From aae58d5a683223658e2a55c0e32f32fd3a9b2fe7 Mon Sep 17 00:00:00 2001
From: Andreas Eversberg <jolly@eversberg.eu>
Date: Thu, 5 May 2016 13:11:15 +0200
Subject: A-Netz: Calibration of tone levels on TX and RX side

---
 src/anetz/anetz.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'src/anetz/anetz.c')

diff --git a/src/anetz/anetz.c b/src/anetz/anetz.c
index f41a5ce..8c1384a 100644
--- a/src/anetz/anetz.c
+++ b/src/anetz/anetz.c
@@ -248,9 +248,13 @@ void anetz_receive_tone(anetz_t *anetz, int tone)
 	else
 		PDEBUG(DANETZ, DEBUG_DEBUG, "Continuous tone is gone.\n");
 
-	if (anetz->sender.loopback) {
+	/* skip any handling in loopback mode */
+	if (anetz->sender.loopback)
+		return;
+
+	/* skip tone 2280 Hz, because it is not relevant for base station */
+	if (tone == 0)
 		return;
-	}
 
 	switch (anetz->state) {
 	case ANETZ_FREI:
-- 
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