Training
Course Outline
Course Duration:
2 days
Training Course Description:
The next generation of telecommunications networks will deliver
broadband data and multimedia services to users. Circuit switched
networks will replaced with IP packet switched infrastructures with
multi-service switching implemented using software control. Streams of
real time media will be switched between gateways under the control of
call servers and media gateway controllers. The key to this new
“soft-switch” technology will be the protocols that run between the
Media Gateway Controllers; this will be H.248 Megaco.
This course will provide developers an introduction to this new
technology, how it has evolved and how it can be used. It will give
and understanding of the commands and parameters used as well as
providing examples of exchanges needed to set-up typical calls.
When you have completed this course you will be able to:
- Describe the structure of
Multi-service networks
- Select the appropriate options for
Media control switching applications
- Implement the commands needed to
setup calls using H.248 Megaco
- Build configurations to describe
media streams using Session Description Protocol
- Select the appropriate encoding
and transport for services
- Use Megaco API commands to set up
calls
Prerequisites:
Delegates should have attended
Multiservice Access and
H.248, or have similar knowledge and experience. Delegates should also
have a very solid understanding of IP, VoIP and WAN technologies.
H.248 Megaco for Developers and
Implementers includes the following modules:
Multimedia Services over Packet Networks
- What counts as multimedia
- Carrying voice over IP
- RTP and RTCP
- Encoding
- H.323 Architecture
- Zones
- Endpoints
- Terminals and Media Gateways
- Media Gateway Controller
- Multipoint Control Unit
- Residential Gateways
- Interfacing to SS7 with Signalling
Gateway
- Trunking Gateways
- H.225, H.245, H.235, H.450
- Evolution of SIP
- Megaco and H.248
Megaco Connection Model
- Contexts and Terminations
- Attributes of a Context
- Creating and deleting contexts
- Multiplexed termination
- Using Contexts and terminations to
build calls
- Identities for Terminations
- Packages
- Termination property Descriptors
- Root Termination
Megaco Commands
- Add
- Modify
- Subtract
- Move
- AuditValue
- AuditCapabilities
- Notify
- Service Change
- Command Descriptors
- Media Descriptors
- Termination State Descriptor
- Logical Control Descriptor
- Local and Remote Descriptors
- Signals Descriptor
- Audit Descriptor
- Service Change Descriptor
- Mapping Numbers
- Digit Maps
- Digit Map Timers
- Digit Map Syntax
- Completion Events
- Digit Map Activation
- Using Wild Cards
- Statistics Descriptor
- Packages Descriptor
- Observed Events
- Topology Descriptors
- Building Conferences with
differing flows
- Isolate, Oneway and Bothway
descriptors
- Error Descriptor
Command Application Programming
Interface
- Add
- Modify
- Subtract
- Move
- Audit Value
- Command Syntax
- Audit Capabilities
- Notify
- Service Change Methods
- Graceful, Forced, Restart,
Disconnected, Handoff and Failover
- Manipulating and Auditing Context
Attributes
- Transactions
Reliable Transport Mechanisms
- Reliable Transport
- Ordering Commands
- Security considerations
- Media Gateway Controller Failure
and Fail-over
- Character encoding of the protocol
transfer
- Binary coding of protocol transfer
- Application Level Framing over UDP
- Providing At-Most-Once
functionality
- Transaction identifiers
- Three-way handshake
- Computing retransmission timers
- Repeating Requests, Responses and
Acknowledgements
- Using TCP
Session Description Protocol
- Describing Media Sessions with SDP
RFC 2327
- Session Timing
- Session Description
- Version, owner, bandwidth
- Time Description
- Media Descriptions
- SDP Example
Basic Packages
- Generic Package
- Base Root Package
- Tone Generator and Detection
- Basic DTMF Generator and Detection
- Call Progress Tones Generator and
Detection
- Analogue Line Supervision Package
- Basic Continuity Package
- Network Package
- RTP Package
- TDM Circuit Package
Example Call Flows
- Call between two Residential
Gateways
- Call between Residential Gateway
to SIP user
- Call using Supplementary Services
Review and Evaluation
View Course Schedule |
