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Total H.248 for engineers  |    A 2 day training course

Total H.248 training course description

A course focusing purely on the H.248 protocol. Anyone working through the ITU standards documents can testify to the need of a training course to explain how H.248 really works. This course already assumes knowledge of other VoIP protocols and starts by positioning H.248 in relation to the other protocols. The course then looks at H.248 architectures and concepts before analysing H.248 messages and call flows.

What will you learn
  • Describe what H.248 is
  • Recognise where H.248 fits in relation to other VoIP protocols.
  • Explain how H.248 works.
  • Analyse H.248 packets
Total H.248 training course details

Total H.248 training course contents

  • What is H.248?
  • Review of VoIP protocols: RTP, RTCP, SIP, SDP, H.323. The PSTN and SS7. Where H.248 fits into the picture. H.248 history. MGCP. The IETF. Megaco. ITU standards. H.248v1, v2, v3.

  • H.248 architectures
  • Media Gateways, Media Gateway Controllers, Gateway Control functions, Signalling Gateways. Reference architectures: IMS/TISPAN: IBCF, IWF, I-BGF, SPDF. MSF: S-SBG-NC, D-SBG-NC. GSMA: IPX Proxy. Softswitches.

  • H.248 concepts
  • The connection model, terminations, streams, contexts. Termination properties: descriptors, context properties. Events, signals, packages.

  • H.248 messages
  • Protocol stack, UDP, TCP. Message structure. Transactions, actions, commands. Requests, replies, acknowledgements. Sample message flows. Binary encoding, ASN syntax, Text encoding.

  • H.248 commands
  • Termination manipulation: Add, Subtract, Move, Modify. Event reporting: Notify. Management: AuditCapability, AuditValue, ServiceChange.

  • H.248 Descriptors
  • What are descriptors? Relationship with messages and commands. Basic descriptors, Descriptors composed of other descriptors. The 19 descriptors. Defaults.

  • H.248 Transactions
  • Groups of commands, transaction Ids, relationship with actions and commands. Requests and replies.

  • H.248 wrap up
  • What is a package? Basic packages. H.248 security. H.248 – SIP interoperation. H.248 interoperation with other protocols.

Learning path



Based on overall ratings

R. C. - NetDev

"Enjoyable course, good week. Clarified things very well for me."

R. L. - Geant

"Very good with deep product knowledge."

Training approach

This structured training course seeks to build upon workbook learning through the use of group exercises, dynamic discussion and individual tasks in order to deliver an engaging and interactive module that will ensure all candidates are able to transfer their new skills into the workplace.