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DataKinetics Intelligent networking

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1 DataKinetics Intelligent networking

2 Intelligent Networking
Overview Conceptual models Example services Configuration Programming Interface Programming examples Example program Debugging

3 IN - Introduction The Intelligent Network
Architecture to quickly create and deploy customer SERVICES Supports many services Is a standard - multi-vendor Distributed platform Example services supported by IN Freephone Premium Rate Voice mail Call Diversion Call baring Local Number Portability UPT

4 The pre-IN years... Local switch (service user access point) is monolithic and proprietary Local switch supports switching, call processing and database processing The same functionality may be duplicated between multiple nodes Different implementations create inter-working problems make enhancements complex The network operator is unable to quickly respond to customer requests

5 Pre-IN free-phone service
SSP 800 translation database Special ‘800’ exchange 800 number is translated and forward routed to destination Network routes call (signalling and voice) to special free phone exchange/ server Caller dials free-phone 800 number SSP SSP PSTN Local exchange Local exchange

6 Classic IN physical Architecture
Service Control Point Control and database functions SCEP/ SMP Intelligent Peripheral Play-back announcements X.25 SCP Service Creation Environment Point/ Service Management Point Service administration IP SS7 SS7 SS7 PSTN SSP SSP SS7 Service Switching Point - physical circuit switching

7 Function of the IN SSP Point of subscription for the service USER (this is not necessarily the SUBSCRIBER) IN features Detection of IN calls Generation and transmission of queries a SCP Generate and transmit state information to the SCP (B-party busy, B-party no answer) Record and transmit statistics to the SCP Process SCP requests and replies Service filtering

8 Function of the IN SCP Parameter (service) validation and authentication Process requests from SSP, send responses Call routing, parameter, time, service, subscriber dependant Control IP to play back standard announcements

9 Function of the IP The functionality integrated into a Service Switching Point often provides restricted capabilities only, the main application being targeted towards general announcements. IPs are dedicated to user interaction. They provide high storage capacity together with numerous functions: Standard announcements Information collection via DTMF Speaker independent voice recognition Customized announcements Fast modification/customization of announcements Speaker dependent voice recognition Complex dialogues controlled via internal scripts Provision of conferencing resources (defined in CS-2)

10 Function of the SCEP/SMP
Service Administration Development and introduction of new services Modification of exsisting services Provides a Service Creation Environment (generally a graphical interface)

11 Generalised IN call flow
User communicates with the SSP (dials the called party number). The SSP analyses the number and determines that this is an IN call. The SSP contacts the SCP to determine how the call should continue. The SCP can optionally obtain further caller information by instructing the IP to play back announcements (I.e. to collect PIN). The SCP instructs the SSP on how the call should continue, modifying call data as appropriate to any subscribed services.

12 Simplified IN Call SCP IP SSP SSP
2 & 5. How should the call be processed? IP 4 Announcement 3 & 6. Instructions 1. Off hook and dial number SSP SS7 Network SSP 7. Call progressed through to destination

13 Freephone service Example
SSP SCP Multiple destinations SSP 2,6 3 SSP 1 SSP 4 5

14 Freephone Service 1. Calling party dials the freephone number (e.g ). 2. A trigger set in the SSP causes an INAP query to be sent to the SCP, containing the called and calling party information. On reception of the Query, the SCP translates the freephone number to the ‘best fit’ destination. 3. The SCP sends the destination number back to the SSP and requests return of charging information once the call has completed. 4. The SSP resumes call processing with the new destination address, routing the call over the PSTN. 5. The call is established. 6. After the call is terminated, the SSP sends charging information to the SCP.

15 Televoting service Example
SCP IP 2,5 4 3,6 SSP 1 SSP

16 Televoting example 1. Calling party dials the televoting number.
2. Switch recognises televoting call and sends a query to the SCP. The SCP analyses the dialled number and increments the appropriate vote count. The SCP determines that a prompt indicating successful registration of the vote is required. 3. The SCP sends a routing number of an appropriate IP able to play the televoting announcement. The IP plays the announcement. 4. The IP informs the SSP that the announcement has been played and is complete. 5. The SSP sends the completion status to the SCP 6. The SCP instructs the SSP to clear the call.

17 Televoting service method (2)
SCP IP 1,3 3 4 SSP 2 SSP

18 Televoting service method (2)
1 SCP initiates service filtering (televoting) at the SSP 2 Subscriber dials, SSP informs SCP that the specified service has been activated 3 SCP instructs the SSP to play an announcement (using the IP) and release the call once the announcement has completed. 4 After a specified time, or at specific defined time intervals set when the service was activated, the SSP reports the televote count to the SCP. Steps 2 and 3 may be repeated many times!

19 IN CS-1 Benchmark services
See Q.1219 Annex A for example service flows Abbreviated Dialing (ABD) Attendant (ATT) Authentication (AUTC) Autorisation Code (AUTZ) Automatic Call Back (ACB) Call Distribution (CD) Call Forwarding (CF) Call Forwarding on Busy/Don’t Answer Call Gapping (GAP) Call Hold with Announcement (CHA) Call Limiter (LIM) Call Logging (LOG) Call Queuing (QUE) Call Transfer (TRA) Call Waiting (CW) Closed User Group (CUG) Consultation Calling (COC) Customer Profile Management (CPM) Customized Recorded Announcement (CRA) Customized Ringing (CRG) Destination User Prompter (DUP) Follow-Me Diversion (FMD) Mass Calling (MAS) Meet-Me Conference (MMC) Multiway Calling (MWC) Off-Net Access (OFA) Off-Net Calling (ONC) One Number (ONE) Origin Dependent Routing (ODR) Originating Call Screening (OCS) Originating User Prompter (OUP) Personal Numbering (PN) Premium Charging (PRMC) Private Numbering Plan (PNP) Reverse Charging (REVC) Split Charging (SPL) Terminating Call Screening (TCS) Time Dependent Routing (TDR)

20 Types of IN signalling Between SSPs: To directly control circuit switched connection or exchange information relating to a call that is in progress on a switched circuit (56 or 64kb/s) - Circuit related Between SSP and SCP: To exchange control information, no physical bearer circuit exists between the SSP and SCP. This is non-circuit related or transaction based signalling. Between SSP and IP, and SCP and IP: May be ISUP, INAP or proprietary.

21 Protocol Model SSP IP SCP MTP SCCP TCAP INAP ISUP INAP SCCP MTP TCAP
Note: There may also be an ISDN link between the SSP and IP

22 ISUP To directly control switched circuit channels.
Defines message formats, message sequences.

23 SCCP Signalling Connection Control Part
A ‘thin’ protocol layer allowing data to be exchanged between intelligent entities (sub-systems) through the SS7 network. Provides routing and addressing control. Each entity that communicates using SCCP is identified by its point code and sub-system number (or global title). Communication may be session based (connection oriented SCCP) or connectionless

24 TCAP (or TC) Transaction Capabilities Application Part
Provides a structure for the invocation of operations at remote intelligent entities. An exchange of messages is called a transaction at the SCCP interface and a dialogue at the INAP interface. Unstructured dialogue - non session based, uses TC-UNI messages Structured dialogue - session based, requires BEGIN, CONTINUE, END. INAP uses structured dialog only. Operations and their results are conveyed in ‘components’ within each dialogue.

25 TCAP control state machines
Dialogue handling Establishment, maintenance and close down of dialogues Each dialogue is identified by a dialogue_id. Component handling One state machine per invoked operation on the invoking side Each operation is identified by an invoke_id. Operation timer Controls the duration of a invocation state machine.

26 Communication TCAP & TCAP-User
TC User 1. 1. Single Components (primitives) 2. Collect Components 3. All collected components of one dialog in one message Component Sublayer 2. Transaction Sublayer 3. TCAP message SCCP MTP

27 TCAP dialogue primitives
TC-Begin.Req; TC-Begin.Ind TC-Continue.Req; TC-Continue.Ind TC-End.Req(Basic); TC-End.Ind(Basic) TC-End.Req(Prearranged): Local termination of the transaction TC-User-Abort.Req; TC-User-Abort.Ind: ‘User Information’ informs about abort reasons (normal abort, error indication) TC-Provider-Abort.In: Sent by the transaction sub-layer of TCAP TC-Notice.Ind: Requested SCCP service was not available

28 TCAP component primitives
TC-Invoke.Req / Ind TC-Result.Last.Req / Ind TC-User-Error.Req / Ind TC-User-Reject.Req / Ind TC-Local-Reject.Ind / TC-Remote-Reject.Ind: Errors detected by TCAP: Those errors are indicated to the user. The user decides whether the error shall be sent to the peer entity or not (controlled by sending the respective dialog handling primitive) TC-Cancel.Req: TCAP user requests locally the abort of a previously invoked operation and the cancellation of the related state TC-Cancel.Ind: Indication of an operation timer expiration to the local TCAP user. (Interpretation by the TCAP user depends on the operation class!)

29 IN Conceptual Model Four planes (Q.120x) are used to model and abstract the IN functionality: Q Service Plane (SP) Uppermost, describes services from the users perspective. Hides details of implementation from the user Q Global Functional Plane (GFP) contains Service Independent Building Blocks (SIBs), reusable components to build services Q Distributed Functional Plane (DFP) models the functionality in terms of units of network functionality, known as Functional Entities (FEs). The basis for IN execution in the DPF is the IN Basic Call State Model. Q Physical Plane (PP) Real view of the physical network.

30 SP/GFP Service feature Service Service Plane Global Functional Plane
Q.1212 (Not defined!) One number Reverse charging Global Functional Plane Translate Screen Q.1213 Basic call process Charging SIB

31 SIBs A SIB has the following characteristics:
Exists in the Global Functional Plane. It is a re-useable building block, defining a complete activity. It has a defined interface, with a specified number of inputs and outputs. It is independent of the physical implementation. SIBs are independent of the IN Services. SIBs are combined to implement a Service. CS-1 SIB examples: Authenticate, Charge, Log Call Information, Screen. Some Service Creation Environments operate on SIBs

32 BCP and POI Special SIB called the Basic Call Process (BCP).
This interacts with the other SIBs. The GFP defines the Point of Initiation (POI) and the Point of Return (POR) between the BCP and any other SIB or sequence of SIBs. CS-1 Points of Initiation Call originated Address collected Address analysed Call arrival Busy No Answer Call acceptance Active state End of call CS-1 Points of Return Continue with existing data Proceed with new data Handle as transit Clear call Provide call party handling Initiate call

33 Freephone modeling with CS-1 SIBs
Charge_1 (Calling free of charge) Charge_2 (Record for subscriber) Translate Translate Translate UI SIB Chain 1 SIB Chain 2 SIB Chain 3 SIB Chain 4 POI Address Analyzed POR Proceed with new data POI Busy POR Proceed with new data POI No Answer POR Proceed with new data POI No Answer POR Clear Call BCP Service Features Calling line is set free of charge The service subscriber is to be charged The first call attempt shall be routed to an alternative destination if the first destination is busy or does not answer, i.e. rerouting on “busy” or “no answer” If a re-routed call, i.e. due to “busy” or “no answer” during the first attempt, meets a “no answer” situation then an announcement shall be played to the caller. This means that the “busy” situation shall not be monitored for during the second attempt.

34 GFP/DFP (For CS-1) Global Functional Plane
Q.1213 POI SIB n Basic call process SIB n POR Distributed Functional Plane BCM SCF Q.1214 SSF SDF CCF SRF Functional Entity

35 Functional Entities Basic Call handling Service Execution Functions
Call Control Agent Functions (CCAF) - models the users telephone Connection Control Function (CCF) - basic switching Specialised Resource Function (SRF) - additional media management Service Execution Functions Service Switching Functions (SSF) - interface to SCF Service Control Function (SCF) - service logic Service Data Function (SDF) - service data SRF Service Management Functions System Management Functions (SMF) - service provisioning, maintenance Service Management Agent Functions (SMAF) - MMI for SMF service Creation Environment Function (SCEF) - specification and testing

36 FE and SIB association (CS-1)
SDF Basic Call Process Verify User Interaction Translate Status Notification Service Data Mgt Screen Queue Log Call Information Limit Distribution Compare Charge Algorithm Authenticate SRF SCF CCF/SCF

37 DFP and the Physical Plane
Distributed Functional Plane SCF Q.1214 SRF SDF SSF Functional Entity SCP Physical Plane Q.1215 SDF SSP IP INAP Communication

38 CS1 physical FE distribution
SCP SMAF Voice Transport SCF SMF Signaling IP SDF SCEF Optional FE SMP SDF SRF SDP SN SCF SRF SCF SSF SSF CCF CCF SDF CCAF SDF SRF SSP SS7 Network

39 FE definition of IP and SN
Intelligent Peripheral An IP (Intelligent Peripheral) contains the Specialized Resource Function only, i.e. an IP provides capabilities necessary for services with user dialogues An IP is controlled by the service logic Service Node A Service Node (SN) comprises all functions needed to provide services (Service Control Function, Service Data Function, Service Switching Function, Call Control Function and Specialized Resource Function A Service Node is able to provide complete services independent on other networks components Service Nodes may be also called Intelligent Network in a Box The mentioned functions represent the minimum function set of a Service Node. Obviously there are additional functions useful concerning management, service creation and other areas.

40 Service Node architecture
INAP to SCP MAP to HLR Management SCEF INAP to SSP SCF SDF SSF/ CCF Bearer Control (DSS1 or ISUP) SRF

41 SN features Internal proprietary interfaces between its components
The service logic can directly access the voice channel Besides voice now numerous data communication protocols and applications may be used Flexible, efficient and cheap (good cost performance ratio) implementation of services for small service providers Easy introduction into existing networks based on connection via standard signaling protocols (EDSS1, ISUP) Reduction of #7 signaling load Lower traffic concentration

42 Example SN capabilities
Voice messaging subscribers record own messages which are distributed through the network (according to a distribution list). Fax messaging Record fax messages during busy hour to retransmit during off-peak charing period. Short Message Service Gateway to networks. Electronic mail

43 Service Modelling in the CS-1 DFP
SIBs are modelled in the DFP by interactions between Functional entities. Each SIB is modelled by the SCF controlling other FE’s. The BCP is modelled in the DFP by the Basic Call State Model in the CCF. SIB n Basic call process SIB n SCF CCF SSF SDF

44 The Basic Call State Model
BCSM Standard definition of call processing states and events Switch and manufacturer independent Trigger Detection Points are pre-defined in both the Originating Basic Call State Model OBCSM and the Termination Basic Call State Model (TBCSM) Non-interruptable sequences of processing are called Points-In-Call (PIC)

45 IN Triggers A normal call becomes an ‘IN call’ if a special condition is recognised during the call handling Recognition of such a condition ‘triggers’ a query to an external control component (SCP) Recognition takes place at pre-defined Detection Points in the call handling, which may be armed (active) or not armed (inactive) DPs may be armed statically for a long period to implement a particular IN Service. DPs may be armed dynamically to report particular events and errors.

46 Types of Triggers Two types of processing on satisfying a DP:
Suspend call processing and request instructions Request : TDP_R Continue Call processing and issue Notification to SCF Notification : TDP_N

47 1. O_Null & Authorise Origination_Attempt
CS-1 originating BCSM O_Abandon 1. O_Null & Authorise Origination_Attempt 6. O_Exception 10 Orig_attempt Authorised 1 Point in Call (PIC) 2. Collect_info Collected_info 2 Detection Point (DP) 3. Analyse_info Route_select_failure 4 3 Analysed _info O_Called_party_busy 5 4. Routing_&_alerting O_No_Answer 6 7 O_Answer 9 5. O_Active 8 O_Mid_call O_Disconnect

48 OBCSM Triggers DP1 : Origination_attempt_authorized
Call setup is recognized and authorized. DP2 : Collected_Information Pre-defined number of dialed digits is collected DP3 : Analyzed_Information Dialed digits are analyzed DP4 : Route_Select_Failure Routing failed : no free channel, dialed number not available, network overload DP5 : O_Called_Party_Busy Destination busy DP6 : O_NO_Answer Caller does not answer in predefined time, Service Logic specifies the “no answer time” for SSP DP7 : O_Answer Called subscriber answers: SSP receives e.g. an ANM DP8 : O_Mid_Call Signal (hook flash, F-key) recognized during call DP9 : O_Disconnect A or B side hangs up DP10 : O_Abandon Call set-up discontinued by the A-side

49 CS-1 Terminating BCSM 7. T_Null & Authorise termination attempt
T_Abandon 7. T_Null & Authorise termination attempt 11. T_Exception 18 Term_attempt Authorised 12 T_Called_Party_busy Point in Call (PIC) 8. Select Facility & Present Call 13 Detection Point (DP) T_No_Answer 14 9. T_Alerting T_Answer 15 17 10. T_Active 16 T_Mid_call T_Disconnect

50 TBCSM Triggers DP12 : Termination_attempt_authorized
an incoming call attempt is recognized and authorized DP13 : T_Called_Party_Busy Destination busy DP14 : T_No_Answer Called party does not answer during a given time DP15 : T_Answer Called line answers, I.e. the SSP receives the ANM DP16 : T_Mid_Call Signal (e.g. hook flash, function key) is recognized during the active connection DP17 : T_Disconnect Either A-side or B-side hangs up DP18 : T_Abandon Call set-up aborted by the A-side, can happen at any time and is considered normal

51 Information Flows Two methods exsist for requesting SCF processing at a DP: DP Generic Only one information flow is used, ‘Initial DP’. The set of information elements (data) carried depends on the DP encountered. DP Specific Dedicated information exchange for each DP. Easy to process, less paring effort. High number of different information flows to analyse. (Not specified for use in ETSI INAP).

52 Freephone Example 2 3 7 9 SSF SCF SDF TDP-R Analyse_info Route_&_Alert
Initial DP: fph, xxxxxx 2 TC-BEGIN Connect: call, id = xxxxx Req BCSM event: O_Answer, O_Disconn Analyse_info 3 TC-CONTINUE Route_&_Alert Event: call, id = xxxxx BCSM O_Answer, time EDP-N 7 TC-CONTINUE O_Active Event: call, id = xxxxx BCSM O_Disconnect, time 9 TC-CONTINUE EDP-N TC-END

53 Operation: Initial DP Semantics: Arguments: Report a trigger detection
Establishes a control relationship between SSF and SCF Arguments: serviceKey calledPartyNumber callingPartyNumber bearerCapability redirectingPartyId …..

54 Operation: Connect Semantics Arguments:
Transfer the determined destination number to the SSF Continue the call set-up Arguments: destinationRoutingAddress calledPartyNumber callingPartyNumber redirectingPartyId cutAndPaste ...

55 Parameter: Cut and Paste
Describes how the digit string should be processed. The Cut&Paste value instructs the SSP to remove the first “Cut&Paste” digits from the dialed digits. The digits received from the SCP then serve as the leading digits of the destination address which has to be formed. The digits already existing at the SSP will be added at the end Example: SSP receives “ ” SCP instructs CutAndPaste = 4 and destination address = SSP generates destination address

56 Operation: RequestReportBCSMEvent
Semantics: arming of event detection point at the SSP for call monitoring Arguments: list of elements of type BCSMEvent Example: DP5 ( = busy) DP6 ( = no answer) ….. Specify DP specific conditions/parameters. (e.g. timer for DP6)

57 Operation: EventReportBCSM
Semantics Reporting of detected event detection points Arguments: eventTypeBCSM eventSpecificInformationBCSM legID

58 INAP Allows communication between distributed IN Functional Entities.
Information flows defined in the DFP are implemented in the physical plane through the SS7 INAP protocol. INAP is defined on a FE basis rather than a physical view. INAP supports interactions between: CCF/SSF and SCF SCF to SRF INAP operations are grouped into Application Service Elements (ASE’s). An ASE may be considered as being a collection of operations.

59 Capability Sets Capability Set = set of supported services and service features CS-1 Single ended/single point of control services, defined by Q.121x. Single party (originating or terminating) controls the INAP call. CS-2 Enhancement to all CS-1 structure. Defined by Q.122x. Capability for multi-point control.

60 Protocol layers MTP Layer 1 MTP Layer 3 MTP Layer 2 TUP SCCP ISUP TCAP
INAP MAP Application

61 Application Contexts Application Service Elements are grouped into Application Contexts (AC’s). An AC is typically a sub-set of the total INAP and specifies the parts of the protocol needed in the communication between two type of IN FE’s. An AC also defines which operation should initiate the dialogue. Example Application Contexts: “IN-CS-1-SSF-to-SCF-Generic-AC” SCF-activation-ASE, Connect-ASE “IN-CS-1-SCF-to-SSF-status-reporting-AC Status-reporting ASE, Cancel ASE

62 DataKinetics INAP, Key Features
Provides the INAP communication capability for the SCF, SSF or SRF. FE independent. Implements the Single Association Control Function (SACF) defined in ITU-T Q.1218 and ETS Procedural API interface. Tailored Suites of ASE’s (INAP operations) Supported ASE’s may be tailored to support any network or operator specific IN functions. Supports application context negotiation Supports operation with ITU-T/ETSI and ANSI TCAP.

63 Documentation Platform User Guide (Septel cP, PCCS6, SIU)
Software Environment Programmer’s Manual SCCP Programmer’s Manual TCAP Programmer’s Manual INAP Programmer’s Manual

64 Programming Interface
INAP is based on invoking an operation at a serving FE by the requesting FE. These operations are invoked within a session or “dialogue” between the two FE’s. Functional API library supplied with a procedural interface manages parameter Encoding/decoding as TCAP components, using ASN.1 rules. To access the ASN.1 encoded data, the user may access the module directly. (Using MSGs).

65 Functional Entity Addressing
When a dialogue is opened, the user application must supply the SCCP address of the local and remote FE’s in the SS7 network. These can be included at the start of each dialogue or configured once (at initialisation) and referenced by a local logical code. Enables INAP to support more than one local FE. (Hence a SCF and SRF may be implemented on the same stack). Each local FE may be handled by a different user task (module_id).

66 Application Context Handling
An Application Context (AC) is required for each dialogue between two IN FE’s. AC negotiation is required at dialogue initiation to determine if the receiving FE is able to support the requested AC. The INAP module can be configured to handle the AC negotiation automatically if the supported AC’s are configured. If required, raw AC data may be exchanged between the INAP module and the user allowing the user to perform the AC negotiation.

67 Module Capability Maximum number of FE’s = 32
Maximum number of AC’s = 32 Maximum number of simultaneous dialogues = 2048 Maximum number of simultaneous invocations = 2048 Supports all ETSI CS-1 Core INAP ACs’: Core-INAP-CS1-SSP-to-SCP-AC Core-INAP-CS1-ASSIST-HANDOFF-TO-SSP-TO-SCP Core-INAP-CS1-IP-TO-SCP Core-INAP-CS1-SCP-TO-SSP-TRAFFIC-MANAGEMENT Core-INAP-CS1-SCP-TO-SSP-SERVICE-MANAGEMENT Core-INAP-CS1-SSP-TO-SCP-SERVICE-MANAGEMENT

68 INAP Configuration Single message, INAP_MSG_CONFIG Septel-SIU
user_id default application module id if no FE’s configured TCAP_id module id used by TCAP (normally 0x14) mngt_id, maint_id Module id for management and maintenance event indications trace_id Module id for traced messages (debug only) base_usr_ogdlgid 1st dialogue id that will be used by the user for outgoing dialogues base_usr_icdlgid 1st dialogue id that will be used by INAP for incoming dialogues base_tc_ogdlgid 1st outgoing dialogue id to send to TCAP base_tc_icdlgid 1st incoming dialogue id expected from TCAP nog_dialogues maximum number of outgoing dialogues to support nig_dialogues maximum number of incoming dialogues to support num_invokes maximum number of active invokes (operations) to support options ANSI or ITU-T component formats, Transparent AC handling, 14 or 24 bit point codes Septel-SIU Set SCCP_LSS <protocol> to INAP

69 FE Configuration Single message per FR, INAP_MSG_CNF_FE Septel-SIU
fe_reference (0..31). Logical identifier unique to each configured FE FE options Local or Remote Local FE module ID Module ID identifying the user application process handling the local FE FE SCCP address length number of octets of data in the lFE SCCP address FE SCCP Address FE address formatted according to Q.713, ANSI T1.113 Septel-SIU INAP_FE <fe_ref> <options> <fe_addr>

70 AC Configuration Single Message per AC, INAP_MSG_CNF_AC Septel-SIU
application context reference logical identifier referencing the supplied AC. ac_len number of octets of data in application context. Application Context AC data Septel-SIU INAP_AC <ac_ref> <ac>

71 Complete configuration sequence
Configure Physical parameters (PCCS6) Configure MTP3 parameters (links, link sets) Configure SCCP Configure SCCP Remote Signalling Points Configure SCCP Remote sub-systems Configure SCCP Local sub-systems Configure INAP Configure INAP FE’s (optional) Configure INAP AC’s (optional)

72 Example configuration
sub-system number = 0x0c module_id = 0x1d FE identifier = 5 sub-system number = 0x0a FE identifier = 1 Point code = 1 Local Remote Point code = 2 sub-system number = 0x0d module_id = 0x2d FE identifier = 5 sub-system number = 0x0b FE identifier = 2

73 Example INAP configuration (1)
* Issue configuration message to the SCCP module: * maint_id * mod_id SMB flags * options pc --SMB id * sio mgmt_id SCCP inst * ver mtp_id max_sif M-t7740-i0000-fef-d33-r8000-p e9e * * Configure Local sub-systems * mult_ind * mod_id * type ssn * ver spc M-t7741-i0000-fef-d33-r c M-t7741-i0000-fef-d33-r8000-p d * Configure Remote SP's M-t7741-i0000-fef-d33-r8000-p * Configure Remote sub-systems M-t7741-i0000-fef-d33-r8000-p a M-t7741-i0000-fef-d33-r8000-p b

74 Example INAP configuration (2)
* Issue configuration message to the TCAP module: * mgt_id max_data---- * nsap_id nicd nseq * usr_id nogd bog --ndref * mod_id ----flags ncpt --ninst * ver maint_id ninv bic --inst M-t7780-i0000-fef-d14-r8000-p e9e ff0 * * Issue configuration message to the INAP module: * base_tc_icdlg_id * reserved----base_tc_ogdlg_id * trace_id options * Tcap_id base_usr_icdlg_id * user_id base_usr_ogdlg_id num_invokes * maint_id nic_dlg * mgmt_id nog_dlg M-t77f4-i0000-fef-d35-r8000-p77149e9e9e

75 Example INAP configuration (3)
* Config Remote Functional Entites * addr * addr len * local FE module id * FE options M-t77f7-i0001-fef-d35-r8000-p a M-t77f7-i0002-fef-d35-r8000-p b * * Config Local Functional Entites M-t77f7-i0005-fef-d35-r8000-p00011d c M-t77f7-i0006-fef-d35-r8000-p00012d d * Config Application Contexts * AClen * reserved AC M-t77f6-i0000-fef-d35-r8000-p ba M-t77f6-i0001-fef-d35-r8000-p ba M-t77f6-i0002-fef-d35-r8000-p ba M-t77f6-i0003-fef-d35-r8000-p ba M-t77f6-i0004-fef-d35-r8000-p ba M-t77f6-i0005-fef-d35-r8000-p ba M-t77f6-i0006-fef-d35-r8000-p ba

76 Example INAP configuration (4)
* * Send UIS (to SCCP), ssn = 0x0c and 0x0d : * SSA M-tc744-i000c-fef-d33-r8000-p M-tc744-i000d-fef-d33-r8000-p Sub-system status is maintained by SCCP, hence all sub-system management requests are made to SCCP and are received from SCCP (module_id 0x33)

77 Message based API Receive dialogue event Issue dialogue command
Receive results or errors from operations invoked at a remote FE Invoke an operation at a remote FE or respond to a invocation received from a remote FE Usage 0x87f3 0xc7f2 0x87f1 0xc7f0 Value INAP_DIALOGUE-IND INAP_DIALOGUE_REQ INAP-SERVICE-IND INAP-SERVICE-REQ Message type

78 INAP_MSG_DLG_REQ INAP Programmers Manual details other message specifications

79 Dialogue primitive types
INAP User to INAP

80 Dialogue primitive types
INAP to INAP User

81 Dialogue parameters The INAP Programmers Manual defines the parameters and which are required with each primitive type M Mandatory O Optional A Exclusive OR B Exclusive OR C Conditional

82 Service component primitives
INAP User to INAP

83 Service component primitives
INAP to INAP User

84 Service component parameters

85 Pre-defined operation codes
/* * SCF activation ASE */ #define INOP_InitialDP (0) * Basic BCP DP ASE (ITU Q.1218 only) #define INOP_OriginationAttemptAuthorized (1) /* (ITU Q.1218 only) */ #define INOP_CollectedInformation (2) /* (ITU Q.1218 only) */ #define INOP_AnalysedInformation (3) /* (ITU Q.1218 only) */ #define INOP_RouteSelectFailure (4) /* (ITU Q.1218 only) */ #define INOP_OCalledPartyBusy (5) /* (ITU Q.1218 only) */ #define INOP_ONoAnswer (6) /* (ITU Q.1218 only) */ #define INOP_OAnswer (7) /* (ITU Q.1218 only) */ #define INOP_ODisconnect (8) /* (ITU Q.1218 only) */ #define INOP_TermAttemptAuthorized (9) /* (ITU Q.1218 only) */ #define INOP_TBusy (10) /* (ITU Q.1218 only) */ #define INOP_TNoAnswer (11) /* (ITU Q.1218 only) */ #define INOP_TAnswer (12) /* (ITU Q.1218 only) */ #define INOP_TDisconnect (13) /* (ITU Q.1218 only) */ * Advanced BCP DP ASE (ITU Q.1218 only) #define INOP_OMidCall (14) /* (ITU Q.1218 only) */ #define INOP_TMidCall (15) /* (ITU Q.1218 only) */ See in_inc.h

86 Functional API Message buffer handling functions
IN_alloc_message Allocate a message to send to INAP IN_free_message De-allocate message IN_send_message Send message to INAP Component Handling IN_init_component Used to initialise component encoding/decoding. Must be called before encoding or decoding a component. Allows the user to specify the protocol (encoding format). Parameters are detailed in the INAP Programmer’s Manual

87 Component encoding CPT 1. Initialise Component 3. Service Request
Encoding Functions 2. Component Building Functions MSG

88 Component building functions
Build Operation in Component Buffer API Functions IN_set_operation Write the operation code IN_set_error Write the error code IN_set_result Write the result IN_set_component_param Write the requested parameter All the above functions operate on the component buffer, which must be subsequently formatted into a message

89 Service request encoding
IN_code_operation_invoke Encode the component in an Invoke component IN_code_result Encode the component in a Result component IN_code_error Encode the component in an Error component IN_code_reject Encode the component in an Reject component

90 Component decoding CPT 1. Initialise Component 3. Read Component
Buffer Functions 2. Decode Service Indication Functions MSG

91 De-code service indication
IN_get_component_type Obtain received component type IN_decode_operation Decode the operation parameter IN_decode_result Decode a result IN_decode_error Decode an error component

92 Read component buffer IN_get_component_type Return the type of the received component IN_get_component_first_error Determine the first error encountered during encoding IN_get_operation Get received operation code IN_get_component_param Retrieve parameter from received component

93 Dialogue handling API functions
Send dialogue request API functions IN_set_dialogue_param Set a dialogue request parameter IN_dialogue_open Builds a dialogue open IN_dialogue_close Builds a dialogue close IN_dialogue_delimit Builds a dialogue delimit IN_dialogue_u_abort Builds a dialogue u_abort IN_dialogue_open_rsp Builds an open response dialogue primitive Read dialogue request API functions IN_get_dialogue_type Determine dialogue type in received message IN_get_dialogue_param Recover a parameter from a received dialogue

94 Outgoing dialogue request
INAP User INAP TCAP SCCP MTP INAP_DLG_REQ (OPEN) INAP_SRV_REQ (INVOKE) TC-INVOKE INAP_DLG_REQ (DELIMIT) TC-BEGIN N-UNITDATA-REQ UDT UDT INAP_DLG_IND (OPEN-RSP) TC-CONTINUE N-UNITDATA-IND INAP_SRV_IND (INVOKE) TC-INVOKE INAP_DLG_IND (DELIMIT) INAP_DLG_IND (CLOSE) TC-END

95 Opening a dialogue Obtain a message structure, enter the parameters and send to INAP. No message is issued to the SS7 network at this point. h = IN_alloc_message(); IN_set_dialogue_param(INDP_dest_address, len, dptr, h); IN_set_dialogue_param(INDP_orig_address, len, dptr, h); IN_set_dialogue_param(INDP_applic_context_index, len, dptr, h); IN_dialogue_open(dlg_id,h); IN_send_message(user_id,inap_id,h);

96 Sending an operation This may only be done on an opened dialogue. The user obtains a message, initialises a component structure and sent to the INAP module. h = IN_alloc_message(); IN_init_component(prot_spec, cpt); IN_set_operation(op_name, timeout, cpt); IN_set_component_param( INPN_InvokeID, len, dptr, cpt); IN_set_component_param( param1, len, dptr, cpt); IN_set_component_param( param2, len, dptr, cpt); IN_code_operation_invoke( dlg_id, cpt, h); IN_send_message(user_id, inap_id, h);

97 Sending a delimit This is built and sent in a similar method as the Open. h = IN_alloc_message(); IN_dialogue_delimit(dlg_id,h); IN_send_message(user_id,inap_id,h);

98 Receiving an Open Response
This is achieved by reading a message from the applications message queue using GCT_receive. h = GCT_receive(); switch (h->type) { case INAP_MSG_SRV_IND : ... break; case INAP_MSG_DLG_IND : IN_get_dialogue_type(h, dlg_type_ptr); switch (dlg_type_ptr) case INDT_OPEN_RSP: IN_get_dialogue_param(INDP_result,lenptr,dptr,max_len,h); IN_get_dialogue_param(INDP_refuse_rsn,lenptr,dptr,max_len,h); IN_get_dialogue_param(INDP_applic_context,lenptr,dptr,max_len,h); /* Process the parameters here */ } } relm(h);

99 Decoding an operation This is achieved in the same way as recovering the dialogue open response, with a message type indicating a service indication. h = GCT_receive(); switch (h->type) { case INAP_MSG_SRV_IND : IN_get_component_type(h, &cpt_type); switch (cpt_type) case INCPT_INVOKE : IN_init_component(prot_spec, cpt); IN_decode_operation(cpt, h); IN_get_component_param(param1, lenptr, dptr, buffer_size, cpt); IN_get_component_param(param2, lenptr, dptr, buffer_size, cpt); /* Process Invoke parameter here */ break; } ... relm(h);

100 Closing a dialogue The Close request is sent to end the dialogue with the remote system (this may be pre-arranged or basic). m = IN_alloc_message(): IN_dialogue_close(dlg_id,m); IN_set_dialogue_param(INDP_release_method, len, dptr, m); IN_send_message(user_id,inap_id,m);

101 Other examples The INAP Programmers Manual Provides more API examples and message sequence charts.

102 Debugging Message tracing Software events Maintenance events
* Activate Output Event - Trace Mask * non_prim_mask * ip_evt_mask * op_evt_mask M-t57fb-i0000-fef-d35-r8000-p f f f * * Active Error Event Mask M-t57fc-i0000-fef-d35-r8000-pff ff * Active Maintainence Event Mask M-t57fd-i0000-fef-d35-r8000-p

103 INTU example program INTU INAP DLG-IND (OPEN) TC-BEGIN
SRV-IND (Invoke: Initial DP) TC-INVOKE DLG-IND (Delimit) DLG-REQ (OPEN-RESPONSE) TC-INVOKE SRV-REQ (Invoke:Connect) DLG-REQ (DELIMIT) TC-CONTINUE DLG-REQ (CLOSE) TC-END (pre-arranged) (pre-arranged end) DLG-IND (CLOSE)

104 INTU console H:\SYSTEM7\RUN>intu -b0x8000
INTU: Example INAP application (C) DataKinetics Ltd ============================================================= SS7-INAP-API Version 1.1 INTU module ID - 0x3d INAP module ID - 0x35 Number of dialogues - 0x0800 (2048) Base dialogue ID - 0x8000 Options set - 0x0300 INTU: State change for dialogue 0x8000 from IDLE to OPEN INTU: Dialogues: Active [1], Completed [0], Successful [0], Failed [0] INTU: State change for dialogue 0x8000 from OPEN to PENDING_DELIMIT INTU: State change for dialogue 0x8000 from PENDING_DELIMIT to CLOSING INTU: State change for dialogue 0x8000 from CLOSING to IDLE INTU: Dialogues: Active [0], Completed [1], Successful [1], Failed [0] INTU: State change for dialogue 0x8001 from IDLE to OPEN INTU: Dialogues: Active [1], Completed [1], Successful [1], Failed [0] INTU: State change for dialogue 0x8001 from OPEN to PENDING_DELIMIT INTU: State change for dialogue 0x8001 from PENDING_DELIMIT to CLOSING INTU: State change for dialogue 0x8001 from CLOSING to IDLE INTU: Dialogues: Active [0], Completed [2], Successful [2], Failed [0]

105 INTU - notes The received service key is checked to determine if it matches a pre-set value If the key matches, the service logic performs a number translation (from one known number to another) on receipt of the DELIMIT. If the called party address is not recognised, a ReleaseCall will be sent.

106 ITU-T IN specifications
Structure Q.1200 Principles Q.1201 Service plane Q.1202 Global Functional Plane Q.1203 Distributed Functional Plane Q.1204 Physical Plane Q.1205 General Aspects Q.1208 Vocabulary of terms Q.1290 INCM Structure Q.1210 Introduction Q.1201 CS-1 GFP Q.1213 CS-1 DFP Q.1214 CS-1 PP Q.1205 General Aspects Q.1218 User Guide Q.1219 CS-1 Structure Q.1220 Introduction Q.1221 CS-2 GFP Q.1223 CS-2 DFP Q.1224 CS-2 PP Q.1225 General Aspects Q.1228 User Guide Q.1229 CS-2 CS-2 Service plane Q.1221

107 ETSI IN specifications
ETS ETSI Core INAP Part 1 ETS ETSI Core INAP Part 2 ETS ETSI Core INAP Part 3

108 Further reading ITU-T Q.1219
‘The Intelligent Network’ Uyless Black, ISBN , Prentice Hall. ‘The Intelligent network Standards, Their Application to Services’ Igor Faynberg, Lawrence R. Gabuzda, Marc P. Kaplan, Nitin J. Shah ISBN McGraw-Hill DataKinetics INAP Programmer’s Manual


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