Why is my ZyXEL Communications U-336S Modem loading defaults?
The ZyXEL Communications Modem loads default settings due to an EEPROM checksum error. The factory default settings will be downloaded to the EEPROM, and the self-test will be re-initiated. Note that this is not a real error.
What does VO CALIBRATION FAIL mean on ZyXEL Communications U-336S Modem?
The Power-on self-test indicates an analog circuit calibration error.
What does VR CALIBRATION FAIL mean for ZyXEL Communications U-336S Modem?
The Power-on self-test indicates an analog circuit calibration error.
What does FR CALIBRATION FAIL mean on ZyXEL Communications Modem?
The Power-on self-test indicates an analog circuit calibration error.
What does DSP RAM FAIL mean for ZyXEL Communications Modem?
The Power-on self-test indicates testing of DSP RAM fails.
General| Brand | ZyXEL Communications |
|---|---|
| Model | U-336S |
| Category | Modem |
| Language | English |
Lists necessary external equipment for modem operation.
Details the standard and intelligent features of the modem.
Describes basic operational capabilities and specifications of the modem.
Highlights advanced functionalities like call detection and security.
Specifies supported fax standards and command sets.
Outlines operational parameters like mode, flow control, and diagnostics.
Describes the physical layout and components of the modem's front panel.
Explains the function and meaning of each LED indicator on the front panel.
Details the purpose of the four key switches on the front panel.
Identifies connectors and indicators on the rear panel of the modem.
Provides instructions for connecting the modem to power and communication lines.
Guides the user through the modem's power-on sequence and diagnostic tests.
Explains the use of AT commands for configuring and controlling the modem.
Details how to use Hyper Terminal for issuing AT commands and configuring the modem.
Covers methods and commands for initiating and receiving calls with the modem.
Explains how to use the ATD command for various dialing methods.
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