Avaya one-X® Mobile SIP is a softphone application for Apple iOS devices that allows users to make and receive phone calls over WiFi or cellular data networks using their iPhone, iPad, or iPod Touch. The app provides call handling features and integrates with contacts and call history. It connects to Avaya Session Manager and Communication Manager to enable mobile VoIP connectivity to the enterprise phone system. The solution aims to improve productivity, flexibility, and cost savings for businesses compared to traditional desk phones.