# Invite a H.323/SIP room system using API

**URL:** <https://devforum.zoom.us/t/invite-a-h-323-sip-room-system-using-api/95583>\
**Category:** Meetings\
**Created:** [September 21, 2023, 11:00pm UTC](https://devforum.zoom.us/t/invite-a-h-323-sip-room-system-using-api/95583 "2023-09-21T23:00:47Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![Steven\_Aziz](https://avatars.discourse-cdn.com/v4/letter/s/91b2a8/32.png) [@Steven\_Aziz](https://devforum.zoom.us/u/Steven_Aziz)\
**Post date:** [September 21, 2023, 11:00pm UTC](https://devforum.zoom.us/t/invite-a-h-323-sip-room-system-using-api/95583/1 "2023-09-21T23:00:47Z")

</div>

Hi,

Instead of manually initiating a callout from the zoom client by going to Participants-\>Invite…-\>Room Systems-\>Callout-\>SIP.  
Is there a way to initiate the SIP Callout using Zoom’s API, for a meeting currently taking place?

---

<div class="post-metadata">

**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [September 26, 2023, 8:26pm UTC](https://devforum.zoom.us/t/invite-a-h-323-sip-room-system-using-api/95583/2 "2023-09-26T20:26:37Z")

</div>

Hi @Steven_Aziz  
Thanks for reaching out to us.  
As far as I am aware, we do not have an endpoint that will allow you to programatically initiate the SIP callout  
Feel free to make a feature request for it here:

> **[Feature Requests](https://devforum.zoom.us/c/feature-requests/23)**
>
> Have an API or SDK feature request? Share it here!

Cheers,  
Elisa

---

<div class="post-metadata">

**Author:** ![Steven\_Aziz](https://avatars.discourse-cdn.com/v4/letter/s/91b2a8/32.png) [@Steven\_Aziz](https://devforum.zoom.us/u/Steven_Aziz)\
**Post date:** [October 3, 2023, 10:58pm UTC](https://devforum.zoom.us/t/invite-a-h-323-sip-room-system-using-api/95583/3 "2023-10-03T22:58:38Z")

</div>

I have found that I can use the Windows Meeting SDK with the C# Wrapper to initiate the call with: ZOOM\_SDK\_DOTNET\_WRAP.CZoomSDKeDotNetWrap.Instance.GetMeetingServiceWrap().GetH323Helper().CallOutH323(new H323Device() { type = H323DeviceType.H323DeviceType\_SIP, name = “test”, ip = calloutAddress });

I am also using:ZOOM\_SDK\_DOTNET\_WRAP.CZoomSDKeDotNetWrap.Instance.GetMeetingServiceWrap().GetMeetingParticipantsController().GetParticipantsList()  
and ZOOM\_SDK\_DOTNET\_WRAP.CZoomSDKeDotNetWrap.Instance.GetMeetingServiceWrap().GetMeetingParticipantsController().GetUserByUserID  
and checking  
IsH323User() to determine if a callout has already taken place.

Is there a way to check what address was used for the H323User?

Also, there is an issue with IsH323User() in the C# wrapper v5.16. I have been able to modify the SDK to fix the issue, but i would need to fix this issue every quarter when the SDK is updated. Can you please include the fix in the future releases so that i would not have to make the fix every quarter?

---

<div class="post-metadata">

**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [October 6, 2023, 4:29pm UTC](https://devforum.zoom.us/t/invite-a-h-323-sip-room-system-using-api/95583/4 "2023-10-06T16:29:54Z")

</div>

> [@Steven\_Aziz](#):
>
> H323User

Hi @Steven_Aziz  
I believe these are the only endpoints available

> **[Zoom Meeting API](https://developers.zoom.us/docs/api/rest/reference/zoom-api/methods/#tag/H323-Devices)**
>
> API Reference for /docs/api/rest/reference/zoom-api/methods

---

<div class="post-metadata">

**Author:** ![Steven\_Aziz](https://avatars.discourse-cdn.com/v4/letter/s/91b2a8/32.png) [@Steven\_Aziz](https://devforum.zoom.us/u/Steven_Aziz)\
**Post date:** [October 6, 2023, 8:39pm UTC](https://devforum.zoom.us/t/invite-a-h-323-sip-room-system-using-api/95583/5 "2023-10-06T20:39:14Z")

</div>

1. Can you confirm whether IsH323User() in the windows meeting sdk will be fixed?
2. Is there a way in the windows meeting sdk to determine the endpoint address used by an h323user?

---

<div class="post-metadata">

**Author:** ![Agility](https://avatars.discourse-cdn.com/v4/letter/a/d07c76/32.png) [@Agility](https://devforum.zoom.us/u/Agility)\
**Post date:** [October 16, 2025, 8:49am UTC](https://devforum.zoom.us/t/invite-a-h-323-sip-room-system-using-api/95583/6 "2025-10-16T08:49:49Z")

</div>

Just wanted to double check, at this time Oct 2025, is there an endpoint will allow me to programatically initiate the SIP callout?