Hi dear,
Sure, The eDC610 can access the enterprise network trunking system through the public network (GSM/UMTS/LTE) or Wi-Fi hotspot or eLTE enterprise network to perform services such as P2P call, group call, video, SMS, MMS, and GIS. Generally, when the eDC610 access the eLTE network through the public network (GSM/UMTS/LTE) or Wi-Fi hotspot, a firewall is deployed between the eLTE network and the Internet. In this case, the NAT function must be enabled on the firewall and the firewall policy is configurable. In scenarios where NAT traversal is involved, configure NAT on the firewall or NAT device so that the eDC610 connected to the public network can reach the firewall using public IP addresses and then are forwarded using NAT of the firewall to the eAPP server on the enterprise network. This enables the eDC610 to access the eLTE network through the public network.