ProntoNetLC User Manual
112
VI.2 Configuration parameters that are dependant on the
network type selected
There are two fundamental reasons for which the user must change the
ProntoNetLC configuration parameters when a new communications interface is
selected:
The available bandwidth over the selected network (IP, ISDN or X21). This
places limitations on the bit-rate that can be selected and the amount of
compression. As an example: over ISDN it is not possible to send
uncompressed audio and the maximum bit-rate for any algorithm is 128Kbps.
The number of available channels: Number of bidirectional communications
which can be achieved. Note that over ISDN and IP, up to two independent
mono communications can be achieved.
The following table shows what the differences between the various
communications networks regarding ProntoNetLC operation:
NET ALGORITHM BIT RATES (Kbps) Nº
CHANNELS
PCM 16 bits @ 48 KHz.
G711 64
G722 64
MPEG1,2 LII 64,128,192,256,384
MPEG1,2 LIII 64,128,192,256
MPEG AAC LC.LD 64,128,192,256,384
MPEG 4 AAC HE 24,32,48,56,64,128
IP
aptX
TM
64,128,192,256,384,576
2 Mono
30
or
1 Stereo
G711 64
G722 64
MPEG1,2 LII 64,128
MPEG1,2 LIII 64,128
MPEG 2,4 AAC LC 64,128
MPEG 4 AAC LD,HE 64,128
ISDN
aptX
TM
64
2 Mono
or
1 Stereo
G722 64
MPEG1,2 LII 64,128,192,256,384
MPEG1,2 LIII 64,128,192,256
MPEG AAC LC,LD 64,128,192,256,384
MPEG 4 AAC HE 24,32,48,56,64,128
X21
aptX
TM
64,128,192,256,384,576
1 Mono
or
1 Stereo
30
Over IP, the second MONO communication is fixed to G722.