diff --git a/src/include/private/switch_core_pvt.h b/src/include/private/switch_core_pvt.h
index d50d93dcb7..c88bb51d86 100644
--- a/src/include/private/switch_core_pvt.h
+++ b/src/include/private/switch_core_pvt.h
@@ -186,6 +186,8 @@ struct switch_runtime {
 	char *mailer_app_args;
 	uint32_t max_dtmf_duration;
 	uint32_t default_dtmf_duration;
+	switch_frame_t dummy_cng_frame;
+	char dummy_data[5];
 };
 
 extern struct switch_runtime runtime;
diff --git a/src/switch_core.c b/src/switch_core.c
index 3211245509..3195b7df69 100644
--- a/src/switch_core.c
+++ b/src/switch_core.c
@@ -842,6 +842,11 @@ SWITCH_DECLARE(switch_status_t) switch_core_init(switch_core_flag_t flags, switc
 
 	memset(&runtime, 0, sizeof(runtime));
 
+	runtime.dummy_cng_frame.data = runtime.dummy_data;
+	runtime.dummy_cng_frame.datalen= sizeof(runtime.dummy_data);
+	runtime.dummy_cng_frame.buflen= sizeof(runtime.dummy_data);
+	runtime.dummy_cng_frame.flags = SFF_CNG;
+
 	switch_set_flag((&runtime), SCF_NO_NEW_SESSIONS);
 	runtime.hard_log_level = SWITCH_LOG_DEBUG;
 	runtime.mailer_app = "sendmail";
diff --git a/src/switch_core_io.c b/src/switch_core_io.c
index c4dcf776ab..a2a63bf5bf 100644
--- a/src/switch_core_io.c
+++ b/src/switch_core_io.c
@@ -462,6 +462,10 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_read_frame(switch_core_sessi
 
  even_more_done:
 
+	if (!*frame) {
+		*frame = &runtime.dummy_cng_frame;
+	}
+
 	return status;
 }