# ULPM on FX30

**URL:** <https://forum.sierrawireless.com/t/ulpm-on-fx30/21997>\
**Category:** Octave\
**Tags:** debug\
**Created:** [November 3, 2020, 5:19am UTC](https://forum.sierrawireless.com/t/ulpm-on-fx30/21997 "2020-11-03T05:19:31Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![jj1](https://avatars.discourse-cdn.com/v4/letter/j/c68b51/32.png) [@jj1](https://forum.sierrawireless.com/u/jj1)\
**Post date:** [January 29, 2021, 8:26am UTC](https://forum.sierrawireless.com/t/ulpm-on-fx30/21997/13 "2021-01-29T08:26:46Z")

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Hi James,

I am not sure if this answers your questions but I had similar problems.

I found this thread here:

> [@FX30 Radio Off](https://forum.sierrawireless.com/t/fx30-radio-off/21317/6):
>
> Hi there, I suspect your modem has PSM enabled by accident. Try disabling by: AT!CPSMS=0 BR, Chris

…which explained how to turn PSM off, with AT+CPSMS=0 (not with an exclamation mark as shown in the preview).  
Apparently it solved the problem of the FX30S entering either ULPM or PSM when the antenna was connected.

AT+CPSMS?  
+CPSMS:1,“00011000”,“00001010”  
AT+CPSMS=0  
OK  
AT+CPSMS?  
+CPSMS:0,“00011000”,“00001010”  
OK

I have only been using ULPM from Octave and pmtool from the command line so I have no idea how PSM have been enabled.

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