Longshine LCS-8156C1 - Manual (Page 37)

AT Commands for CX930xx Modem Reference Manual
102752B Conexant 3-13
%8 - Plug and Play Vendor ID and Product Number
Sets and stores Vendor ID and product number for serial Plug and Play and for ISA Plug
and Play which use the Conexant 11596 Plug and Play device. Applicable to Desktop
configuration only.
Syntax
%8<3 ASCII characters><4 hex numbers><same 3 ASCII characters><same 4 hex
numbers>
Example
%8CXT0324CXT0324
Result Codes
OK
ERROR Otherwise
**- Download Firmware Code
The AT** command allows users to customize modem firmware and add or override
country profiles by uploading NVRAM or SRAM patches.
Uploading NVRAM Patch
The NVRAM loader allows NVRAM connected to the modem serial EEPROM bus to be
upgraded with custom patch code. This process transfers the modem patch code from the
host computer to the modem, which transfers the data to the NVRAM device. Uploading
an NVRAM patch to the NVRAM device is a two-step process.
1. When the AT** command is issued, the modem firmware boot loader is invoked and
the user will first load the NVRAM loader into the modem's RAM. The data transfer
is done via an ASCII transfer. The NVRAM loader contains the programming
algorithm for the NVRAM device being programmed.
2. The user will then load the NVRAM patch which the NVRAM loader will then
program into the NVRAM device. This transfer is done via ASCII transfer.
Procedure
1. Put the NVRAM loader (e.g., NVM02-16.S37) and the NVRAM patch file (e.g.,
PatchB3-05-00_NVM.S37) in an appropriate directory on the computer's hard disk.
2. Configure the communications application program for a DTE rate of between 9600
bps and 115200 bps and RTS/CTS flow control.
3. Check the modem for response by typing AT.
4. Initiate the download process using the AT** command. The “Download initiated ..”
message appears upon issuing the AT** command.
5. Perform an ASCII transfer of the NVRAM loader file (e.g., NVM02-16.S37) from
the host computer to the modem RAM using an industry standard communications
software or an equivalent process (ensure that all ASCII translation or pacing is
turned off).
6. After the NVRAM loader has been loaded perform an AASCI transfer of the
NVRAM patch file (e.g., PatchB3-05-00_NVM.s37) from the host computer to the