Hi All.
“SIP Response 380 Alternative Service” is not working for a VoLTE device to CS fallback for all UEs.
Work for Apple devices, but not for other devices.
Any idea, what SIP response for an INVITE can pull down the call to the CS?
Hmmm…not sure but alternative services should be indicated to such UEs.
Can you share messages of Apple and Non-Apple UEs?
May be Apple OS has accommodated tracking the type of service initiated by UE.