diff --git a/src/mod/endpoints/mod_gsmopen/gsmopen.h b/src/mod/endpoints/mod_gsmopen/gsmopen.h
index e2e4b0f15b..557ab640c9 100644
--- a/src/mod/endpoints/mod_gsmopen/gsmopen.h
+++ b/src/mod/endpoints/mod_gsmopen/gsmopen.h
@@ -585,8 +585,8 @@ int gsmopen_serial_sync_AT(private_t * tech_pvt);
 int gsmopen_serial_config(private_t * tech_pvt);
 int gsmopen_serial_config_AT(private_t * tech_pvt);
 
-#define gsmopen_serial_write_AT_expect(P, D, S) gsmopen_serial_write_AT_expect1(P, D, S, 1, 2)
-#define gsmopen_serial_write_AT_expect_noexpcr(P, D, S) gsmopen_serial_write_AT_expect1(P, D, S, 0, 2)
+#define gsmopen_serial_write_AT_expect(P, D, S) gsmopen_serial_write_AT_expect1(P, D, S, 1, 0)
+#define gsmopen_serial_write_AT_expect_noexpcr(P, D, S) gsmopen_serial_write_AT_expect1(P, D, S, 0, 0)
 #define gsmopen_serial_write_AT_expect_noexpcr_tout(P, D, S, T) gsmopen_serial_write_AT_expect1(P, D, S, 0, T)
 // 20.5 sec timeout, used for querying the SIM and sending SMSs
 #define gsmopen_serial_write_AT_expect_longtime(P, D, S) gsmopen_serial_write_AT_expect1(P, D, S, 1, 20)
diff --git a/src/mod/endpoints/mod_gsmopen/gsmopen_protocol.cpp b/src/mod/endpoints/mod_gsmopen/gsmopen_protocol.cpp
index 2acb275c04..98a60babbf 100644
--- a/src/mod/endpoints/mod_gsmopen/gsmopen_protocol.cpp
+++ b/src/mod/endpoints/mod_gsmopen/gsmopen_protocol.cpp
@@ -1994,7 +1994,7 @@ int gsmopen_serial_write_AT_expect1(private_t * tech_pvt, const char *data, cons
 		return -1;
 	}
 
-	at_result = gsmopen_serial_read_AT(tech_pvt, 1, 500000, seconds, expected_string, expect_crlf);	// 20.5 sec timeout, used for querying the SIM and sending SMSs
+	at_result = gsmopen_serial_read_AT(tech_pvt, 1, 100000, seconds, expected_string, expect_crlf);	// minimum 1/10th sec timeout
 	UNLOCKA(tech_pvt->controldev_lock);
 	POPPA_UNLOCKA(tech_pvt->controldev_lock);
 
@@ -2011,7 +2011,8 @@ int gsmopen_serial_AT_expect(private_t * tech_pvt, const char *expected_string,
 	if (option_debug > 1)
 		DEBUGA_GSMOPEN("expecting: %s\n", GSMOPEN_P_LOG, expected_string);
 
-	at_result = gsmopen_serial_read_AT(tech_pvt, 1, 500000, seconds, expected_string, expect_crlf);	// 20.5 sec timeout, used for querying the SIM and sending SMSs
+	//cicopet at_result = gsmopen_serial_read_AT(tech_pvt, 1, 500000, seconds, expected_string, expect_crlf);	// 20.5 sec timeout, used for querying the SIM and sending SMSs
+	at_result = gsmopen_serial_read_AT(tech_pvt, 1, 100000, seconds, expected_string, expect_crlf);	//  minimum 1/10th sec timeout
 	UNLOCKA(tech_pvt->controldev_lock);
 	POPPA_UNLOCKA(tech_pvt->controldev_lock);