Telos Zephyr Xstream User Manual page 215

CODEC – Screen 2
Transmit:
The Transmit setting determines what standard (i.e. algorithm) is used to encode the audio to
be sent to the far end. Each mode offers distinct advantages and disadvantages (see section 6.2
for additional information), as follows:
L3 Stereo and L3 J‐Stereo
Until the release of the Zephyr Xstream, MPEG Layer‐3 was the best available
algorithm for sending stereo audio over 2 ISDN B channels. Joint (i.e. Joint
Stereo) should be used for the majority of applications, as it eliminates the
redundant transmission of the center channel information typical in most
source material.
L3 Stereo is appropriate for situations where the audio transmitted will be
subject to playback over Surround Sound systems (i.e. mostly for Television).
Use these Layer‐3 stereo modes if the far end does not support AAC.
This mode offers 15 kHz audio frequency response if the Sample Rate is set to
32 or 16 kHz audio frequency response if the Sample Rate is set to 48 kHz.
USER'S MANUAL
Section 11: THE WORKS – Detailed Menu Reference 203