I think I'd have to refer that to my carrier.

I'm surprised it could be restricted to a certain model phone. It would make sense if it was calls to one mobile carrier.


On 6/1/2021 1:31 PM, Chuck McCown via AF wrote:
Normal, cellular.

Sent from my iPhone

On Jun 1, 2021, at 9:58 AM, Adam Moffett <[email protected]> wrote:



You mean calling a SIP app on the IPhone, or a normal phone call to the iPhone?  On WiFi or cellular?


On 5/31/2021 7:36 PM, Chuck McCown via AF wrote:
Recently, or office phone system will not pass audio when calling an iphone.  All other types of calls are OK.
iphones can call in just fine.
Something about the RTP is different.  Signaling is fine.  We see the call being answered.

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