The Intelligent Network [IN] is a network architecture that overlays
the core fixed or mobile telecommuncations networkto carry value-add
differentiation services. This may include simple services such
Toll free calls
In IN, the intelligence is taken out of the switch and placed in
computer nodes distributed throughout the network. This enables
the network operator to develop and control services more efficiently.
New capabilities can be rapidly introduced into the network. Once
introduced, services are easily customized to meet individual customer's
Key Benefits Of Intelligent Networks
There are several key benefits to Intelligent Networks:
Introduce new services rapidly - IN provides
the capability to provision new services or modify existing services
throughout the network without physical intervention.
Service customization - Customers are also
demanding control of their own services to meet their individual
needs. Service providers require the ability to change the service
logic rapidly and efficiently to meet these needs.
Vendor independence - to develop service capability
and software quickly and inexpensively, suppliers must integrate
commercially available software.
Open interfaces - Open interfaces allow service
providers to introduce third party network elements quickly for
individualized customer services, while still maintaining stringent
network operations standards. Service providers are no longer
relying on one or two vendors to provide equipment and software.
The IN concepts, architecture and protocols were developed as
standards by the ITU-T which is the standardization committee of
the International Telecommunication Union. A set of ITU-T standards
named Q.1210 to Q.1219, or Capability Set One (CS-1) was published,
with further enhancements in CS-2.
Intelligent Networks Architecture
The IN services or architecture includes:
Service Switching Function (SSF) or Service Switching Point (SSP)
The SSF/SSP is co-located with the telephone exchange, and acts
as the trigger point for further services to be invoked during a
The SSP implements the Basic Call State Machine (BCSM) which represents
the call state [off hook; dialling; answer; no answer; busy; hang
As each state is traversed, the exchange encounters Detection Points
(DPs) at which the SSP may invoke a query to the SCP to wait for
further instructions on how to proceed.
This query is usually called a trigger. Trigger criteria are defined
by the operator and might include the subscriber calling number
or the dialled number.
Service Control Function (SCF) or Service Control Point (SCP)
The SCR/SCP is a separate set of platforms that receive queries
from the SSP.
The SCP contains service logic which implements the behaviour desired
by the operator.
During service logic processing, additional data required to process
the call may be obtained from the SDF. The logic on the SCP is created
using the SCE.
Service Data Function (SDF) or Service Data Point (SDP)
The SDF/SDP is a database that contains additional subscriber data,
or other data required to process a call. For example, the subscribers
prepaid credit which is remaining may be an item stored in the SDF
to be queried in real time during the call.
The SDF may be a separate platform, or is sometimes co-located
with the SCP.
Service Creation Environment (SCE)
The SCE is the development environment used to create the services
present on the SCP. Standards permit any type of environment, although
mostly proprietary graphical languages have been used to enable
telecom engineers to create services directly.
Specialized Resource Function (SRF) or Intelligent Peripheral
The SRF/IP is a node which can connect to both the SSP and the
SCP and delivers additional special resources into the call, for
example play voice announcements or collect DTMF tones from the
Future of IN
Active development in IN has declined in recent years, however,
with many proven systems deployed across the world continuing to
provide revenue , manufacturers continue to support the equipment
and obsolescence is not an issue.
While the IN is capable of meeting the ever-changing needs of customers,
network intelligence is becoming increasingly distributed and complicated.
Third-party service providers are interconnecting with traditional
operating company networks, and govenrment mandates around local
number portability [LNP] present many issues that can only be resolved
in an IN environment.
New technologies and architectures in VOIP and SIP are diverting
attention to to the use of APIs in preference to protocols like
INAP. New standards have emerged in the form of JAIN and Parlay.
The SCE is moving away from proprietary graphical languages, and
is moving towards a Java application server environment.
Video - 2007 Update On Intelligent Networks
INTECH activities are focused on satisfying the requirements of
the wire line and wireless telephone service operators by developing
value added intelligence and application. As part of their corporate
strategy, INTECH maintains research and development activities of
new products, especially in the service layer, VoIP and information
technology for telecom operators and enterprises.