Ix.3 Portanet Working As A "Dual Codec" Over Isdn - Prodys PortaNet User Manual

The available bandwidth over the selected network (IP, ISDN). This places
limitations on the bit-rate that can be selected and the amount of
compression.
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 PortaNet operation:
NET
PCM
G711
G722
MPEG1,2 LII
IP
MPEG1,2 LIII
MPEG AAC LC.LD
MPEG 4 AAC HE
aptX
G711
G722
MPEG1,2 LII
ISDN
MPEG1,2 LIII
MPEG 2,4 AAC LC
MPEG 4 AAC LD,HE
aptX
IX.3 PortaNet working as a "DUAL CODEC" over ISDN
When we select ISDN as the communications interface, it is possible to establish
two, totally independent MONO connections for each 64 Kbps B Channel. This
means that for each channel or line of communication (Line 1 or Line 2 as seen
by the PortaNet) it is possible to send an audio signal encoded with any of the
available codec algorithms. The menu offers the option to configure Encoder 1
and Encoder 2 separately with MONO signals on each channel.
incorrect configuration there are therefore certain restrictions while working with
the PortaNet as a "DUAL CODEC":
13
Over IP, the second MONO communication is fixed to G722.
PortaNet User Manual
As an example: over ISDN it is not possible to send
ALGORITHM
TM
TM
BIT RATES (Kbps)
16 bits @ 48 KHz.
64
64
64,128,192,256,384
64,128,192,256
64,128,192,256,384
24,32,48,56,64,128
64,128,192,256,384
64
64
64,128
64,128
64,128
64,128
64
Nº
CHANNELS
13
2 Mono
or
1 Stereo
2 Mono
or
1 Stereo
To avoid
100 of 156