1. TIA/EIA-124 (DMH) Background Network Reference Model Record Structure Data Types ASN.1

2. Background Non-Signalling Data Protocol (NSDP) “Move Stuff Between Things” Practical applications: –Fraud detection: Switch  Mediation System  NSDP-F  Fraud Profiler –Real-time billing (e.g. pre-paid billing): Switch  Mediation System  Rating Engine  NSDP-B&S  Billing System –Real-time settlement: Switch  Mediation System  Rating Engine  NSDP-B&S  Settlement Application

3. Network Reference Model CDISCDGPCDCP CDRP IJ K Call Detail Information Source Call Detail Generation Point Call Detail Collection Point Call Detail Rating Point DMH

4. Network Configuration Example CDISCDGP CDCP CDRP CDGP Billing System Serving System SwitchMediation Home System Billing System CDCP Billing App CDGP CDCP Fraud App Fraud Profiler J

5. Record Types Audit Record: call summary Identity Record: who, where, when Leg Record: network, trunk, and feature usage –E.g. Origination, Termination, Feature Activation Segment Record: individual facility usage (air time) Activity Record: radio contact with no duration –e.g. registration, handoff Event Record: event with no radio contact –e.g. authentication, feature activation Charge Record

6. Jackets Call Jacket –Audit, Identity, Charge –Leg (Origination, Termination, Feature Activation, et.al.) –Segment (AirSegment, et.al.) –Activity Activity Jacket –Audit, Identity, Charge –Activity Event Jacket –Audit, Identity, Charge –Event

7. Audit BIN = A1 1 leg 1 seg Leg BIN = A1 leg = 0 Term Segment BIN = A1 seg = 0 Air IncomingTrunkUsage AirChannelUsage ConversationUsage Originating System Anchor System Record 1 2 3 Event:abc Time Record Generation Scenarios: Graphical representation of records generated by events (Section 5.5) Completed Mobile Terminated Call

8. Data Types Integer (e.g. Latitude, Longitude) Positive integer (e.g. AirChannelDuration) Printable string (e.g. PlaceName, StateProvinceName) Digit string (e.g. MIN, IMSI, MDN, Dialed Digits) Bit string (e.g. ServicesUsedIndicator [bit = service used or not]) Octet string (e.g. Date [3 octets – Year, Day, Month]) Enumerated (e.g. Chargeable Indicator [0 = yes, 1 = no]) Null (e.g. LastLegIdentifier, LastSegmentIdentifier) IA5 string (ASCII string – e.g. CellName [alphanumeric])

9. Data Types Constructors –Choice (e.g. Identity Sub-record [ESN or IMEI, MIN or IMSI]) –Sequence (e.g. ServingSWID – SwitchNumber, System- Identifier, BusinessRelationIdentifier, SystemMyTypeCode) –Sequence of Choice (e.g. EventJacket [choose Event- Subrecord or ChargeSubrecord and sequence them if necessary]) –Set (not currently in use – sequence where order doesn’t matter)

10. ASN.1 CCITT X.208 – Abstract Syntax Notation (ASN.1) –“Blue Book” –Open communication system –Variable length data records –Off the shelf compilers plus development tools Section 6.7

11. Basic Encoding Rules CCITT X.209 – Basic Encoding Rules (BER) Identifier –Primitive data type – hex 5F... –Constructor data type – hex 7F... –Section 3.1.6.5 and Appendix K Length Value: Data Type

12. FieldValueTypeReferenceNotes IdentifierAnchorSWID IMPLICITM6.1.3.5 LengthvariableM6.1.3.6 SEQUENCE-6.5.10 SwitchNumber M6.4.183 SwitchIdentifier M6.4.184 BusinessRelationIdentifier O6.4.27a SystemMyTypeCode O6.4.185b FieldValueTypeReferenceNotes IdentifierSwitchNumber IMPLICITM6.1.3.5 Length1 octetM6.1.3.6 Integer(-128...127)M6.5.5 FieldValueTypeReferenceNotes IdentifierSwitchIdentifier IMPLICITM6.1.3.5 Length2 octetM6.1.3.6 Integer(-32768...32767)M6.5.5 Table Format