# Telem2 lost after upgrade firmware 1.9.2

**URL:** <https://discuss.px4.io/t/telem2-lost-after-upgrade-firmware-1-9-2/12328>\
**Category:** Pixhawk\
**Created:** [August 6, 2019, 9:07pm UTC](https://discuss.px4.io/t/telem2-lost-after-upgrade-firmware-1-9-2/12328 "2019-08-06T21:07:28Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Serge](https://discuss.px4.io/user_avatar/discuss.px4.io/serge/32/2268_2.png) [@Serge](https://discuss.px4.io/u/Serge)\
**Post date:** [August 6, 2019, 9:07pm UTC](https://discuss.px4.io/t/telem2-lost-after-upgrade-firmware-1-9-2/12328/1 "2019-08-06T21:07:28Z")

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Before the last software update (1.9.2) I used two outputs TELEM1 and TELEM2 to send/recieved MAVLINK datas. With TELEM1 toward RadioLink AT10II and a telemetry module PRM-O3. With TELEM2 toward a SIK RADIO radio modem to QGroundControl (Android or Windows).After the update, I lost TELEM2. I can not set TELEM2. Studying the documentation PX4, it seems me that it is possible to configure a second session MAVLINK on TELEM2 with the parameters MAV\_1 \_ …, But I can not find the parameters MAV\_1\_FORWARD, MAV\_1\_MODE, MAV\_1\_RATE on QGC.To avoid the problem, I use only TELEM1 with MAV\_0 but it seems to me that it is a functional regression of this version.Can you help me ?