Index: channels/chan_zap.c
===================================================================
--- channels/chan_zap.c (revision 2232)
+++ channels/chan_zap.c (working copy)
@@ -10039,7 +10039,7 @@
                                y = atoi(v->value);
                        } else
                                y = 0;
-                       if ((y == 32) || (y == 64) || (y == 128) || (y == 256))
+                       if ((y == 32) || (y == 64) || (y == 128) || (y == 256) || (y == 512) || (y == 1024))
                                echocancel = y;
                        else {
                                echocancel = opbx_true(v->value);