The CUE AA receives call from the CME via a SIP dial peer. So as long as you have a dial peer that points to the IP address of the CUE , it should be reachable from POTS legs , IP legs (if you have 'voice service voip'/'allow connections ...' configured) and ephone call legs.
The dial peer should be something like this -
!
dial-peer voice 10 voip
description - calls to AA application on the CUE
destination-pattern 5000
session target ipv4:10.1.1.1 <---Ip address of CUE
session protocol sipv2
codec g711ulaw
dtmf-relay sip-notify
!
The CUE will need to have a relevant config as well - you can enable the aa application from the GUI or from the CUE cli. All it needs is a trigger number that matches what you have configured under the SIP dial peer on the CME.
Otherwise paste the configs of the CME and CUE here so we can have a look at it.
