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Pattern to recognize Facetime <pattern>
Wi-Fi Calling
Wi-Fi calling service allows cellular users to make or receive calls using a Wi-Fi network instead of using the
carrier’s cellular network. Wi-Fi calling allows users to place, receive calls, and text messages even when they are
beyond a cellular coverage but having a Wi-Fi network coverage. Major carriers around the world support Wi-Fi
calling service.
Wi-Fi Calling Support in AOS-W
AOS-W provides QoS for voice calls made using Wi-Fi calling. AOS-W can identify and prioritize calls made using
Wi-Fi calling. UCM provides visibility for all voice calls made using Wi-Fi calling.
Wi-Fi Calling Operation
At a high level, this is how Wi-Fi calling operates:
1. Wi-Fi calling capable handset initiates a DNS query to locate the carrier’s evolved Packet Data Gateway
(ePDG).
2. The handset establishes a persistent IPsec tunnel with ePDG.
3. Calls, text, and traffic for other services offered by the carrier are then carried over this IPsec tunnel.
Some carriers use a standard FQDN format for ePDG that includes their Mobile Network Code (MNC) and
Mobile Country Code (MCC). For example, T-mobile uses ss.epdg.epc.mnc260.mcc310.pub.3gppnetwork.org.
Others follow a different standard format. For example, AT&T uses epdg.epc.att.net.
Wi-Fi Calling Configuration
The Wi-Fi Calling ALG can be using the switch WebUI or CLI. The ALG is enabled by default.
In the WebUI
The following procedure configures the Wi-Fi Calling ALG using the WebUI.
1. Navigate to Configuration >Advanced Services > All Profiles.
2. Expand Other Profiles and click WiFi Calling Configuration.
3. In the Profile Details section, configure the settings described in Table 237.
4. Click Save.
Parameter Description
WiFi Calling Support Enable the Wi-Fi Calling ALG. The ALG is enabled by default.
DNS Pattern dns-pattern–Configure the DNS pattern for the carrier. A maximum of 10 DNS patterns can
be configured.
DNS patterns for known carriers are configured by default. Default built-in patterns are:
n SmarTone - epdg.epc.mnc006.mcc454.pub.3gppnetwork.org
n T-mobile - ss.epdg.epc.mnc260.mcc310.pub.3gppnetwork.org
n Sprint - primgw.vowifi2.spcsdns.net
n Verizon - wo.vzwwo.com
n 3 HK - wlan.three.com.hk
n ATT - epdg.epc.att.net
n Rogers - epdg.epc.mnc720.mcc302.pub.3gppnetwork.org
If the ePDG FQDN of the carrier does not match with the default patterns, use this option to
configure the DNS pattern for the carrier.
service-provider–Add the service provider name for enhanced visibility.
Table 237: Wi-Fi Calling Configuration Parameters
AOS-W 6.5.3.x | User Guide Voice and Video | 969
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