Understanding Intelligent Network Architecture

Intelligent Network Architecture is a game-changer in the way networks are designed and managed. It's built on the concept of a service-based architecture, where services are decoupled from the underlying infrastructure.

This architecture allows for greater flexibility and scalability, as services can be easily added, removed, or modified without affecting the underlying network. In fact, the Intelligent Network architecture is designed to be highly modular and flexible.

The Intelligent Network architecture is based on a set of standardized interfaces and protocols, which enables different systems and devices to communicate with each other seamlessly. This is achieved through the use of standardized APIs and data models.

As a result, the Intelligent Network architecture enables faster deployment and scaling of new services, which is a major advantage in today's fast-paced business environment.

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The Intelligent Network (IN) has a rich history that dates back to its development as standards by the ITU-T, the standardization committee of the International Telecommunication Union.

These standards, known as Capability Set One (CS-1), defined a complete architecture for the IN, including the architectural view, state machines, physical implementation, and protocols. They were universally adopted by telecom suppliers and operators.

The primary aim of the IN was to enhance traditional telephony services, which mostly involved making and receiving voice calls, with some call divert capabilities.

The IN was designed to provide a flexible way of adding sophisticated services to the existing network, allowing service providers to develop variations and value-added services without relying on core switch manufacturers.

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Service examples are numerous and varied, but some of the most notable ones include televoting, call screening, and local number portability. These services allow for more flexibility and convenience in how we use our phones.

Some examples of Intelligent Network Services include Automatic Call Distribution, which optimizes call handling and reduces wait times by intelligently routing incoming calls to the most appropriate agent or department. This is a game-changer for customer service teams.

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Other examples include Interactive Voice Response, which provides self-service options such as account inquiries and bill payments, and Virtual Private Networks, which establish secure encrypted connections over public networks. These services are particularly useful for remote workers.

Intelligent Call Routing is another example, which analyzes caller information to dynamically route calls to the most appropriate destination. This can be a big help for businesses with multiple departments or locations.

Here are some examples of IN services:

The International Network (IN) was originally developed as a standard by the ITU-T, the standardization committee of the International Telecommunication Union.

Before the IN, telecommunications providers had proprietary implementations, but the IN provided a more flexible way of adding sophisticated services to the existing network.

The primary aim of the IN was to enhance core telephony services, which typically consisted of making and receiving voice calls, sometimes with call divert.

A complete description of the IN emerged in a set of ITU-T standards named Q.1210 to Q.1219, or Capability Set One (CS-1).

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The IN allowed service providers to develop variations and value-added services without submitting a request to the core switch manufacturer and waiting for a long development process.

The initial use of IN technology was for number translation services, such as translating toll-free numbers to regular PSTN numbers.

Following the success of CS-1, further enhancements followed in the form of CS-2, which addressed issues that pushed traditional telephone exchanges to their limits.

The IN made it possible to move services like toll-free numbers and geographical number portability out of the core switch systems and into self-contained nodes, creating a more modular and secure network.

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The Intelligent Network (IN) architecture is built around several key components, each with its own unique function. These components include the Service Switching Function (SSF), Service Control Function (SCF), Service Data Function (SDF), Service Management Function (SMF), Service Creation Environment (SCE), and Specialized Resource Function (SRF).

The SSF is co-located with the telephone exchange and acts as the trigger point for further services to be invoked during a call. It implements the Basic Call State Machine (BCSM), which represents an abstract view of a call from beginning to end. The SSF is responsible for controlling calls requiring value-added services.

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The IN architecture also relies on standard protocols to communicate between its components. The interface between the SSP and the SCP is SS7 based, with similarities to TCP/IP protocols. The SS7 protocols implement much of the OSI seven-layer model, with the IN standards only defining the application layer, called the Intelligent Networks Application Part or INAP. INAP messages are encoded using ASN.1.

The interface between the SCP and the SDP is defined as an X.500 Directory Access Protocol or DAP. However, a more lightweight interface called LDAP has emerged, which is considerably simpler to implement.

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Televoting allows users to participate in voting processes using their phones.

Call screening lets users block unwanted calls from specific numbers or categories.

Local number portability enables users to keep their phone numbers when switching to a different service provider.

Toll-free calls or Freephone services allow users to make calls without incurring charges.

Prepaid calling and Account card calling allow users to pay for calls in advance.

Virtual private networks, such as family group calling, provide secure and private connections for groups of users.

Centrex service, or Virtual PBX, allows users to manage their phone systems remotely.

Private-number plans keep users' numbers unpublished in directories for added privacy.

Universal Personal Telecommunications service provides users with a universal personal telephone number.

Here are some additional IN services examples:

The protocols used in Intelligent Networks (IN) are designed to allow different manufacturers to work together seamlessly. This is achieved through the use of standard protocols that enable communication between the various components of the architecture.

The interface between the Service Switching Point (SSP) and the Service Control Point (SCP) is based on SS7 protocols, which have similarities with TCP/IP protocols. These protocols implement much of the OSI seven-layer model, leaving the IN standards to define only the application layer, known as the Intelligent Networks Application Part (INAP).

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INAP messages are encoded using ASN.1, a standard format for encoding data. This allows for efficient and reliable communication between the SSP and SCP.

The interface between the SCP and the Service Data Function (SDF) is defined in the standards to be an X.500 Directory Access Protocol (DAP). However, a more lightweight interface called LDAP has emerged, which is considerably simpler to implement and is now widely used in many SCPs.

Here's a brief overview of the protocols used in IN:

Network security is crucial for intelligent networks platforms in telecommunications areas. Service Feature is a key component of network security, ensuring that services are properly configured and managed.

Intelligent Network platforms rely on Service Logic to provide secure and efficient service delivery. This includes features like authentication, authorization, and accounting (AAA) to prevent unauthorized access.

Network Capability is another essential aspect of network security, enabling the network to detect and respond to security threats in real-time. This includes features like intrusion detection and prevention systems (IDPS) and firewalls.

Functional Entity plays a vital role in network security, providing a secure and reliable environment for service delivery. This includes features like encryption and secure key management.

Here's a list of key network security components:

The future of Intelligent Networks is looking bright, with many systems already deployed across the world that use this technology.

Manufacturers continue to support the equipment, making obsolescence not an issue. New services are being added all the time, generating a continuing source of revenue.

New technologies and architectures have emerged, especially in the area of VoIP and SIP. APIs are being used in preference to protocols like INAP.

JAIN and Parlay are new standards that have emerged, and the SCE is moving away from its proprietary graphical origins towards a Java application server environment.

The meaning of "intelligent network" is evolving, largely driven by breakthroughs in computation and algorithms. Networks are being designed using data-driven models to AI-enabled networks.

Here are some key technologies that are being used in Intelligent Networks: