# SL6087 problems

**URL:** <https://forum.sierrawireless.com/t/sl6087-problems/5709>\
**Category:** Legacy AirPrime modules\
**Created:** [July 6, 2012, 10:18am UTC](https://forum.sierrawireless.com/t/sl6087-problems/5709 "2012-07-06T10:18:20Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\
**Post date:** [July 14, 2012, 8:44am UTC](https://forum.sierrawireless.com/t/sl6087-problems/5709/6 "2012-07-14T08:44:28Z")

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> [@mazue](#):
>
> We finally found why we were unable to register to the network. Our internal power supply was not strong enough. Using an external power supply we could exchange data and voice call.

> [@FAQ forum/wiki?](https://forum.sierrawireless.com/t/faq-forum-wiki/3491/12):
>
> Hiya, Looks like a number of users are having strange or intermittent issues with their modules that end up being resolved by fixing the module PSU. See [here](http://www.wavecom.com/modules/movie/scenes/forums/posting.php?mode=reply&f=16&t=4056#pr16703) and [here](http://www.wavecom.com/modules/movie/scenes/forums/viewtopic.php?f=29&t=4162) for a couple of examples. Of course, there’s also the Power Supply forum to peruse as well. ciao, Dave

> [@Can't send messages and make calls](https://forum.sierrawireless.com/t/cant-send-messages-and-make-calls/5177/3):
>
> FAQ! [https://forum.sierrawireless.com/t/faq-forum-wiki/3491/1](https://forum.sierrawireless.com/t/faq-forum-wiki/3491/1)

> [@Problems booting the board](https://forum.sierrawireless.com/t/problems-booting-the-board/3926/4):
>
> Power supply issues? See: [viewtopic.php?f=7&t=3766&hilit=wiki#p16724](http://www.wavecom.com/modules/movie/scenes/forums/viewtopic.php?f=7&t=3766&hilit=wiki#p16724)

etc, etc,…

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