Appendix D    Software updating procedure 
 
D-8 
 
D.4. Software Updating Procedure in Safe Mode 
If the system would not boot or software updating fails continuously, try to software update in safe 
mode with following procedure A) to E). 
 
* Do not connect any router or other equipments. Connect your PC directly to JUE-501/JUE-251.     
The IP address of the main unit  is set to “192.168.128.100”  in Safe Mode even when you have 
changed it in Main Mode. 
 
 
 
 
 
A) Download the latest software for JUE-501/JUE-251 
Confirm the website to check whether the latest software is uploaded or not, from the PC connected to 
Internet.    Download if the latest software is uploaded. (For details, refer to “D.1.  Downloading the 
latest software”) 
 
B) Start JUE-501/JUE-251 in Safe Mode 
Safe mode is available by turning on the power supply with the FN (function) button (right side button 
of the Handset) pressed. (For details, refer to “D.4.1. Start in Safe Mode
”.) 
 
C) Confirm the connection 
JUE-501/JUE-251 software updating is executed by Web browser on your PC. 
Prepare a PC and connect it to your JUE-501/JUE-251.   
  * Windows XP/Vista/7 32bit OS is required. 
The IP address of the main unit is set to “192.168.128.100” in Safe Mode even when you have changed 
it in Main Mode. To connect your PC with JUE-501/JUE-251, refer to [Sec. 6.1 Connect your PC to 
JUE-501/JUE-251].  
 
D) Update software   
Launch your Web browser* and enter “192.168.128.100” to the URL box.    The Safe Mode screen will 
appear. Click [Software Update]  on the left [menu] panel. Then,  Update the software by the 
downloaded software. (For details, refer to “D.4.3 Update software in safe mode
”) 
*
 While JUE-501/JUE-251  officially supports  Microsoft  Internet Explorer7 and Mozilla Firefox3.6, 
their upper version can be available when they have compatible system. 
 
E) Confirm the updated software version   
Confirm the software version after updating, to check  that JUE-501/JUE-251  software is correctly 
updated or not. (For details, refer to “D.3. Confirm the update software version
”) 
NOTE 
We recommend you to backup your settings before updating software though software 
update doesn’t reset your settings.