The students will study introduction to PSTN Telephony and VoIP, about Interworking between PSTN protocols and IP protocols (SIGTRAN), protocols IP: some versions H323, SIP, SIP-T, MGCP, and MEGACO/H248.
● R & D and Marketing staff from companies supplying
telecom equipment
● Marketing and maintenance staff from service
providers
● Communications and plant managers of companies
using telecom equipment and services
● Communications consultants
Knowledge of Telephony network, PSTN, SS#7 and ISDN.
Introduction to Telephony
● Introduction to Telephony
● Introduction to Networks
● Conversion steps of analog signals to digital signals
● PCM-30(E1) ; DS1 (T1)
● Signaling in the telephony systems: CAS/PTS (R2-
MFC) , C.C.S.S.#7
● Introduction to ISDN (BRI/PRI)
IP Telephony
● Introduction
● Traditional Telephony
● Moving towards IP:
- Havdware saving - comparing TDM Network with
Packet Network
- Traffic Management and Trunk Forecasting
• Gateway Decomposition - Motivation:
- Requirements for an Inter - MGC Protocol
- Architecture functions
- Dividing up a gateway
- Call control architecture:
- Interaction with H.323
- MGCP VS IETF
- A few definitions
- Smart works
● IETF Architecture
● Framework for Sigtran and MGS
● IP Connect Protocol Strategy Illustrated:
- Interworking between PSTN and packet telephony
H.323 Introduction
● H.323 - Overview (voice / video / data over ip):
- H.323 - what does it do?
- What is H.323?
- Key Benefits
- IP Connect Strategy – Call Flow
● H.323 Component Descriptions:
- ITU H.323 components and building blocks
- Endpoints, terminals
- General Packet Telepony System.
- Gatekeeper Properties and Gateway Properties
- MCU , MC, MP Characteristics
- H.323 Zone
● Standards:
- Status of H.323 ITU - T Specs.
- H.323 version history
- Supplementary Services
● H.323 Protocol Descriptions:
- H.323 Stack and Communications Protocols
- RAS Protocol ( processes and messages)
- H.225 (Q931) Call Signaling
- H.245 Media Control (processes and messages)
- H.225 RTP and RTCP Protocols
- H.235, H.450, H.341
● Call Signaling Models:
- Channel Routing Options
- Direct Endpoint and Gatekeeper routed Call Signaling
- H.323 Call Walk Through
- Basic Call Flow ( V.1, V.2 ...)
- Fast Connect Call Flow
● Industry Perspective:
- A number of ussues still have to be resolved
- Web sites
● Backup slides
● Abbreviations
SIP & SIP - T Introduction
● SIP Overview:
- Purpose:
- IP Telephony Network (SIP- Based) and PSTN
Transparency
- Next Generation Telephony Network (with sip agents)
● SIP - Session Initiation Protocol:
- Servers and Clients
- Architecture
- Sip / Protocol:
- Message types and format
- SDP
- Addressing and messages
- Examples
● Example Message Flows:
- Call Using Redirect Server
- Call Using Proxy Server
● SIP - T Overview:
- VOIP/PSTN Interconnection Architecture
- SIP-T Call (SIP Bridging); (PSTN to SIP UA); (SIP UA
to PSTN)
- Example SIP-T Message
- Comparison with H.323
● Industry Perspective
● History of SIP–T and status specification work
● Proposed new methods
Introduction to MGCP
● IP Connect Protocol Strategy Illustrated
● Traditional Telephony Network:
- CCSS N #7 overview
● Signaling Gateway Function:
- SS7 SG
- IPS7
- SCTP
- What is Sigtran? And Sigtran Protocols
- SS7/IP Interworking
- IP Connect standards
● Why MGCP?
● IP Connect Solution:
- MGC, MG, AS, QPM, Management, Databases
- Gateway Control Protocol function and history
● MGCP Protocol:
- MGCP Event / Signal Packages
- Endpoint Naming and Packages
- Connections and Calls
- Transactions / Response
- Commands (examples of messages)
● MGCP Message call flow:
- Call Arriving on ISUP TGW
- Residential Gateways
● Interworking between MGCP (IP) and V5.2 (TDM)
● MGCP current status
Megaco (H.248) Introduction
● IETF Architecture
● Framework for sigtran and MEGASO work
● What is MEGASO? SG16? History?
● MEGASO / H.248 – protocol:
- Interworking with SIP, H.323
- Megaco Connection Model (examples)
- Context and Terminations
- Commands, Transactions, Packages
● MEGASO Message Flows:
- Examples
- Call between Residential Gateways
- Comparison with MGCP
● Status H.248 / MEGASO
● Sigtran Status
● Industry perspective
● What next?
● Abbreviations
