Wi‑Fi Calling
Wi‑Fi Calling enables mobile voice calls and text messaging over Wi‑Fi networks while preserving the mobile phone number and prioritizing carrier voice traffic to maintain call quality across wireless networks.
Feature Overview
When supported by the mobile service provider, Wi‑Fi Calling allows mobile devices to authenticate with the carrier network and establish a secure IPSec tunnel through an Evolved Packet Data Gateway (ePDG) to route voice and messaging traffic over a Wi‑Fi network.
The Wi‑Fi network identifies Wi‑Fi Calling clients and applies Quality of Service (QoS) policies to prioritize voice traffic.
Wi‑Fi Calling operates as a configurable service that can be associated with selected wireless networks and supports carrier‑specific configuration through predefined or custom ePDG profiles, including multiple ePDG endpoints per carrier.
- Prioritizes voice traffic over data traffic using Quality of Service (QoS) policies.
- Supports seamless roaming across access points during Wi‑Fi Calling sessions.
- Provides visibility into Wi‑Fi Calling statistics.
- Enables accurate classification and prioritization of Wi‑Fi voice traffic.
- Supports QoS prioritization options, such as Voice, Video, Best Effort, and Background.
- Supports configuration of more than one ePDG FQDN or address per carrier.
- Maintains traffic prioritization during roaming.
Requirements
This feature has no special hardware or software requirements for feature enablement or usage.
Considerations
This feature has no special considerations pertaining to feature enablement or usage.
Limitations
- Wi‑Fi Calling availability and behavior depend on mobile carrier support and device capabilities.
- Predefined carrier ePDG profiles may be available only for select carriers or regions.
Best Practices
This feature has no special recommendations for feature enablement or usage.
Prerequisites
This feature has no prerequisites for feature enablement or usage.