diff -burN /7/asterisk/channels/chan_zap.c asterisk/channels/chan_zap.c
--- /7/asterisk/channels/chan_zap.c	2006-05-08 18:23:13.000000000 +1000
+++ asterisk/channels/chan_zap.c	2006-05-08 21:46:15.000000000 +1000
@@ -8586,6 +8586,12 @@
 									ast_verbose(VERBOSE_PREFIX_3 "Accepting call from '%s' to '%s' on channel %d/%d, span %d\n",
 										plancallingnum, pri->pvts[chanpos]->exten, 
 											pri->pvts[chanpos]->logicalspan, pri->pvts[chanpos]->prioffset, pri->span);
+								/* Lookup asterisk internal db if we need to disable EC for incoming DID */
+								char tmp_db_ec_check[100];
+								if (!ast_db_get("EC/Disable", pri->pvts[chanpos]->exten, tmp_db_ec_check, sizeof(tmp_db_ec_check))){
+									if( tmp_db_ec_check && ( strcasecmp( tmp_db_ec_check, "1" ) != 0 ) )
+										zt_enable_ec(pri->pvts[chanpos]);
+								} else
 								zt_enable_ec(pri->pvts[chanpos]);
 							} else {
 								ast_log(LOG_WARNING, "Unable to start PBX on channel %d/%d, span %d\n",