CAMEL Operations and Parameters

“CAMEL Operations & Parameters” is an advanced technical course covering details of signalling procedures related to Customized (Customised) Applications for Mobile network Enhanced Logic (CAMEL) based Mobile Intelligent Network (MIN) services. In practice CAMEL Phase 2, sometimes enhanced with a limited support of Phase 3 GPRS Pre-Paid Service (PPS) is absolutely dominating standard MIN solution in existing networks. Most probably, the existing MINs are never going to be upgraded towards higher CAMEL Phases due to the common trend towards alternative solutions based on SIP IMS Application Servers and Diameter based On line and Off-line Charging System (OCS/OFCS). Hence to better the course effectiveness the course is not going beyond the set of operations available in CAMEL Phase2 and CAMEL Phase 3 limited to GPRS PPS.

Target audience

The training presents the knowledge useful for those who in their everyday work operate, maintain and/or supervise CAMEL based Mobile Intelligent Network (MIN) services in a GSM/UMTS CS network.

Training contents

  • Introduction
    (CAMEL Phases, 3GPP and GSMA/IREG reference documents, service examples),
  • Architecture and subscriber data
    (mobile-to-mobile call scenario with international roaming and with/without optional routing, functional entities: HLR, GMSC, MSC/VLR, gsmSCF, gsmSSF, gsmSRF, CAP and MAP based interfaces, MAP operations supporting CAMEL subscriber data management and USSD, detection points, CAMEL subscription data: O-CSI, T-CSI, U/UG-CSI, SS-CSI, TIF-CSI, Basic Call State Model: O-BCSM, T-BCSM, BCSM modelling of call scenarios),
  • Overview of SS7 transport services for CAP and MAP
    (classical SS7, routing on MTP3 and SCCP level, SS7 over IP – SIGTRAN, routing on M3UA level, load sharing, sequence control, TCAP dialogues),
  • Mobile Originated Call
    (location update and O-CSI, BCSM, triggering detection points and service triggering, Initial DP operation and parameters),
  • Mobile Terminated Call
    (HLR interrogation and T-CSI, BCSM, triggering detection points and service triggering, Initial DP operation and parameters),
  • Call Handling
    (Connect, Continue, Release Call operations and parameters, usage examples),
  • Monitoring of calls
    (Arming, disarming and reporting event BCSM detection points, Request Report BCSM Event, Event Report BCSM, Call Information Request, Call Information Report operations and parameters, usage examples),
  • CS charging
    (Apply Charging, Apply Charging Report, Furnish Charging Information, Send Charging Information operations and parameters, usage examples),
  • SRF interactions - announcements and user dialogues
    (Connect to Resource, Play Announcement, Prompt and Collect User Information, Assist Request Instructions, Specialised Resource Report, Establish Temporary Connection, Disconnect Forward Connection operations and parameters, usage examples),
  • GPRS charging (optional)
    (Initial DP GPRS, Connect GPRS, Continue GPRS, Apply Charging GPRS, Apply Charging Report GPRS, Event Report GPRS, Cancel GPRS, Entity Released GPRS, Furnish Charging Information GPRS, Release GPRS operations and parameters, usage examples).


Practical experience in GSM/UMTS is recommended.

Training method

Lectures and exercises with various real CAMEL traces analysis. Additional traces submitted by the client before the training or provided in-real time on site are welcome.


2 days