Net-2000™ Voice Codec Unit
User’s Manual
Page 24
Section 3 – Net-2000™ VCU Control
DVSI Confidential Proprietary
Processing Files With the Net-2000™ VCU Software
Note: There is PC source code provided on the included CD that interfaces to the Net-2000™
VCU in VOIP Mode for the Ethernet, the Asynchronous RS-422 interface and in FILE Mode.
The READMEs on the disc describe how to build and run the PC software examples.
The PC program allows users to encode speech to a file and decode channel data from a file. The
file mode works in conjunction with software provided by DVSI that runs on a PC. To work in file
mode you first have to load the PC software onto a PC connected to an Ethernet network that has
access to the Net-2000™ VCU. Set the Net-2000™ VCU to file mode and the unit is now ready to
accept packets from the PC using the PC program.
The PC program can run in Windows command prompt (DOS) window. It is comprised of commands
that contain the name of the file to be run and the address of the Net-2000™ VCU that will process it.
the Net-2000™ VCU can process one file at a time. Customized PC software can be written using
the Protocol information that is described in section 4.
PC-executable Program
The PC executable program is included with the Net-2000™ VCU. To install the PC software create
a directory called Net2000 and copy the contents of the floppy disk to it. To run the PC program,
open up a command prompt window, change to the Net2000 directory and run the PCFIO.exe file.
This command line program accepts the following arguments for file processing:
e name of file to be encoded
d name of file to be decoded
p number of the port you want to make the connection to (number must be between XX an XX)
r rate the file is to be encoded to
f name of the file to be created from the input data
The file will be processed and save to the same directory that the PC executable software is located.
FILE Mode Settings
Vocoder Type
The vocoder type selection sets the Net-2000™ VCU to be ready to accept packets containing the
appropriate data that corresponds to the selected vocoder type. When in FILE Mode if a packet of
data is sent to the Net-2000™ VCU that is for a different vocoder than is set in the FILE Mode Page
then the Net-2000™ VCU will see the data as invalid and return silence.
Port Number
The network settings page allows the operator to change the network port number for the
communication channel. The default port number is Port 4000. If a different port number is required
enter in the desired port number and select the configure button. Valid port numbers are greater than
1024 and less than 65535. Port numbers 4001, 4002 and 4003 are reserved by the Net-2000™ VCU
and must not be used.
Start / Stop File Mode
The start file mode button is used to put the Net-2000™ VCU is an mode where it is available to be
used for encoding or decoding by a PC on the Ethernet network. In this mode the Net-2000™ VCU is
waiting for data on the Ethernet interface. The Net-2000™ VCU will remain in file mode until the Stop
file mode button is selected.