This read-write enumerated value determines the type of address translation applied to calls entering the network at this port, among disabled, tunnel, translate-e164-native-to-nsap, or translate-e164-nsap-to-native, with the description noting tunneling mode reverses egress tunneling: if a called subaddress is present it replaces the called party address (discarding the original), and likewise for a calling subaddress replacing the calling party address. This is the inbound-direction counterpart to svcConfigEgressAddrXlateMode, undoing whatever tunneling or translation was applied by a peer network's egress translation so the call presents correctly once inside this network. An engineer receiving calls from a peer network that tunnels addresses would set svcConfigIngressAddrXlateMode to tunnel(2) on the corresponding ingress port so the switch correctly unwraps the tunneled subaddress back into the primary address fields.