ProntoNetLC User Manual
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VI.10 ProntoNetLC operating as an X21 codec
This operation is very simple. Remember that the ProntoNetLC only has one X21
port and that it is possible to connect or disconnect simply using the CALL 1 key.
As soon as the connection is made the ProntoNetLC starts to transmit and
receive audio via the X21 port.
VI.11 How the backup mode works
ProntoNetLC when is configured as IP codec or X21 codec (NET = IP o NET =
X21) can use the ISDN connection as backup line, that is, the ISDN will be an
alternative communication line when the IP or X21 line is dropped.
This option is available in the SYS menu:
VI.11.1 MASTER & SLAVE Configuration
The backup operation is based on the interaction between two ProntoNetLCs,
one of them working in MASTER mode and the other end configured as SLAVE.
The user must configure each unit in one of these modes before to enable the
backup facility. The option SYS – BACKUP - MODE allows the selection of Master
or Slave.
Once the backup option has been validated, the ProntoNetLC configured as
MASTER monitors continuously if the main line is working appropriately in order
to decide if the main line is dropped or, in case the unit is working in backup
mode (ISDN connection), if the main line (IP or X21 communication) has been
re-established.
The ProntoNetLC MASTER uses the information stored in the index 1 of the
phone book to configure the unit and to call to the stored numbers.
The ProntoNetLC SLAVE only works in backup mode depending on if there is
communication by the ISDN line.
Please, find below an example of ProntoNetLC backup application to note the
differences between both working modes.
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