operation will reinitiate the modem handshaking and enable data communication.

Equivalent AT Commands:

+++Escape sequence code; causes a modem to return to command state. Enter the escape sequence while in data state and wait for the modem to respond.

ATH

Go on-hook; disconnect the modem.

ATD

Go on-line in Originate mode.

ATA

Go on-line in Answer mode.

Repeat Last Dial

Access R (Repeat last dial) by pressing the left or right arrow key and the ENTER key. Before a connection is made, any key pressed from the front panel or terminal keyboard will abort the redial operation.

Equivalent AT Commands:

ATDL

Repeat last dial.

A/

Repeat last command once.

A>

Repeat last command once, retry the last call up to 9 times.

 

(country specific)

Auto Answer

Move to the STATUS REGISTER menu, and change the S0 value to the desired number of rings until the modem automatically answers. Setting this value to zero disables auto answer.

Equivalent AT Commands:

ATS0=0

Disable auto answer.

ATS0=n

Automatically answer on the nth ring.

LCD Panel Operation 35

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Image 49
ZyXEL Communications U-336SA user manual Repeat Last Dial, Auto Answer, Ath, Atdl

U-336S, U-336SA specifications

ZyXEL Communications, a leading global provider of networking and cybersecurity solutions, has offered a range of products designed to cater to various connectivity needs. Among these, the U-336SA and U-336S modems stand out for their reliability and performance, particularly in the dial-up category during the heyday of internet access.

The U-336SA and U-336S modems are external devices that revolutionized the way users connected to the internet in the late 1990s and early 2000s. Designed for both home users and small businesses, these modems supported 33.6 Kbps data transfer rates, which, at the time, were considered cutting-edge. This capability allowed for reasonably swift internet browsing, email communication, and file downloads compared to earlier modems.

One notable feature of both the U-336SA and U-336S models is their plug-and-play functionality. This ease of use made them accessible to even the less tech-savvy users, allowing quick and straightforward installation. Users could connect the modems to their PCs or laptops via a standard serial interface, minimizing setup time and complexity.

Additionally, both modems were equipped with error correction and data compression technologies. The V.42 and V.42bis protocols enhanced data integrity during transmission, ensuring that users experienced fewer disruptions and greater reliability in their connecting experience. This was particularly vital for tasks like file transfers and large downloads, where data integrity was paramount.

The modems also featured compatibility with various operating systems, including early versions of Windows, which expanded their appeal to a broader audience. The U-336SA was specifically engineered as a standalone device, while the U-336S could often be used with existing computer systems, showcasing versatility in various deployment scenarios.

In terms of design, both modems were compact and lightweight, allowing for easy portability. This made them suitable for users who required connectivity on the go or in different locations.

Ultimately, the ZyXEL U-336SA and U-336S modems represent a significant technological achievement in the history of internet connectivity. Their introduction set the stage for subsequent advancements in modem technology and played a crucial role in the evolution towards broadband and high-speed internet access that we enjoy today. Their legacy endures in the foundational technologies and protocols that continue to drive modern telecommunications.