[求助]如何更新modem firmware?

更新firmware的方法如下:
****** U.S. Robotics Courier V.Everything V.92 update ******

**************************************
***** Manual Firmware update *****
***** (All Operating Systems) *****
**************************************

To send the new code to your modem, all you need is a terminal program that can send files using the XMODEM protocol.

Start your terminal program. Adjust the settings, if necessary, so you can send AT to your modem and get an OK response.
Enter ATXMODEM. The modem should respond as follows:

atxmodem
Firmware Update
---------------
Options:
(1) Read firmware
(2) Write firmware
ESCape Exits
>

Select "2" to begin updating the code. The modem will respond with:

Ready to receive firmware update


Send the "xmf" file to your modem using either the XMODEM-Checksum or XMODEM-CRC protocol.
After the transfer is complete, you will see a *TRANSFER SUCCESSFUL* message.
Press ESC. Modem will automatically reset. Firmware update is complete.


我遇到的問題如下:
My Modem Model is 3CP3453 USROBOTICS 56K Courier V.Everything Modem.
My OS is Microsoft Windows Vista 64bit.

I have questions as below:
I saw your web site Download Firmware update version 2.2.05 (http://www.usr.com/support/3453b/34...453Bv2.2.05.zip) yesterday.
But I used many Telnet Software still cannot update Firmware.
Do you know what should I do or use what kind of telnet Software to update my modem Firmware?
Thank You!

他上面寫的更新firmware方法我都很了解,可是就是沒辦法順利完成更新。
我有試過NetTerm v5.20i terminal software, NetTerm v5.20i 有找到 my modem,
可是我在NetTerm v5.20i 輸入 at7 or atxmodem command 的時候, NetTerm v5.20i 都沒有出現任何反應。
我在NetTerm v5.20i 輸入 atxmodem command 之後,我馬上用XMODEM protocol upload main2205.XMF firmware file to modem, My modem 也沒反應,
modem 也沒有出現正在接收 main2205.XMF firmware file 的訊息。我輸入 at7 command, NetTerm v5.20i 也沒有出現 modem information 訊息。
所以我才會問你們說,在Microsoft Windows Vista 64bit 作業系統之下,要用何種terminal or telnet software?

是否NetTerm v5.20i 在設定上有問題? 還是因為NetTerm v5.20i是試用版,沒有註冊,所以有些功能沒開放?