diff --git zaptel.h zaptel.h

index f196799..09d2764 100644

--- zaptel.h

+++ zaptel.h

@@ -295,6 +295,14 @@ typedef struct zt_dynamic_span {

 	int spanno;		/* Span number (filled in by zaptel) */

 } ZT_DYNAMIC_SPAN;

+struct zt_ec_data

+{

+	int channo; /* only matters for ioctl */

+	int N_d;

+	int a_i[256];

+	short a_s[256];

+};

+

 /* Define the max # of outgoing DTMF or MFv1 digits to queue in-kernel */

 #define ZT_MAX_DTMF_BUF 256

@@ -666,6 +674,9 @@ struct zt_versioninfo {

 #define ZT_STARTUP		_IOW (ZT_CODE, 99, int)

 #define ZT_SHUTDOWN		_IOW (ZT_CODE, 100, int)

+#define ZT_EC_DUMP		_IOR (ZT_CODE, 101, struct zt_ec_data)

+#define ZT_EC_PRELOAD		_IOW (ZT_CODE, 102, struct zt_ec_data)

+

 #define ZT_TONE_ZONE_MAX		128

 #define ZT_TONE_ZONE_DEFAULT 	-1	/* To restore default */