The document discusses intelligent networks (IN) and their components. An IN allows services to be added or changed without redesigning switching equipment by separating the call logic from the switches. The key components are the service control point (SCP) which contains service logic and subscriber data, service switching points (SSP) which identify IN calls and interact with the SCP, and a service management point (SMP) which creates and manages services. The document provides examples of IN services in India including prepaid cards, toll-free numbers, and universal access numbers.

1. For circulation to Trainees only 1
INTELEGENT NETWORK

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All the present PSTN switches contains a fixed number
of services. To implement any new service in the
network, modification had to be made in all the switches
which leads to:
• Wastage of Time and Manpower.
• Fault prone implementation.
• Long Roll out time.
• Long and tedious implementation of correction and
modification patches.
WHY INTELLIGENT NETWORK (IN)?

3. For circulation to Trainees only 3
DISADVANTAGES OF EXISTING FRAMEWORK
• Software modification required in all exchanges
• Introduction of new service takes long time
• Modifying or improving the service requires modification
of software
• Services are non- standard
• Advanced services are NOT possible
• Services across exchanges are difficult to create
3

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• IN is a telephone network architecture in which logic
handling the call is located separately from switching
facilities.
• This allows services to be added or changed in the
network without having to redesign the switching
equipment.
WHAT IS AN IN?

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WHAT IS MEANT BY SERVICE
* By Service we mean some additional facilities given to the
subscriber to control his call
e.g Call Forwarding
Abbreviated dialing
Reverse charging
Unique numbering
5
These services are created by modification of software
in each exchange

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• Service Control Point (SCP).
• Service Switching Point (SSP).
• Service Management Point (SMP).
• Service Data Point (SDP).
• Specialized Resource Point (SRP).( IP)
IN COMPONENTS

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SCP- SERVICE CONTROL POINT
SMP
SCP
C CCS7N
SSP SSP
IP
IP
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7 CCS7
CCS7
X.25
DATA
BASE
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral
• This is a computer
data base
• SCP has the service
logic and subscriber
related data
• SCP is connected to
SSP by CCS7
7

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• Contains the Service Logic Programs(SLP).
• Communicates with SSP on INAP for control of IN calls through
INAP.
• Communicates with SMP for management of Services.
• Communicates with SDP for updation of Database.
• Generates statistical records and CDRs for IN calls handled by
it.
CORE FUNCTIONS OF SCP

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SSP- SERVICE SWITCHING POINT
SMP
SCP
C CCS7N
SSP SSP
IP
IP
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7 CCS7
CCS7
X.25
DATA
BASE
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral
• The subscriber calls are
routed to SSP through
the voice path
• SSP has the capability
to interact with the
database
• Mostly SSP is a
software upgrade of the
existing exchange

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FUNCTIONS OF SSP
• Contains CCF and SSF and in case of LE CCAF.
• Provides Service trigger to SCP in case of IN Call
(identified by SAC).
• IN call handling as per instruction from SCP.
• Transiting of SRP messages from and to SCP.

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• Playing of Announcements as per directive from SCP.
• Collection of User Information through DTMF and decadic
mode and forwarding the same to the SCP.
• In future it may support voice response system , voice
mail boxes, speech recognition system , text to speech
converter.
FUNCTION OF SRP( IP)

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SMP - SERVICE MANAGEMENT POINT
SMP
SCP
C CCS7N
SSP SSP
IP
IP
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7 CCS7
CCS7
X.25
DATA
BASE
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral
• Services are created,
modified and tested
in SMP
• Service logic is down
loaded from SMP to
SCP for execution
• Call statistics are
sent from SCP to
SMP for post
processing

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SMP
• It provides the GUI based man-machine interface for the
purpose of :
– Service Activation.
– Service Deactivation.
– Service Provisioning.
– Service Monitoring.

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IN CALL SETUP 1/4
• User makes an IN call by
a special access code(For
e.g 1800)
• The call is routed to SSP
like normal speech call
• The SSP identifies the IN
call
• A query (CCS7 message)
is triggered (sent) to SCP
SMP
SCP
C CCS7 N
SSP SSP
IP
I P
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7
CCS7
CCS7
X.25
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral

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IN CALL SETUP 2/4
SMP
SCP
C CCS7N
SSP SSP
IP
IP
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7 CCS7
CCS7
X.25
DATA
BASE
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral
• SCP searches its
database and replies SSP
with information asked
for
• SSP switches the call to
the subscriber based on
the information from SCP
• Subscriber disconnects
(either party release)
• Release detected by SSP
15
SMP
SCP
C CCS7 N
SSP SSP
IP
I P
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7
CCS7
CCS7
X.25
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral

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IN CALL SETUP 3/4
SMP
SCP
C CCS7N
SSP SSP
IP
IP
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7 CCS7
CCS7
X.25
DATA
BASE
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral
• SSP prepares the
AMA for sending to
billing centre
• SSP sends call
related data to SCP
• SCP transfers this
information at
periodic intervals to
SMP over X.25 links
16
SMP
SCP
C CCS7 N
SSP SSP
IP
I P
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7
CCS7
CCS7
X.25
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral

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IN CALL SETUP 4/4
SMP
SCP
C CCS7N
SSP SSP
IP
IP
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7 CCS7
CCS7
X.25
DATA
BASE
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral
• SMP does post processing of
call statistics
• In case the call could not be
completed by SSP because
the subscriber is busy or No
reply, SSP asks SCP for
alternate number
• SCP may either provide
alternate number or ask SSP
to connect tones or annc.
17
SMP
SCP
C CCS7 N
SSP SSP
IP
I P
PSTN
USER SUBSCRIBER
Speech
circuit
Speech
circuit
CCS7
CCS7
CCS7
X.25
IN Architecture
SMP- Service Management Point
SCP- Service Control Point
SSP- Service Switching Point
IP- Intelligent Peripheral

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FIXED LINE IN SERVICES
COVERAGE IN BSNL
1. Lucknow - North Zone
2. Ahmedabad - West Zone [FLPP]
3. Kolkata - East Zone [FLPP]
4. Bangalore - South Zone
5. Hyderabad - Mass Calling (All India )
# IP-SRP – 23 Distributed Geographically for announcements

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TYPES OF SCP
•1. GENERAL PURPOSE
– Lucknow,Ahmedabad,Kolkata, Bangalore
– Services offered- Prepaid - ACC,ITC, Call now
– Post-paid –Toll free (FPH), UAN, UPN, PR
– VPN (Mobile & Fixed combined)
•2. MASS CALLING
– At Hyderabad
– Services Offered – Tele-voting, FPH, UAN, PRM, UPN

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IN SERVICE FEATURES
• CFC : Call Forwarding on busy or no answer.
• CPM : Customer Profile Management.
• MAS : Mass calling
• ODR : Origin Dependent Routing.
• TDR : Time Dependent Routing
• OCS : Origination Call Screening.
• OFA : Off Net Access
• ONC : Off Net Calling
• PRMC : Premium Charging.
• PNP : Private Numbering Plan
• REVC: Reverse Charging
• CD : Call Distribution.

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IN SERVICES – PREPAID
•ACC (Account Calling Card)
•Access Code 1804xyz-ABCD (old 1604xyz-ABCD)
• Features
•Pre-paid account
•Account Number & PIN allotted at the time of subscription
•Account can be recharged
•Multiple calls possible using same ACC account (Max. 8)

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IN SERVICES – PREPAID
• ITC (India Telephone Card)
• Access Code 1802xyz (old 1602xyz)
• (Lucknow-180, Ahmedabad-233, Kolkata-345 Bangalore- 425 Hyderabad-
424)
• Features
• Prepaid card which enables subs. to make Local/STD/ISD calls
• - Accessible through all fixed and mobile telephones of BSNL
• - Each card has fixed shelf life of 18 months and variable active
period
• - Follow on feature useful for making multiple calls

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IN-POSTPAID SERVICES
• Why Postpaid IN Services required?
• 1.FPH, UAN, UPN, PRM, Tele-voting
• 2.VPN
• What are possible Tariff for Postpaid Services ?
• 1. Call charges paid by called party
• 2. Call charges paid by calling party
• 3. Call charges shared by calling & called party

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IN SERVICES – POST-PAID
• Free Phone ((FPH)/Toll Free
•Access Code 1800xyz-ABCD (old 1601xyz-ABCD)
•Features
•Single number at all India Level
•Call charges paid by the service subscriber, NO charge to
calling party
•Call routing at multiple/different destination numbers
possible based on origin of call and time of call
•Useful for customer support, Marketing campaigns

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IN SERVICES – POST-PAID
•Universal Access Number(UAN)
•Access Code 1860xyz-ABCD (old 1901xyz-ABCD),
Management-1807xyz
• UAN revenue share-1869424-ABCD (Hyderabad SCP only)

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FEATURES OF UAN
• - UAN Full Charge (0000-4999& UAN Split charge (5000-
9999)
• - Single number at all India Level
• - UAN Split Charge (calling party pays local call rate)
• - UAN Full charge (Calling party pays full charge)
• - Call routing at multiple/different destination numbers
possible based on origin of call and time of call

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UAN MANAGEMENT
a. Dial 1807180 (or xyz)
b. Announcement will be received
“Please enter your universal access number followed by # key”.
c. After dialing universal access number, announcement “Please
enter your PIN followed by # key”.
d. Menu announcements will be received
“ Press 1 to register new
default destination number, “Press 2 to deregister or 3 to
modify your PIN”.

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IN SERVICES – POST-PAID
• Universal Personal Number (UPN)
•Access Code 1868xyz-ABCD, Management- 1808xyz
•Features
•-Similar to UAN with facility to make outgoing calls using UPN
account using management code

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IN SERVICES – POST-PAID
• Premium Number Service (PRM)
• Access Code 1867xyz (old 0900xyz-ABCD)
• Features
• - Useful for information providers who want to charge for their
service like astrologers,share market information, weather forecast
etc.
• -An unique 4 digit number allocated which can be terminated on any
destination number
• -Calls charged at higher than normal call rate and revenue is shared
between service subscriber & BSNL
• -Accessible only through ITC cards only which limits its popularity

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IN SERVICES – POST-PAID
•Virtual Private Network (Voice VPN)
•Access Code 1801xyz[PNP number] (old 1601xyz)
•Features
•-Allows the subscriber to establish the private voice network
using PSTN & Mobile infrastructure
•-A virtual EPABX on all India basis
•-Fixed and Mobile Combined VPN service Launched which
allows the VPN of Fixed lines, Mobile-Prepaid and Mobile-
Postpaid

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VPN DIALING SCHEME
On-net call Dial 1801xyzABC where ABC is the PNP number
Off-net call
a. Dial 1801180.
b. Announcement will be received “Please enter your calling
line number as identity”.
c. On dialing calling line number in international format,
announcement will be received “Please dial your PIN or your
PIN with PNP followed by # key”.
d. On dialing PIN with PNP, call will be routed to desired PNP
number.(on-net call)

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• On dialing only PIN, announcement will be received
“Please dial your PNP number”.
• f. On dialing the outgoing code prefix and then the
required destination number in international format, call
will be routed to
the desired number. (off-net call)
(for Lucknow SCP, outgoing code prefix is 2)

33. For circulation to Trainees only 33
IN SERVICES – POST-PAID
•Tele-voting
•Access Code
1861-424-ABCD-mn (Unit charge) [Old-1902424abcd]
1862-424-ABCD-mn (Two unit charge) [Old-1904424abcd]
1863-424-ABCD-mn (Charge Band) [Old-1903424abcd]
1803-424-ABCD-mn (No charge) [Old-1603424abcd]

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FEATURES OF TELEVOTING
-Mass calling service
-Useful for opinion poll
-The announcement of subs. choice at the time of voting
- Revenue Share between BSNL and Service subscriber

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