Delegates should have experience or an interest in mobile networks otherwise there are no prerequisites for this course.

Who Should Attend

Attendees of this course should require an understanding of the key voice coders used in modern telecommunication networks, as well as their development and operation. This course will be of particular relevance to those interested in the performance of different speech codecs for optimising voice through the network.


  • One Voice Initiative
  • Commercial Speech Channels - Narrow Band
  • A-D Conversion in the PSTN Access Network
  • Analogue to Digital Conversion
  • Interworking between A-Law and μ-Law
  • Other Types of Voice Coders
  • Voice Coding
  • The GSM Voice coder
  • Subjective Division of Codec Parameters
  • The GSM Half-Rate Speech Coder
  • GSM Enhanced Full Rate Speech Coder
  • AMR (Adaptive Multi-Rate) Voice Codec
  • SCR (Source Controlled Rate) Operation
  • Lost Frame Substitution
  • Codec Output Rates
  • Codecs used in One Net
  • Transcoding
  • SIP (Session Initiation Protocol): Purpose
  • SDP (Session Description Protocol)
  • RTP/AVP Payload Types
  • Real-Time Transport Control Protocol (RTCP)
  • RTCP XR (RTCP Extended Reports)
  • RTCP XR Metrics MOS (Mean Opinion Score)
  • The E-Model
  • Network Factors Affecting Voice Quality
  • Packet Loss in Voice 29
  • CODEC Techniques used to Mitigate Packet Loss

1 Day


This is a QA approved partner course

Delivery Method

Delivery method


Face-to-face learning in the comfort of our quality nationwide centres, with free refreshments and Wi-Fi.

Find dates and prices

Online booking is currently not available for this course, to find out more please call us on 0113 220 7150 or email us at to discuss how we can help.

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