<div><div dir="auto">I looked into this as to allowing traffic for WiFi calling on our corporate WiFi. </div></div><div dir="auto"><br></div><div dir="auto">Allowing (or denying) traffic to these URLs should be enough to manage WiFi calling. </div><div dir="auto"><p style="margin:0.8em 0px;font-family:CustomOpenSans,"Helvetica Neue",Helvetica,Arial,sans-serif"><tt>epdg.epc.<carrier mnc>.<carrier mcc>.<a href="http://pub.3gppnetwork.org">pub.3gppnetwork.org</a></tt></p><p style="margin:0.8em 0px;font-family:CustomOpenSans,"Helvetica Neue",Helvetica,Arial,sans-serif">so for Telstra that would be:</p><p style="margin:0.8em 0px;font-family:CustomOpenSans,"Helvetica Neue",Helvetica,Arial,sans-serif"><tt><a href="http://epdg.epc.mnc001.mcc505.pub.3gppnetwork.org">epdg.epc.mnc001.mcc505.pub.3gppnetwork.org</a></tt></p></div><div><div dir="auto">The MNC and MMC values are publicly available. </div><div dir="auto"><br></div><div dir="auto">It’s also just an IPSec tunnel so you could always block that if you were so inclined. </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 12 Oct 2019 at 10:15, <<a href="mailto:mike@ozonline.com.au">mike@ozonline.com.au</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi All,<br>
<br>
So Telstra mobile services increasingly seem to revert to using<br>
Wifi calling even in the presence of decent signal strength.<br>
<br>
If I were a CDN wanting to connect to Telstra IP,<br>
they'd charge me for injecting traffic into their network or for transit,<br>
and yet Telstra is injecting traffic into our our network to carry <br>
some of their cell traffic, without payment or agreement.<br>
<br>
Now you might say, sure, but we're doing that for our customers not <br>
for Telstra. But Telstra themselves will charge CDNs for delivering <br>
content<br>
to Telstra's customers, something Telstra's end customers are presumably<br>
already paying for. So yeah, we know in this industry what is good for the<br>
goose is not always good for the gander.<br>
<br>
Another point, Telstra, who are our sworn competitors, are using our <br>
network for Wifi calling to supplement their mobile network. Presumably<br>
this use of their competitor's networks reduces their capital investment<br>
requirement and supports their revenue stream by raising the<br>
quality of their coverage. Hence Telstra's use of their competitor's networks<br>
enhances their ability to dominate the industry, again without<br>
any kind of settlement to their competitor ISPs.<br>
<br>
Thoughts?<br>
<br>
Also, anyone have any thoughts about what ACL one might put in place<br>
to block wifi calling if one was of a mind to?<br>
<br>
Michael<br>
Australia On Line.<br>
<br>
<br>
<br>
<br>
<br>
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</blockquote></div></div>