Intelligent Network (IN)

The subscriber can forward all incoming calls to a specified destination number. Optionally an alerting ring/reminder ring can be given to the forwarding subscriber whenever there is an incoming call.

6) CRD – Call Rerouting Distribution

  • Calls are rerouted as per conditions encountered, e.g. busy or no reply (time specified) or overload or call limiter.
  • Then as per selected condition the call is rerouted to predefined choice, e.g. paper, vocal box, announcement or queue.

7) Completion of calls to busy subscriber

The service cannot be fully implemented with CSI capability since the status of called party need to be known.

  • The calls are completed when subscriber who is busy becomes free.
  • On getting busy tone – user dials a code.
  • The user disconnects.
  • On called party becoming free, call is made by the exchange first to originating then to terminating subscriber (without any call attempt by the user).

8) CON – Conference Calling

The service cannot be fully implemented with CSI capability. In adding or dropping the parties concerned it is not possible to check the authenticity of the parties. This service requires a special transmission bridge to allow conversation among multiple subscribers.

CON-Add-ON-Conference Calling

  • User reserves the CON resources in advance indicating date, time of conference and duration.
  • Controlled by user.
  • In active phase of conference parties can be added, deleted, isolated again reattached or split the group of parties.
  • CON-Meet-ME – Conference calling meet me
  • User reserve the resource same as 8A.
  • Each participant dials a special number at specific time (specified at the time of booking of conference) and reach the conference bridge.

9) CCC – Credit Card Calling

  • The Credit Card Calling service allows subscribers to place calls from any normal access interface to any destination number and have the cost of these calls charged to account specified by the CCC number.
  • A special instrument is not required. The caller has to dial card number and PIN using DTMF instrument.
  • Follow-on feature may be provided optionally.

10) DCR – Destination Call Routing

The call is routed to destination pertaining to following conditions :

  • Time of day, day of week
  • Area of call originating
  • Calling identity of customer
  • Services attributes (non payment charges against subscriber)
  • Priority
  • Charge rates applicable for destination
  • Proportional routing of traffic
  • Optionally the subscribers can be provided with traffic details

11) FMD – Follow me Diversion

  • A subscriber can remotely control the call forwarding capabilities.
  • It can be done from any point in the network using a password.
  • It is required if subscriber moves from place to place in a day.
  • The service subscriber will pay for diverted portion of the call.

12) FPH – Free Phone

  • The called subscriber is charged for active phase of a call.
  • For the calling user, no charging is done.
  • The called subscriber can have multiple destinations and have DCR facility.

13) MCI – Malicious Call Indication

  • The subscriber requests the Administration to register his number for MCI.
  • Administration registers the subscriber for MCI.
  • The called subscriber (who has registered this service) invokes the service during the active phase of the call if he feels that the call is malicious.
  • The call is logged in the network with calling and called party number and Date and time of invoking the service.
  • Optionally, the network can log unanswered calls also.
  • Optionally, the facility to HOLD the connection may be provided.

14) MAS – Mass Calling

  • It involves high volume of traffic.
  • Calls can be routed to one or multiple destinations depending on geographical location or time of day.
  • Mainly used in Televoting.
  • The network operator allots a service number.
  • The user dials this number to register his vote.
  • The user is played an announcement and asked to give his choice.
  • At the end of the service, the network operator provides the call details and the count on various preferences.
  • After the service the same number can be reallocated to another subscriber.
  • Calls made to this MAS number may be charged differently.

15) OCS – Originating Call Screening

  • This helps subscriber to screen outgoing call as per day and time.
  • The screening list may be managed by subscriber.
  • The restriction of screening list may be override by PIN or password. Three call cases are possible :
  • Call screened and allowed
  • Call screened and rejected
  • Call passed by using override option

16) PRM – Premium Rate

  • The local call is charged at a higher (premium) rate.
  • This service is used by service providers for value added information services, e.g. jobs, fortune, forecast, etc.
  • The revenue is shared between network operator and service provider.
  • The network operator allots a specific number to service provider, which can be reached from any point in the network.
  • The provision exists for multiple site provider, in order to achieve minimum expenditure on actual call.

17) SEC – Security Screening

  • This capability allows security screening to be performed in the network before an end user gains access to subscriber’s network, systems or application.
  • It detects the invalid access attempts : how many, over what time period, by whom and from where.
  • It provides an added layer of security.

18) SCF – Selected Call Forwarding (Busy/Don’t answer)

  • This facility is used for a group of 5 to 10 subscribers.
  • A list of SCF is prepared by a subscriber.
  • The list contains the choices as per conditions and calling subscribers of the group.
  • A call from outside the group is forwarded to default telephone number.
  • The variation in SCF list can be done as per time of the day.

19) SPL – Split Charging

  • It allows service subscriber to share the call charges with calling party on per call basis.

20) VOT – Televoting

  • It is used to survey the public opinion by different agencies.
  • The network operator allocates a single telephone number to surveyor.
  • Each time user makes a call he can get access to televoting.
  • An announcement asks him to input further choice digits as per preference.
  • As the user presses the digits the choice counter is incremented.
  • After voting is ceased the service subscriber is supplied the results.

21) TCS – Terminating Call Screening

  • The incoming calls are screened as per screening list.
  • Calls are allowed as per list and time of the day.

22) UAN – Universal Access Number

  • National number is published by the subscriber.
  • The subscriber may specify the incoming calls to be routed to number of different destinations based on geographical locations of caller.

23) UPT – Universal Personal Telecommunications

  • A universal number is defined.
  • Whenever subscriber changes the destination, he inputs that number from telephone.
  • When a call comes, UPT number is translated to actual number.
  • This number can be accessed across various multiple networks, e.g. mobile and fixed.
  • It can be accessed from any user network access.

24) UDR – User Defined Routing Intelligent Network

  • The user is allowed to define the routing of outgoing calls through different network such as private, public, virtual or mixed network.
  • As per time of the day, for example the call is routed to either public or private network whichever is cheaper.
  • For example, outstation calls can have different routes at different times of the day.

25) VPN – Virtual Private Network

  • A private network is built using public network resources.
  • A virtual PABX is created using different switches.
  • A PNP (private numbering plan) can be incorporated on those numbers.
  • Facilities such as CT, CH, dialed restrictions and other supplementary services can be provided within the network.
  • Each line or user is assigned a class of service and specific rights in the network.
  • To access the VPN from outside by one of VPN user, he is required to dial a password.
  • Screening feature can be used to put restriction on outgoing and incoming calls.
  • Call charges are assigned to VPN service subscriber.
  • Additional Account Codes are assigned to service subscriber to analyse the cost line wise.

6  Charging

The IN services can be broadly divided into three categories for charging purposes :

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