Can you try the following to call the CUE directly..
dial-peer voice 4 voip
session protocol sipv2
incoming called-number 82299
codec g711u
no vad
dtmf-relay sip-notify
++you also need to add dtmf-relay to your dial-peer for CUE++++
dial-peer voice 3 voip
description Unity Express
destination-pattern 82299
b2bua
session protocol sipv2
session target ipv4:10.69.254.25
codec g711ulaw
no vad
dtmf-relay sip-notify
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