Guidelines on SmartZone WiFi calling setup for common carriers?

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I've been looking at the SmartZone WiFi calling documentation and understand that the premise is as long as the ePDG hostname/IP is provided, SmartZone will collect more detailed statistics as well as provide better prioritization for wifi calls.

Is there official guidance on the ePDG hosts to configure for popular carriers (at least in the USA, like T-Mobile, Sprint, Verizon, and AT&T)? The documentation provides one domain name that seems to correspond to AT&T.
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John D, AlphaDog

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Posted 1 year ago

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Chad Creason, Employee

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You can find a lot of this information from the Ruckus Wi-Fi Calling Deployment Guide:

https://support.ruckuswireless.com/documents/2832-ruckus-wi-fi-calling-deployment-guide
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EightOhTwoEleven

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I haven't put in the IPs since I didn't know if they changed, or how often and what negative that could have.
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Syamantak Omer, Official Rep

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Hi All,

ISPs may change their ePDG FQDN or IPs frequently and that is not something vendor's documents can update very frequently.

Whenever a new updated version of WiFi calling guide will be released, it will have the latest information.

It is advised to check with vendor for the latest ePDG gateway information and also avoid whitelisting ePDG IPs. Use the ePDG FQDN, so even when IP address may change in background, your firewall will still allow the connection using allowed ePDG FQDN.

Regards,
Syamantak Omer
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EightOhTwoEleven

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Right because some random person can just email these behemoth companies and get an articulated response.