diff --git a/src/mod/applications/mod_spandsp/mod_spandsp_modem.c b/src/mod/applications/mod_spandsp/mod_spandsp_modem.c
index 8e1c925..a5f77a8 100644
--- a/src/mod/applications/mod_spandsp/mod_spandsp_modem.c
+++ b/src/mod/applications/mod_spandsp/mod_spandsp_modem.c
@@ -864,6 +864,9 @@ static switch_call_cause_t channel_outgoing_channel(switch_core_session_t *sessi
 			modem_id = atoi(modem_id_string);
 		}
 
+        switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(*new_session), SWITCH_LOG_ERROR, "use modem %d\n", modem_id);
+
+
 		if (!(modem = acquire_modem(modem_id))) {
 			switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(*new_session), SWITCH_LOG_ERROR, "Cannot find a modem.\n");
 			cause = SWITCH_CAUSE_USER_BUSY; goto fail;
@@ -1400,14 +1403,21 @@ static modem_t *acquire_modem(int index)
 	int64_t idle_debounce = 2000000;
 
 	switch_mutex_lock(globals.mutex);
+
+    switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "look for modem %d\n", index);
+
+
 	if (index > -1 && index < globals.SOFT_MAX_MODEMS) {
 		modem = &globals.MODEM_POOL[index];
+        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "found modem %d %p %s:%s\n", index, (void *) modem, modem->devlink, modem->stty);
 	} else {
 		int x;
 
 		for(x = 0; x < globals.SOFT_MAX_MODEMS; x++) {
+            switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "search for index %d\n", x);
 			if (globals.MODEM_POOL[x].state == MODEM_STATE_ONHOOK && (now - globals.MODEM_POOL[x].last_event) > idle_debounce) {
 				modem = &globals.MODEM_POOL[x];
+                switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "auto found modem %d %p %s:%s\n", x, (void *) modem, modem->devlink, modem->stty);
 				break;
 			}
 		}