Net-2000™ Voice Codec Unit
User’s Manual
Page 2
DVSI Confidential Proprietary
Section 1 – Net-2000™ VCU Introduction
to digital speech samples. The decoded samples are converted back into analog speech via the AIC-
10 codec whose output is sent to both the handset and line-level output connections.
Set-up
Initial set-up of the Net-2000™ VCU is fast and straightforward. The Ethernet interface is equipped to
handle IP address information from a DHCP server making network installation routine. Alternatively,
the RS-232 serial port can be used via telnet as a console terminal to allow low-level network setup.
Net-2000™ modes of operation
The Net-2000™ VCU provides the user with two modes of operation VOIP Mode and File Mode. To
provide full duplex real-time communication, the Net-2000™ VCU can channel the compressed bit
stream through either the RS-422 or the Ethernet interfaces to another Net-2000™ VCU.
Alternatively, in File mode the Net-2000™ VCU can Encode/Decode files stored on a PC on the LAN
for non-real-time testing and evaluation. The Net-2000™ VCU remains in an idle state until it gets a
command to start and stop processing (encoding and/or decoding) data that is being sent.
Control
When connected on a LAN — any PC on the network can use a standard web browser to control the
Net-2000™ VCU through the use of a PC web browser. The user-friendly web pages built-into the
Net-2000™ make it easy to select analog audio interfaces, select the vocoder mode and to establish
real-time, full-duplex communication across the Ethernet connection. In addition to the control, the
web pages display information about network settings, operating mode and system status. Since the
Net-2000™ uses Ethernet, its web page can even be accessed over a wireless network through a
wireless notebook or tablet PC.
The Net-2000™ can also be controlled via PC connected to the RS-232 interface. Connecting to the
RS-232 interface allows for both low level set-up of the NET-2000™ VCU and for control using ASCII
commands. Input and output gain settings for the voice codec can be also specified.
Protocol
The Net-2000™ VCU uses DVSI’s own UDP interface described in Section 4. This allows users to
develop their own application controls and user interfaces for an endless array of customized
applications.
Before using the Net-2000™ VCU, read through this user’s manual in its entirety, paying careful
attention to the safety instructions beginning on page ii.
