This unique technology in the company's Tenor VoIP MultiPath Switches allows VoIP implementers to keep their VoIP gateways behind NATs and NAT-enabled firewalls. NATAccess performs network address translation within packet payloads during the call set-up process. By providing the outside party's router with the appropriate public IP addresses for internal users, NATAccess allows authorized streaming VoIP traffic – and only authorized traffic – to pass through the firewall.