SIP Application Server - AS
A SIP application server - AS is composed of a computer and associated software that is connected to a communication network and provides information services (applications) for clients (users). Application servers are usually optimized to provide specific applications such as database information access or sales contact management. Application servers are a key component of nextgen networks, and an enabler of IP-based enhanced services. These enhanced services will generate much-needed new revenue streams for service providers. Examples include all forms of conferencing, voice mail and unified messaging. Being softswitch-based, application servers have the flexibility to easily offer services that go beyond the feature set of legacy switched telephony. In terms of network configuration, the application server works in tandem with the media server, providing it with business logic and instructions for delivering enhanced services.