diff --git a/conf/vanilla/autoload_configs/spandsp.conf.xml b/conf/vanilla/autoload_configs/spandsp.conf.xml
index 2653c40bb8..2471ca52ce 100644
--- a/conf/vanilla/autoload_configs/spandsp.conf.xml
+++ b/conf/vanilla/autoload_configs/spandsp.conf.xml
@@ -34,6 +34,9 @@
 
 	<param name="spool-dir"		value="$${temp_dir}"/>
 	<param name="file-prefix"	value="faxrx"/>
+	<!-- How many packets to process before sending the re-invite on tx/rx -->
+	<!-- <param name="t38-rx-reinvite-packet-count" value="50"/> -->
+	<!-- <param name="t38-tx-reinvite-packet-count" value="100"/> -->
     </fax-settings>
 
     <descriptors>
diff --git a/src/mod/applications/mod_spandsp/mod_spandsp.c b/src/mod/applications/mod_spandsp/mod_spandsp.c
index 4d70f04b1b..1158026215 100644
--- a/src/mod/applications/mod_spandsp/mod_spandsp.c
+++ b/src/mod/applications/mod_spandsp/mod_spandsp.c
@@ -519,6 +519,8 @@ switch_status_t load_configuration(switch_bool_t reload)
 	spandsp_globals.header = "SpanDSP Fax Header";
 	spandsp_globals.timezone = "";
 	spandsp_globals.tonedebug = 0;
+	spandsp_globals.t38_tx_reinvite_packet_count = 100;
+	spandsp_globals.t38_rx_reinvite_packet_count = 50;
 
 	if ((xml = switch_xml_open_cfg("spandsp.conf", &cfg, NULL)) || (xml = switch_xml_open_cfg("fax.conf", &cfg, NULL))) {
 		status = SWITCH_STATUS_SUCCESS;
@@ -627,6 +629,22 @@ switch_status_t load_configuration(switch_bool_t reload)
 					} else {
 						spandsp_globals.enable_t38_request = 0;
 					}
+				} else if (!strcmp(name, "t38-tx-reinvite-packet-count")) {
+                    int delay = atoi(value);
+
+                    if (delay >= 0 && delay < 1000) {
+						spandsp_globals.t38_tx_reinvite_packet_count = delay;
+					} else {
+						spandsp_globals.t38_tx_reinvite_packet_count = 100;
+					}
+				} else if (!strcmp(name, "t38-rx-reinvite-packet-count")) {
+                    int delay = atoi(value);
+
+					if (delay >= 0 && delay < 1000) {
+						spandsp_globals.t38_rx_reinvite_packet_count = delay;
+					} else {
+						spandsp_globals.t38_rx_reinvite_packet_count = 0;
+					}
 				} else if (!strcmp(name, "ident")) {
                     if (!strcmp(value, "_undef_")) {
                         spandsp_globals.ident = "";
diff --git a/src/mod/applications/mod_spandsp/mod_spandsp.h b/src/mod/applications/mod_spandsp/mod_spandsp.h
index c732c7b357..7f2f5d04a3 100644
--- a/src/mod/applications/mod_spandsp/mod_spandsp.h
+++ b/src/mod/applications/mod_spandsp/mod_spandsp.h
@@ -82,6 +82,8 @@ struct spandsp_globals {
 	char *modem_directory;
 	switch_hash_t *tones;
 	int tonedebug;
+    int t38_tx_reinvite_packet_count;
+    int t38_rx_reinvite_packet_count;
 };
 
 extern struct spandsp_globals spandsp_globals;
diff --git a/src/mod/applications/mod_spandsp/mod_spandsp_fax.c b/src/mod/applications/mod_spandsp/mod_spandsp_fax.c
index 2c0ba42cc1..5a3eb61214 100644
--- a/src/mod/applications/mod_spandsp/mod_spandsp_fax.c
+++ b/src/mod/applications/mod_spandsp/mod_spandsp_fax.c
@@ -1483,9 +1483,9 @@ void mod_spandsp_fax_process_fax(switch_core_session_t *session, const char *dat
 	switch_ivr_sleep(session, 250, SWITCH_TRUE, NULL);
 
 	if (pvt->app_mode == FUNCTION_TX) {
-		req_counter = 100;
+		req_counter = spandsp_globals.t38_tx_reinvite_packet_count;
 	} else {
-		req_counter = 50;
+		req_counter = spandsp_globals.t38_rx_reinvite_packet_count;
 	}
 
 	while (switch_channel_ready(channel)) {