PortaNet User Manual
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VIII.2.2.3
Aux Data
RS232: There is one RS232 port for use as auxiliary data port. This port
allows the transmission and reception of data along with the encoded audio.
When the option is checked, the corresponding decoder will allow the
reception of ancillary data.
Over ISDN, it is possible to choose between ProntoNet format and Pronto2/3
format (in which the GPIOs information cannot be sent). To be backward
compatible with ISDN Pronto2/3 Prodys devices, select Pronto2/3 format.
When selecting IP as communication interface, the auxiliary data can be sent
via a different path, different from the audio one (the auxiliary data are
embedded in the audio frames). This method has 3 big advantages: less
delay independent from the audio codification delay; the possibility to
send/receive auxiliary data regardless of the compression mode used for the
audio communication; and the possibility to send/receive the User bit of the
AES/EBU frame. The drawback is that the audio and data delay won’t be the
same.
GPO: Under ‘transparent’ configuration, the state of the input will be present
in its homologous output in the device connected at the other end. Since
there is only one GPO connector, user must select whether to select GPO
information coming from Decoder1 or from Decoder2, or none.
