Someone

--- spandsp-0.0.3/src/t31.c     2006-09-05 19:00:14.000000000 -0700
+++ spandsp/src/t31.c   2006-09-06 17:42:00.379750416 -0700
@@ -314,7 +314,7 @@

 int t31_t38_send_timeout(t31_state_t *s, int samples)
 {
-    int len;
+    int len = 0;
     uint8_t buf[100];
     /* Training times for all the modem options, with and without TEP */
     static const int training_time[] =
@@ -1368,12 +1368,10 @@

     /* Searching for a specified minimum period of silence. */
     s = (t31_state_t *) user_data;
-    if (s->silence_heard >= s->silence_awaited)
+    if (s->silence_awaited  &&  s->silence_heard >= s->silence_awaited)
     {
         at_put_response_code(&s->at_state, AT_RESPONSE_CODE_OK);
         t31_set_at_rx_mode(s, AT_MODE_OFFHOOK_COMMAND);
-        s->rx_handler = dummy_rx;
-        s->rx_user_data = NULL;
         s->silence_heard = 0;
         s->silence_awaited = 0;
     }