Quality of Service (QOS) — provides the ability to provide different priorities to different pre-marked packets (applications, users, or data flows) or to guarantee a certain level of performance to those packets across the DISN. It does not provide on customer's traffic a higher priority than another customer's traffic.

Voice Features

• Provides an interface between the IP telephony and the circuit-switched network.
  
• Provides the full range of supplemental user features (e.g., call hold, call transfer, and abbreviated dialing) available from IP telephony.
  

Security Features

• Uses a separate IP address space for voice communications.
  
• Firewalls are installed at each VoSIP core site, and access control lists are deployed on all routers and gateways to ensure that only permitted traffic flows through them.
  
• Maintains compliance with Information Assurance Vulnerability Alert (IAVA) monitoring and implementation according to the guidelines in the IAVA Management Plan.
  
• The VoSIP services features an Identity Management Solution (IMS) designed to discover, identify, and track the use of network resources.

Emergency Access Features

• Emergency calling based on local policies of each enclave (e.g., Network Operating Center (NOC), Theater Communications Control Center, or any other emergency activation capability).
  
• The Cisco Unified MeetingPlace supports emergency access with a host of features (e.g., conferencing features, centralized identity management, access control security mechanisms, host intrusion and detection, directory services, and interoperability with secure voice services).