EDR (extended Distinctive Ring).

Flash EPROM memory lets you easily upload new firmware, providing you with easy access to new features.

ZyXEL exclusive Kernel Recovery Mode for no hassle recovery from failed flash uploads - no factory repairs.

Fax Compatibility

EIA Class 1, 2, and 2.0 Fax commands.

ITU-T V.17 G3: up to 14,400bps.

ITU-T V.29 G3: up to 9,600bps.

ITU-T V.27ter G3: up to 4,800bps.

ZyXEL Fax AT commands.

Technical Specifications

Operating mode: auto-dial/answer.

Flow control: software XON/XOFF or hardware CTS/RTS.

Data/Voice toggle switch.

Configuration settings: software programmable with non- volatile memory for phone number/profile storage.

Diagnostics: self test, analog loopback (with self test), digital loopback, and remote digital loopback (with self test).

Dialing type: tone/pulse dialing.

Introduction 3

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ZyXEL Communications U-336R/RE manual Fax Compatibility, Technical Specifications