diff --git a/channels/chan_pjsip.c b/channels/chan_pjsip.c
index 7c6b301080..a759117ce0 100644
--- a/channels/chan_pjsip.c
+++ b/channels/chan_pjsip.c
@@ -1183,10 +1183,14 @@ static int chan_pjsip_devicestate(const char *data)
 		return AST_DEVICE_INVALID;
 	}
 
-	if (endpoint_snapshot->state == AST_ENDPOINT_OFFLINE) {
-		state = AST_DEVICE_UNAVAILABLE;
-	} else if (endpoint_snapshot->state == AST_ENDPOINT_ONLINE) {
-		state = AST_DEVICE_NOT_INUSE;
+	if (ast_sip_get_rtstatic()) {
+		state = AST_DEVICE_UNKNOWN;
+	} else {
+		if (endpoint_snapshot->state == AST_ENDPOINT_OFFLINE) {
+			state = AST_DEVICE_UNAVAILABLE;
+		} else if (endpoint_snapshot->state == AST_ENDPOINT_ONLINE) {
+			state = AST_DEVICE_NOT_INUSE;
+		}
 	}
 
 	if (!endpoint_snapshot->num_channels) {
diff --git a/res/res_pjsip/config_global.c b/res/res_pjsip/config_global.c
index 4620c3f544..8d31f9cef4 100644
--- a/res/res_pjsip/config_global.c
+++ b/res/res_pjsip/config_global.c
@@ -54,6 +54,7 @@
 #define DEFAULT_SEND_CONTACT_STATUS_ON_UPDATE_REGISTRATION 0
 #define DEFAULT_TASKPROCESSOR_OVERLOAD_TRIGGER TASKPROCESSOR_OVERLOAD_TRIGGER_GLOBAL
 #define DEFAULT_NOREFERSUB 1
+#define DEFAULT_RTSTATIC 0
 
 /*!
  * \brief Cached global config object
@@ -119,6 +120,8 @@ struct global_config {
 	enum ast_sip_taskprocessor_overload_trigger overload_trigger;
 	/*! Nonzero if norefersub is to be sent in Supported header */
 	unsigned int norefersub;
+	/*! If enabled will return AST_DEVICE_UNKNOWN for all endpoints */
+	unsigned int rtstatic;
 };
 
 static void global_destructor(void *obj)
@@ -537,6 +540,21 @@ unsigned int ast_sip_get_norefersub(void)
 	return norefersub;
 }
 
+unsigned int ast_sip_get_rtstatic(void)
+{
+	unsigned int rtstatic;
+	struct global_config *cfg;
+
+	cfg = get_global_cfg();
+	if (!cfg) {
+		return DEFAULT_RTSTATIC;
+	}
+
+	rtstatic = cfg->rtstatic;
+	ao2_ref(cfg, -1);
+	return rtstatic;
+}
+
 static int overload_trigger_handler(const struct aco_option *opt,
 	struct ast_variable *var, void *obj)
 {
@@ -744,6 +762,9 @@ int ast_sip_initialize_sorcery_global(void)
 	ast_sorcery_object_field_register(sorcery, "global", "norefersub",
 		DEFAULT_NOREFERSUB ? "yes" : "no",
 		OPT_YESNO_T, 1, FLDSET(struct global_config, norefersub));
+	ast_sorcery_object_field_register(sorcery, "global", "rtstatic",
+		DEFAULT_RTSTATIC ? "yes" : "no",
+		OPT_YESNO_T, 1, FLDSET(struct global_config, rtstatic));
 
 	if (ast_sorcery_instance_observer_add(sorcery, &observer_callbacks_global)) {
 		return -1;