diff --git a/phoned/main.c b/phoned/main.c
index 859b9c7..e4c9a5b 100644
--- a/phoned/main.c
+++ b/phoned/main.c
@@ -49,6 +49,7 @@ int main(argc, argv)
 				usage(strdup(*argv));
 				return -2;
 		}
+	cf.modem_tm = 0;
 	cf.loglevels = LL_ALL;
 	pthread_mutex_unlock(&cfmx);
 	initialize();
diff --git a/phoned/modem.c b/phoned/modem.c
index b18110a..fba0a99 100644
--- a/phoned/modem.c
+++ b/phoned/modem.c
@@ -53,9 +53,11 @@ int modemfd;
 unsigned int cou = 0;
 char buffer[512];
 short doing_cid = 0;
+extern struct conf cf;
 pthread_t modemth;
 pthread_mutex_t modemmx = PTHREAD_MUTEX_INITIALIZER;
 pthread_mutex_t buffermx = PTHREAD_MUTEX_INITIALIZER;
+extern pthread_mutex_t cfmx;
 void stmod(const char* str)
 {
 	pthread_mutex_lock(&modemmx);
@@ -174,15 +176,19 @@ void *modem_io(k)
 	fd_set	fds;
 	struct timeval tv;
 	char	cbuf[1];
+	short dotm = 0;
 	k = 0;
 	*cbuf = '\0'; cbuf[1] = '\0';
 	pthread_mutex_lock(&modemmx);
 	for(;;) {
+		pthread_mutex_lock(&cfmx);
+		dotm = cf.modem_tm;
+		pthread_mutex_unlock(&cfmx);
 		FD_ZERO(&fds);
 		FD_SET(modemfd, &fds);
 		tv.tv_sec = 2; /* tunable */
 		tv.tv_usec = 0;
-		switch(select(modemfd + 1, &fds, NULL, NULL, &tv)) {
+		switch(select(modemfd + 1, &fds, NULL, NULL, dotm ? &tv : NULL)) {
 			case -1:
 				lprintf(error, "select on modem: %s", strerror(errno));
 				pthread_mutex_unlock(&modemmx);