Prontonet User’s Manual v410 92
Taking into account the previous table the user must also bear in mind the
following:
1. In X21 o ISDN, it is only possible to set different encoding and decoding
algorithms independently, with those algorithms that support automatic
synchronising. For example, it is possible to transmit on G722 and receive on
MPEG Layer II.
Although G711 is detected automatically in ISDN mode, the Encoder is also
configured automatically because it is not possible to use it in any other
combination.
2. If we want to receive an algorithm that does not support automatic
synchronisation it is necessary to configure the Encoder to the same
algorithm.
3. If we want the Encoder to switch to the algorithm detected by the Decoder,
the Encoder should simply be set to AUTO mode.
AUTO does not work with aptX when NET is X21 or ISDN.