#endif
 		} else {
 			memset(txb, ZT_LIN2X(0, ms), bytes);	/* Lastly we use silence on telephony channels */
 			bytes = 0;