Prodys PortaNet User Manual page 123

This option is only available from the PortaNet web Page:
This option is very useful for an 64kbps ISDN link, where sending a stereo signal could involve a
lack in the audio quality. Thus, encoding L+R signal, as a mono signal, will provide a much better
audio quality. The diagram below explain this:
L
ENC
R
STE
L
L+R
+
R
PortaNet User Manual
ISDN
ENC
RDSI backup
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MN
IP
X21
L
DEC
R
STE
L+R
DEC
MN
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