From b3543499f07f48f74c468b81a7091acdeed5f373 Mon Sep 17 00:00:00 2001
From: Mark Spencer <markster@digium.com>
Date: Wed, 23 Apr 2003 23:00:29 +0000
Subject: [PATCH] Switch to audio mode when enabling echo cancellation

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@899 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 channels/chan_zap.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index 0c1cbaf248..8932f0a4c0 100755
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -907,6 +907,12 @@ static void zt_enable_ec(struct zt_pvt *p)
 		return;
 	}
 	if (p && p->echocancel) {
+		if (p->sig == SIG_PRI) {
+			x = 1;
+			res = ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &x);
+			if (res)
+				ast_log(LOG_WARNING, "Unable to enable echo cancellation on channel %d\n", p->channel);
+		}
 		x = p->echocancel;
 		res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOCANCEL, &x);
 		if (res)