# Voice Alarm Notification Grandstream HT-813 Call Out Issue **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [October 11, 2023, 5:38pm UTC](https://forum.inductiveautomation.com/t/voice-alarm-notification-grandstream-ht-813-call-out-issue/80354 "2023-10-11T17:38:59Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![BLG](https://avatars.discourse-cdn.com/v4/letter/b/9e8a1a/32.png) [@BLG](https://forum.inductiveautomation.com/u/BLG)\ **Post date:** [October 11, 2023, 5:38pm UTC](https://forum.inductiveautomation.com/t/voice-alarm-notification-grandstream-ht-813-call-out-issue/80354/1 "2023-10-11T17:38:59Z")
Hi all, Looking for help with setting up the Grandstream HT-813 for voice callouts via a PSTN line. I have spent a lot of time trying to make it work to no avail. I have followed the Ignition Knowledge Base How-To-Guide to a tee and cannot get the HT-813 to call out. The HT-813 is connected to the network via the WAN port and phone line is plugged into the FXO port. A recent thread on this forum dealt with the same issue: > [@Ignition 8.1.23 Alarm Notification Profile to Grandstream HT813](https://forum.inductiveautomation.com/t/ignition-8-1-23-alarm-notification-profile-to-grandstream-ht813/68236): > > Good Afternoon All, Was using an older Grandstream HT503 rather than this HT813. The voice call issue didn't get resolved so I decided to upgrade the VOIP modem and start over. Possibly eliminating older firmware etc. Today I followed the knowledge base article step by step for the Grandstream HT813. Still not getting the voice modem call out test to work. Could anyone verify the expected parameter in the following configuration... The article example did not show the gateway notification conf… The user had issues with communication between Ignition and HT-813 due to the HT-813 being connected via the LAN port. Once someone proposed that the network connection was switched to the WAN port, the communication started working and HT-813 dialed out. In my case, I am connected via the WAN port and my comms between Ignition and HT-813 appear to be working. As shown in the Ignition Debug Log image below, I am able to receive the correct SIP responses from the HT-813 - Status: 100 Trying, Status: 180 Ringing and Status: 200 OK (Invite) but there is no callout. As part of my troubleshooting, I procured as second HT-813 unit and both behave the same. I'm running the latest firmware. Any help would be much appreciated. ---
**Author:** ![BLG](https://avatars.discourse-cdn.com/v4/letter/b/9e8a1a/32.png) [@BLG](https://forum.inductiveautomation.com/u/BLG)\ **Post date:** [October 13, 2023, 1:09pm UTC](https://forum.inductiveautomation.com/t/voice-alarm-notification-grandstream-ht-813-call-out-issue/80354/2 "2023-10-13T13:09:24Z")
SOLVED: The issue ended up being on the PBX/PSTN line and once that was resolved the callouts started working. ---
**Author:** ![Aaron\_Phillips](https://avatars.discourse-cdn.com/v4/letter/a/e0b2c6/32.png) [@Aaron\_Phillips](https://forum.inductiveautomation.com/u/Aaron_Phillips)\ **Post date:** [December 11, 2025, 1:58pm UTC](https://forum.inductiveautomation.com/t/voice-alarm-notification-grandstream-ht-813-call-out-issue/80354/3 "2025-12-11T13:58:17Z")
Hey BLG, I know it has been a while, but can you explain what that issue was with the PBX/PSTN line? I am having similar issues as to what you are having and I followed that setup guide for the HT-813 as well. ---
**Author:** ![BLG](https://avatars.discourse-cdn.com/v4/letter/b/9e8a1a/32.png) [@BLG](https://forum.inductiveautomation.com/u/BLG)\ **Post date:** [December 11, 2025, 2:35pm UTC](https://forum.inductiveautomation.com/t/voice-alarm-notification-grandstream-ht-813-call-out-issue/80354/4 "2025-12-11T14:35:49Z")
It ended up being an issue with the POTS line itself. Once that got sorted out, the HT-813 worked as intended.