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EtherBoot is an all-in-one application for interfacing a cable modem to your computer via use of a console cable. This software will automatically halt the startup process of SB3100, SB4100, and SB4200 series cable modems, and then allow you to boot a firmware file from your computer into the cable modem's memory. Using this software is ideal for changing firmware (such as installing SIGMA) or revising a dead cable from a bad firmware update.
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Code:
http://www.4shared.com/file/140102494/f727760b/etherboot_15.html