# Notification timing for Zoom Phone webhook "callee\_ringing".

**URL:** <https://devforum.zoom.us/t/notification-timing-for-zoom-phone-webhook-callee-ringing/94072>\
**Category:** Phone\
**Tags:** webhooks\
**Created:** [August 28, 2023, 12:39pm UTC](https://devforum.zoom.us/t/notification-timing-for-zoom-phone-webhook-callee-ringing/94072 "2023-08-28T12:39:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![biz-ngc-dev-v11-ml](https://avatars.discourse-cdn.com/v4/letter/b/ccd318/32.png) [@biz-ngc-dev-v11-ml](https://devforum.zoom.us/u/biz-ngc-dev-v11-ml)\
**Post date:** [August 28, 2023, 12:39pm UTC](https://devforum.zoom.us/t/notification-timing-for-zoom-phone-webhook-callee-ringing/94072/1 "2023-08-28T12:39:18Z")

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I use a language translation program. Please excuse my poor English.

> **[Zoom API Events - Zoom Phone](https://developers.zoom.us/docs/api/rest/reference/phone/events/#operation/phone.callee_ringing)**
>
> API Reference for /docs/api/rest/reference/phone/events

■ Our purpose  
I would like to detect the Ringing state of UA-Bob over the SIP protocol and perform processing during the Ringing state.

■ Approximate timing for phone.callee\_ringing  
In the image, SIP proxy B serves the Zoom Phone server.  
It is expected that phone.callee\_ringing will be notified by Webhook from immediately after receiving ②INVITE to immediately after receiving ⑥180Ringing.

■ Checking the actual incoming call timing  
⑨ Notification OK after 200.

Is there another way?  
Also, are there any plans to fix this behavior?

![100_01](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/3/a/3adfa3887f3035bb02af49b30176dc3850787b4f.jpeg)

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**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 6, 2023, 2:03pm UTC](https://devforum.zoom.us/t/notification-timing-for-zoom-phone-webhook-callee-ringing/94072/2 "2023-09-06T14:03:03Z")

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Hi @biz-ngc-dev-v11-ml  
Thanks for reaching out to us, I am happy to help here  
You should. be getting the phone.callee\_ringing event as soon as you get the invite

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**Author:** ![biz-ngc-dev-v11-ml](https://avatars.discourse-cdn.com/v4/letter/b/ccd318/32.png) [@biz-ngc-dev-v11-ml](https://devforum.zoom.us/u/biz-ngc-dev-v11-ml)\
**Post date:** [September 8, 2023, 9:06am UTC](https://devforum.zoom.us/t/notification-timing-for-zoom-phone-webhook-callee-ringing/94072/3 "2023-09-08T09:06:30Z")

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Thank you for your reply.  
However, our testing confirms that callee\_ringing is received at the same time as callee\_answerd.  
It wasn’t right after the INVITE.