QVidium QVMP2C-1011 - Manual (Page 21)

User’s Manual v.28 QVidium™ MPEG2+4 Codec
7
Resetting Flash Memory
The MPEG2+4 IP Codec uses non-volatile flash memory module to store all boot code and system
settings. It incorporates two levels of flash memory: a low-level read-only partition that stores a
complete image of the operating system and factory default settings, and a writable, application-
level partition that stores the working settings and current application code. When the device
powers up, it loads the operating system from the low-level flash partition into system RAM and
begins execution from system RAM. When the codec starts encoding or decoding, or when you
use its web interface, the codec executes application programs, web pages, and scripts stored in
the upper application-level flash partition. The codec also stores any system updates or changes to
the current system settings in this upper-level of flash memory, including the IP address and
password.
Should you forget the systems IP address or password and wish to restore these to a know
factory-default state, or if somehow the upper-level of flash becomes corrupted, such as by losing
power when doing an update, the codec can be brought back to its factory-default state by
following the procedures below. The codec has four different reset procedures for different levels
of restoration subdivided into two categories: resetting flash default system parameters and
settings, and re-initializing flash memory. These four reset procedures are listed here in order from
least intrusive to completely erasing and re-initializing the entire application-level partition of flash.
The first category, resetting flash parameters, involves holding in the reset button during normal
operation. The second category requires that the system reset button be held in during boot-up.
You can find the reset button through the small hole on the left side of the Codec (referenced with
respect to the front of the Codec as shown in Section 1.3).
7.1 Resetting Flash Parameters
To restore the codec’s settings, these following reset modes apply when holding in the reset
button at anytime during normal operation of the codec.
• Resetting System Password
During normal operation, depressing the reset button for 2 or more seconds (but less than 8
seconds) will reset the codec’s password to the factory default of “root” (username is also “root”).
It will also send out a gratuitous ARP reply packet. Using network monitoring software, such as
Wireshark, Ethereal, or NetMon, you can detect this ARP packet and determine the codec’s
current IP address.
• Restoring All System Settings
Holding in the reset button for 10 or more seconds during normal operation restores all system
settings to their factory default values, and also sends out an ARP reply packet. The IP address
will be restored to 192.168.1.100, the netmask to 255.255.255.0.
21 of 45 - Copyright 2007-2008 QVidium™ Technologies, Inc.