Zoom support files in PDF format can be opened using Adobe Acrobat Reader software. These documents retain all of their formatting, charts and graphics, and are viewable on most operating systems and platforms with free viewers from Adobe Systems.
1118-2.pdf - Commands for Host-Processed and Host-Controlled Modems. This is AT command reference manual for the controllerless V.90 and V.92 USB faxmodems. These include the Models 2990 and 3090.
V250_CMD.pdf - This is a detailed file of the new V.250 commands used to support V.92 protocol.
These documents can also be downloaded from the Model 3090 support page.
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