VoIP Push

VoIP push is a specialized push notification mechanism that wakes a softphone application when an incoming call arrives — even when the app is closed or the device is in sleep mode. On iOS, Apple provides a dedicated VoIP push (PushKit) framework; on Android, high-priority FCM messages serve a similar purpose.

Without VoIP push, softphone apps would need to maintain a persistent connection to the SIP server, draining battery life. VoIP push allows the app to sleep until needed, then wake instantly to ring. This is critical for a native phone-like experience.

Acrobits Cloud Softphone includes a production-grade VoIP push notification infrastructure that handles Apple PushKit and Google FCM, ensuring near-instant call delivery across both platforms with high reliability at scale.