V-Tap VoIP Manual EN v2.7 Oct 2018 © 2017-2018 Vidicode 24
3.3.9
SD Card settings
The SD card is used to store the recorded VoIP data from the local
network. The system writes the data to files in the Tunnel format, which
is the same as the format sent to a Tunnel server, so default encrypted.
The files on SD card are opened and closed automatically, depending on
some parameters below. The SD card must be FAT32 formatted and can
be seen as a big cyclic memory buffer for the system.
In case of using a Tunnel server, the files are sent to the server as soon as
they are closed. So, data is not sent live to the sever then, but after a no-
data timeout or after a file has reached its maximum size.
In the case that no Tunnel server is used, the files are just stored on the
card until the user gets the card out. SD cards with recorded Tunnel files
on them can be read and interpreted by the Call Recorder VoIP software
on the PC.
Files are not deleted from the card by the system. Files are written until
the card is full (error situation) or until the maximum number of files has
been reached, in which case the oldest files are overwritten.
Without an SD card, the system has only little buffering capabilities. Any
disturbance in the Tunnel connection would then lead to the loss of
data.
Another function for the SD card is to define a fixed IP address for the V-
Tap unit; see
IP address
. Yet another function is to update the firmware.
Safely removal of the SD Card and Power Off.
. Press the button for 2 seconds (Amber & Blue LED OFF).
. Release the button (Amber LED flashing).
. Take out the SD card or the USB cable (power off).
NOTE:
The procedure above does not work when start/stop with the button is
set (see Button Mode). In that case, the SD card can just be taken out.