# About sendbird Calls API

**URL:** <https://community.sendbird.com/t/about-sendbird-calls-api/9614>\
**Category:** Sendbird Voice/Video Calls\
**Tags:** sendbird-call\
**Created:** [June 3, 2024, 10:18am UTC](https://community.sendbird.com/t/about-sendbird-calls-api/9614 "2024-06-03T10:18:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jjanmo](https://avatars.discourse-cdn.com/v4/letter/j/838e76/32.png) [@jjanmo](https://community.sendbird.com/u/jjanmo)\
**Post date:** [June 3, 2024, 10:18am UTC](https://community.sendbird.com/t/about-sendbird-calls-api/9614/1 "2024-06-03T10:18:51Z")

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Hello, I would like to try using Sendbird’s Calls API. I have a question about the API.  
In the case of using Sendbird’s Calls API, is it impossible to make a call if one side has turned off the program?  
And is there a specification to detect when the other party is offline and send a push notification accordingly?