[BUG] How to Keep the online stattus for the Client

[niliangwen]

OpenIM Server Version

3.8.3

Operating System and CPU Architecture

Linux (AMD)

Deployment Method

Source Code Deployment

Bug Description and Steps to Reproduce

After deployment, Everything seem to OK, The andriod clinet work normal.
But several hours later, client A can't call client B online, the status of the clientB seems is online, But have to relogin to work.

Screenshots Link

No response

[skiffer-git]

Are you referring to the issue of audio and video calls?

[skiffer-git]

To solve this issue, you need to integrate offline push notifications into your system.

[niliangwen]

pls tell me how to integrate the offline push notification, thank you.