H3C S12500 Installation Instructions Manual page 80

Menu item 9 is not supported currently.
When loading the host program through the BootWare menu, you must configure correct attributes of
the serial interface (such as the bits per second, data bit, parity, stop bits, and flow control). Otherwise,
the HyperTerminal does not respond. For details, refer to Chapter 4 "Commissioning the Switch".
Updating software through console port (XModem)
Brief introduction to XModem
XModem, a type of file transfer protocol, is broadly applied for its simplicity and good performance. It
transmits files through serial interfaces, supporting 128 bytes and 1 KB in terms of data unit, checksum
and CRC in terms of checking mode, and multiple retransmissions (usually ten attempts) in the event
that packet errors are found.
XModem completes transmission by the receiving program (receiver) and the sending program
(sender). In XModem, the transmission begins with the sending of negotiation characters from the
receiver for the purpose of check mode negotiation. After passing the negotiation, the sender is allowed
to send the first data packet. Upon the receipt of the complete packet, the receiver checks the packet
using the agreed checking mode and will send an ACK if the packet has passed the check and a NAK if
not. Receiving the ACK, the sender will send the next packet; receiving the NAK instead, the sender will
retransmit the previously sent packet.
Xmodem application
Step1 In the BootWare menu, enter 2, press Enter, and the system will access the serial interface submenu:
===========================<Enter Serial SubMenu>==========================
|Note:the operating device is cfa0
|<1> Download Application Program To SDRAM And Run
|<2> Update Main Application File
|<3> Update Backup Application File
|<4> Update Secure Application File
|<5> Update User Private File
|<6> Modify Serial Interface Parameter
|<0> Exit To Main Menu
==========================================================================
Enter your choice(0-6):
Step2 Enter 6 in the serial interface submenu and press Enter to access the following interface for setting the
parameters of the downloading serial interface:
===============================<BAUDRATE SET>=============================
|Note:'*'indicates the current baudrate
| Change The HyperTerminal's Baudrate Accordingly
|---------------------------<Baudrate Avaliable>---------------------------|
|<1> 9600(Default)*
|<2> 19200
|<3> 38400
|<4> 57600
5-10
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