SIP Application Server (N2AS)

SIP Application Logic Scripting Platform

The N-Squared SIP Application Server is a general-purpose platform which is appropriate for a wide range of SIP call-handling services such as:

  • Number Portability
  • Call Screening
  • Closed User Group
  • In-Calling Services (e.g. Self-Management, Vouchers, Information)
  • Out-Calling Services (e.g. One-Time-Password, Voice Reminders)

The N2AS has built-in support for announcements and digit collection, meaning that it can equally be used as general-purpose, in-network, script-driven IVR appliance, including script-driven Automated Call Distribution (ACD) interactions.

Note that while the N2AS platform can be used to implement ACD scripts managed by the platform administrator, sites looking to support a large-number of ACD services, or looking to offer self-managed ACD services, with account management, and graphical ACD flow design will need to also deploy our separately-licensed N2ACD-SIP product.


User & Technical Guide

Protocol Conformance Statements

Supplementary Features

Each inbound or outbound call is controlled by arbitrary scripted service logic, written in the Lua Scripting Language - a lightweight, high-level, multi-paradigm programming language designed specifically for embedded use in applications such as this one.

Lua provides a full service logic language, including string manipulation, mathematics, control statements, libraries for JSON, XML, and many other encodings and APIs. In addition, scripts may also use convenient pre-defined callouts for:

  • REST Client requests
  • SOAP CLient requests
  • Database Lookup/Update requests
  • Diameter Client requests
  • OCNCC FOX Client requests

The N2AS logic may read information from a local or remote database. Note that the default N2AS deployment does not include a database – any database creation or data management is a site-specific extension.

Deployment Notes

Platform Sizing

The N-Squared SIP Application Server is ideal for small/medium-sized operators needing a cost-effective, highly flexible SIP Application Server appliance for rapid rollout of

The solution is laterally scalable with N+1 deployment for High-Availability, Geographic Redundancy, and to support increased traffic growth.

OSS/BSS Features

N2AS has Administration GUIs for audio file management and platform monitoring. Standard Operational features include Alarms, Statistics, and Event Data Records.

The SRP generates Event Data Records including:

  • SIP EDRs describing the SIP voice trunk interaction.
  • INAP EDRs describing the INAP call control interaction.

N2SVCD Components

The N2AS is built on the N2SVCD framework. The following diagram shows the N2SVCD components which are deployed for N2AS:

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