How it works
Push delivery depends on connectivity, device tokens and power-saving settings; the notification itself does not carry the call audio. Business mobility combines calling apps, phone numbers, devices and access policies. Availability depends on the mobile carrier, network and device configuration.
Business example
When a softphone is in the background, a push notification can help present an incoming call if the platform supports it.
What to consider
Review corporate-data security, off-site connectivity, operating-system restrictions and roaming or data charges before rolling out the feature.