======HOW TO ERASE THE FLASH MEMORY AND UPLOAD NEW FIRMWARE======



**Symptoms:** How to erase the flash memory and upload new firmware  
  * Unable to upload new firmware  
  * Flash memory corrupted  Cannot access the CLI (Command Line Interface)  



**Facts:** SuperStack II Remote Access System 1500  
  * Firmware  
  * Flash memory  

**Fixes:** To erase the flash memory and upload new firmware follow these steps:

//WARNING: Be sure not to power off the unit during this procedure//

**1.**  Start a terminal program supporting Z-Modem/SDL2 (for example, Microsoft Windows Hyperterminal)
(For more info please refer to 3KB document How to access the CLI using Microsoft Windows Hyperterminal )

**2.**  Reboot the RAS1500 by typing 'reboot' and confirm this by typing 'y'

**3.**  When the unit displays 'Initializing...' press the 'ESC' key 3 times within 2 seconds

**4.**  When the 'SDL2 is ready' message and the menu are displayed, type 'AT{E}' and press 'enter' within 5 seconds to erase the flash memory
The unit will now erase the entire flash memory and then reboot

**5.**  When the unit displays 'initializing...' press the 'ESC' key 3 times within 2 seconds

**6.**  When the 'SDL2 is ready' message and the menu are displayed, type 'AT{Z}' and press 'enter'
'Begin download now' is displayed

**7.**  From Hyperterminal use the Z-modem protocol to send the file 'rasboot.dmf' to the RAS1500

**8.**  When the file is successfully downloaded, the RAS1500 will reboot

**9.**  After rebooting, when the unit displays 'Initializing...' press the 'ESC' key 3 times within 2 seconds

**10.**  When the 'SDL2 is ready' message and the menu are displayed, type 'AT{Z}' and press 'Enter'
The message 'Begin download now' is displayed.

**11.**  From Hyperterminal use the Z-modem protocol to send the file 'ras1500.dmf' to the RAS1500

**12.**  When the file is successfully downloaded, the RAS1500 will reboot

**13.**  Let the RAS1500 finish its reboot this time.  It will startup at the Quick Configuration process.

**14.**  Go through the Quick Configuration to reconfigure the RAS1500. (recommended:  answer 'no' to the question asking whether you'd like to only configure enough to use the web interface)  
 

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  * Product(s):  SuperStack II Remote Access System 1500, SuperStack 3 Remote Access System 1500  
  * Sub Product(s): SuperStack 3 Remote Access Server 1500  



 --- //[[nce@itclatam.com|David Gonzalez]] 2021/04/09 12:23//