# SIPIS SIPIS (SIP Instance Server) ## Core docs - [SIP Instance Server overview](overview.md) - [Installation guide](installation.md) - [Upgrading](upgrading.md) - [Database schema](database.md) - [Settings.xml](settings.md) - [HTTP interface](http.md) ## Runtime behavior - [Incoming call handling](incoming-calls.md) - [Push status indication](push-status.md) - [Instance cleanup](cleanup.md) ## Operations - [Migrating SIPIS to a different server](migration.md) - [Load balancing](load-balancing.md)