Updating Software Through A Serial Connection; Introduction To Xmodem - 3Com WX3008 AC POE 8GET Installation Manual

File control submenu
Select 4 from the BootWare main menu to enter the file control submenu. The following information is
displayed:
=================================<File CONTROL>================================
|Note:the operating device is flash
|<1> Display All File(s)
|<2> Set Application File type
|<3> Delete File
|<0> Exit To Main Menu
===============================================================================
Enter your choice(0-3):
BootWare operation submenu
Select 7 from the BootWare main menu to enter the BootWare operation submenu. The following
information is displayed:
===========================<BootWare Operation Menu>===========================
|Note:the operating device is flash
|<1> Backup Full BootWare
|<2> Restore Full BootWare
|<3> Update BootWare By Serial
|<4> Update BootWare By Ethernet
|<0> Exit To Main Menu
===============================================================================
Enter your choice(0-4):
Storage device operation submenu
Select 9 from the BootWare main menu to enter the storage device operation submenu. The following
information is displayed:
================================<DEVICE CONTROL>===============================
|<1> Display All Available Nonvolatile Storage Device(s)
|<2> Set The Operating Device
|<3> Set The Default Boot Device
|<0> Exit To Main Menu
===============================================================================
Enter your choice(0-3):

Updating Software Through a Serial Connection

Introduction to XMODEM

To update BootWare and applications through a serial connection, use the XMODEM protocol.
XMODEM is a file transfer protocol that is widely applied due to its simplicity and good performance.
XMODEM transfers files through serial ports. It supports two types of data packets (128 bytes and 1 KB),
two check methods (general checksum and CRC), and error packet retransmission mechanism
(generally the maximum number of transmission attempts is ten).
The XMODEM transmission procedure is completed by the cooperation of a receiving program and a
sending program. The receiving program sends a negotiation packet to negotiate the packet check
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