# WP7603 legato 18.5.1 **URL:** \ **Category:** Uncategorized\ **Created:** [July 9, 2018, 5:18am UTC](https://forum.legato.io/t/wp7603-legato-18-5-1/3415 "2018-07-09T05:18:19Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![FrancisDuhaut](https://avatars.discourse-cdn.com/v4/letter/f/f0a364/32.png) [@FrancisDuhaut](https://forum.legato.io/u/FrancisDuhaut)\ **Post date:** [July 9, 2018, 5:18am UTC](https://forum.legato.io/t/wp7603-legato-18-5-1/3415/1 "2018-07-09T05:18:19Z")
Hello I have send from France to USA a mangoh red with WP7603 and legat 18.5.1 I have set WP7603 with Sierra APN. But Ican’t test It in France due to incompatibility with LTE in France. My customer power on the board but I don’t see any connection to AV. In the time line I can see a lot of data session started /stopped with around 3Mbytes of data/day but no registration in AirVantage. ![image](https://us1.discourse-cdn.com/flex019/uploads/legato1/original/1X/7e259d58155224c05c08b97c1d71317abdef77ac.jpeg) I will try to investigate with the customer. Any idea, I have installed a avcController and set the heartbeat manually to 15mn with AT+Wdsc=3,15 before to shipped the board. Thanks Francis ---
**Author:** ![plu](https://avatars.discourse-cdn.com/v4/letter/p/e19b73/32.png) [@plu](https://forum.legato.io/u/plu)\ **Post date:** [July 23, 2018, 3:07pm UTC](https://forum.legato.io/t/wp7603-legato-18-5-1/3415/2 "2018-07-23T15:07:02Z")
Hi Francis, is your picture extracted from Airvantage platform? how do you control that the registration is not done on airvantage for your devices? do you have any other information from the device or access to the remote device? what could be useful, is to control directly on the remote device the connection and the registration, may be by checking legato logs . ---
**Author:** ![FrancisDuhaut](https://avatars.discourse-cdn.com/v4/letter/f/f0a364/32.png) [@FrancisDuhaut](https://forum.legato.io/u/FrancisDuhaut)\ **Post date:** [July 23, 2018, 4:37pm UTC](https://forum.legato.io/t/wp7603-legato-18-5-1/3415/3 "2018-07-23T16:37:33Z")
Hello Connection is good. The issues was a very bad level for the radio. Thanks Francis ---
**Author:** ![plu](https://avatars.discourse-cdn.com/v4/letter/p/e19b73/32.png) [@plu](https://forum.legato.io/u/plu)\ **Post date:** [July 26, 2018, 7:06am UTC](https://forum.legato.io/t/wp7603-legato-18-5-1/3415/4 "2018-07-26T07:06:03Z")
HI Francis, when getting a better radio level, is your issue solved? ---
**Author:** ![FrancisDuhaut](https://avatars.discourse-cdn.com/v4/letter/f/f0a364/32.png) [@FrancisDuhaut](https://forum.legato.io/u/FrancisDuhaut)\ **Post date:** [July 27, 2018, 5:17am UTC](https://forum.legato.io/t/wp7603-legato-18-5-1/3415/5 "2018-07-27T05:17:55Z")
Yes but in case of bad level reception we need to power off power on the mangoh red to have a AV connection. ---
**Author:** ![plu](https://avatars.discourse-cdn.com/v4/letter/p/e19b73/32.png) [@plu](https://forum.legato.io/u/plu)\ **Post date:** [July 27, 2018, 12:17pm UTC](https://forum.legato.io/t/wp7603-legato-18-5-1/3415/6 "2018-07-27T12:17:13Z")
HI Francis, did you notice if the signal level is better after the power off/on , explaining the connection succeeded? If it is the case, we can imagine that the device has found a better network/cell. could you have access to the device? ---
**Author:** ![FrancisDuhaut](https://avatars.discourse-cdn.com/v4/letter/f/f0a364/32.png) [@FrancisDuhaut](https://forum.legato.io/u/FrancisDuhaut)\ **Post date:** [July 27, 2018, 7:13pm UTC](https://forum.legato.io/t/wp7603-legato-18-5-1/3415/7 "2018-07-27T19:13:27Z")
I have no remote access. In case of very bad connection the connection with AV seems lost and not come back. Only with power off/on. I have a avcController who stop/start AV session in case of network is lost with a retry timer. I have send information to Sierra about AV session failed authentification to add log on the AV BS server. But it seems difficult to have answer. How is the best way to maintain connection with AV ? If the network is bad is necessary to restart network scan ? Example will be great. Thanks Francis ---
**Author:** ![bharath\_08](https://avatars.discourse-cdn.com/v4/letter/b/db5fbb/32.png) [@bharath\_08](https://forum.legato.io/u/bharath_08)\ **Post date:** [August 7, 2018, 2:37pm UTC](https://forum.legato.io/t/wp7603-legato-18-5-1/3415/8 "2018-08-07T14:37:53Z")
Hi @FrancisDuhaut, "I have no remote access. In case of very bad connection the connection with AV seems lost and not come back. Only with power off/on " “If the network is bad is necessary to restart network scan ?” Are you mentioning about the device power OFF and ON or cm radio OFF and ON, in the above lines. Best Regards, Bharath