# Airlink GX400 recieve sms acknowledgement

**URL:** <https://forum.inductiveautomation.com/t/airlink-gx400-recieve-sms-acknowledgement/10598>\
**Category:** Ignition\
**Created:** [October 9, 2015, 2:49am UTC](https://forum.inductiveautomation.com/t/airlink-gx400-recieve-sms-acknowledgement/10598 "2015-10-09T02:49:26Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![CamJam](https://avatars.discourse-cdn.com/v4/letter/c/3ec8ea/32.png) [@CamJam](https://forum.inductiveautomation.com/u/CamJam)\
**Post date:** [October 9, 2015, 2:49am UTC](https://forum.inductiveautomation.com/t/airlink-gx400-recieve-sms-acknowledgement/10598/1 "2015-10-09T02:49:26Z")

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Hi,  
I have an Airlink GX400 and I know the GX400 isn’t specifically covered for Ignition and the LS300 is.  
I have a GX400 setup and sending SMS messages for Alarms by following the same setup as the LS300.  
Just wondering how different the models are for receiving sms? As I can’t seem to acknowledge alarms via sms when two way is enabled in the alarm notification.  
I can see the incoming sms acknowledgment on the GX400 but Ignition doesn’t seem to be picking it up

I have a pc on a fixed ip of 192.168.30.67  
and the gx400 on an ip of 192.168.30.31

I just wondering if I have missed something in the setup.  
attached is my ignition setup and GX400 setup.  
Hopefully someone can help

Thanks  
Cam

 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/2/2366cbd2a278b0d5efc19ca425b252c5956f9b26.JPG)  
  
 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/f/f4967999666b7ab57899b094a7ccd1b95c8036f2.JPG)  
  
 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/5/56f589f8903a2c32048e1440b87ddfd0f0885001.JPG)  
  
 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/6/6cb044caf30b9f3cdfe474e9e04d26889f360a6a.JPG)  
  
 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/4/43af2ff32bb76c77e112cf775c8e3380bca257c6.JPG)

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<div class="post-metadata">

**Author:** ![CamJam](https://avatars.discourse-cdn.com/v4/letter/c/3ec8ea/32.png) [@CamJam](https://forum.inductiveautomation.com/u/CamJam)\
**Post date:** [October 9, 2015, 3:17am UTC](https://forum.inductiveautomation.com/t/airlink-gx400-recieve-sms-acknowledgement/10598/2 "2015-10-09T03:17:15Z")

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Fixed it. Added the Incoming UDP port (17342) to the Firewall and all incoming messages are now working

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**Author:** ![Cory.grube](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/cory.grube/32/20476_2.png) [@Cory.grube](https://forum.inductiveautomation.com/u/Cory.grube)\
**Post date:** [May 27, 2021, 8:33pm UTC](https://forum.inductiveautomation.com/t/airlink-gx400-recieve-sms-acknowledgement/10598/3 "2021-05-27T20:33:25Z")

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Just ran into this with an RV50x, and switching to UDP solved it for me as well.

The [gateway port reference](https://www.docs.inductiveautomation.com/docs/8.1/appendix/reference-pages/gateway-port-reference) page is mislabeled - it lists 17341/17342 as TCP ports. Both should be UDP per [Airlink/ALEOS documentation](https://usatcorp.com/pdf/rv50-configuration-guide.pdf), pg 173 steps 6-7.

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [May 27, 2021, 8:47pm UTC](https://forum.inductiveautomation.com/t/airlink-gx400-recieve-sms-acknowledgement/10598/4 "2021-05-27T20:47:32Z")

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I’ll let someone know the documentation needs to be updated.