TELECOM
VoIP - Voice Over IP Testing Methods
This course can also be delivered as E-Learning
Nº
1311
DATE: CALL
PRICE NIS: 2540 + VAT
DURATION: 2 Days
DATE: CALL
PRICE NIS: 2540 + VAT
DURATION: 2 Days
Course Overview:
In this seminar we shall discuss the challenges over the IP network, impairments sources and QoS issues. You will learn the main testing standards to evaluate Voice quality. Furthermore we shall find out the main causes for quality degradation over the IP network. In this seminar we shall explore different testing methods: Passive and proactive approaches. In this seminar we shall provide demonstrations for VoIP testing methods and present the Predictive Environment concept for real network simulation.
Who should attend:
QA Engineers, software developer, Technical support and field engineers
Prerequisite:
Basic knowledge of IP Networks and Basic Telephony
Course Objectives
The Participant will be able to:
Course Objectives
The Participant will be able to:
- Identify the network impairments sources
- Define QoS, CoS and QoE parameters;
- Describe the major objective and subjective Voice quality evaluating standards;
- Describe required testing topologies for quality and performance evaluation;
- Describe the predictive environment in the test-bed;
- To plan required tests in conjunction with an ATP document
Course Outline:
Day 1
1. Network Impairments
1. Network Impairments
- Network Impairments description
- The sources of network Impairments
- Correlation between the Impairments
- The need for QoS
- Solutions to provide QoS
- QoS requirements for Triple-Play
- Packet Loss
- Packet Miss-order
- Jitter and Interarrival delay
- Duplicate packets
- Voice quality and Distortion phenomenon
- Infrastructure factors
- IP Network considerations
- Compression effects
- Traffic considerations and calculation models
- Bandwidth calculations
- Erlang and Bandwidth correlation
- Calculations examples
- Testing milestones for deployment process
- Vital parameters to be tested
Day 2
7. Predictive Environment for reliable tests
7. Predictive Environment for reliable tests
- What is Predictive Environment?
- Network testing problems and needs
- Predictive environment profile
- Required features
- Network Impairments recording
- Required Statistics
- Understanding the types of Challenges
- What should be tested?
- Stress tests
- Performance versus quality
- VoIP Simulator and setup process
- VoIP Stress tests
- Results analysis
- About objective speech measurement
- Speech measurement methods: PSQM, PSQM+, PAMS, PESQ, E-Model
- Possible congestion sources
- How to locate these sources
- How to avoid Congestion phenomenon
- Correlation between degradation’s causes
- What is optimization procedure?
- How to implement it?
- Examples
- Voice quality tests
- PAMS and PESQ
- Insertion Loss and Return Loss
- Background Noise
