diff --git a/channels/chan_dahdi.c b/channels/chan_dahdi.c
index cdfb867b39..bbb883056f 100644
--- a/channels/chan_dahdi.c
+++ b/channels/chan_dahdi.c
@@ -3105,7 +3105,8 @@ static int dahdi_call(struct ast_channel *ast, char *rdest, int timeout)
 				redirect_reason = 0;
 			else if (!strcasecmp(rr_str, "BUSY"))
 				redirect_reason = 1;
-			else if (!strcasecmp(rr_str, "NO_REPLY"))
+			else if (!strcasecmp(rr_str, "NO_REPLY") || !strcasecmp(rr_str, "NOANSWER"))
+			/* the NOANSWER is to match diversion-reason from chan_sip, (which never reads PRIREDIRECTREASON) */
 				redirect_reason = 2;
 			else if (!strcasecmp(rr_str, "UNCONDITIONAL"))
 				redirect_reason = 15;
diff --git a/channels/chan_h323.c b/channels/chan_h323.c
index b574421841..7600cb8c35 100644
--- a/channels/chan_h323.c
+++ b/channels/chan_h323.c
@@ -626,7 +626,8 @@ static int oh323_call(struct ast_channel *c, char *dest, int timeout)
 			pvt->options.redirect_reason = 0;
 		else if (!strcasecmp(addr, "BUSY"))
 			pvt->options.redirect_reason = 1;
-		else if (!strcasecmp(addr, "NO_REPLY"))
+		else if (!strcasecmp(addr, "NO_REPLY") || !strcasecmp(addr, "NOANSWER"))
+		/* the NOANSWER is to match diversion-reason from chan_sip, (which never reads PRIREDIRECTREASON) */
 			pvt->options.redirect_reason = 2;
 		else if (!strcasecmp(addr, "UNCONDITIONAL"))
 			pvt->options.redirect_reason = 15;