BR4 - Appliance User Manual v2.0
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1.1. Echo cancellation module
Echo cancellation module installed in BR4 - Appliance
To ensure carrier grade voice quality, BR4 - Appliance can accept an
optional line echo cancellation module based on G.168 standard.
Echo cancellation is a process of removing the echo from a voice
communication in order to improve voice quality on a telephone call. In general
there are two sources of echo in the telephony: Acoustic echo and echo from the
analog phone hybrids.
Speech compression techniques and digital processing
delay often make these echoes more severe in telephone networks.
To achieve consistent quality we have selected
hardware
based solution from
Zarlink. There is a special connector inside the BR4 - Appliance, where user can
plug an optional LEC module. If you have
LEC-64-BR4
installed in your BR4 –
Appliance it will be detected and configured automatically.
