Command

Function & Description

+Ref.

 

register also sets the time-out interval for the

 

 

“W” dial modifier to wait for the dial tone. (See

 

 

also S41b4)

 

S7=

Set duration, in number of seconds modem

+060

 

waits for a carrier

 

S8=

Set duration, in seconds, for pause (,) option in

+002

 

Dial command and pause between command

 

 

re-executions for Repeat (>) command

 

S9=

Set duration, in tenths of a second of remote

+006

 

carrier signal before recognition (Ignored if in

 

 

non-FSK or half-duplex operation)

 

S10=

Set duration, in tenths of a second, modem

+007

 

waits after loss of carrier before hanging up

 

S11=

Set duration and spacing, in milliseconds, of

+070

 

dialed Touch-Tones

 

Extended S-Registers "ATSn=x"

Command

bit

dec

hex

Function and description

Ref.

S13=

bit

dec

hex

Bit-mapped register

+000

 

1

2

2

Capture modem manufacturer

 

 

 

 

 

information during V.42

 

 

 

 

 

handshake, can be displayed at

 

 

 

 

 

ATI2 <Last Speed/Protocol>

 

 

 

 

 

line if available (‘Flash’ or ‘

 

 

 

 

 

ZyXEL’ stands for ZyXEL

 

 

 

 

 

connection)

 

S14=

bit

dec

hex

Bit-mapped register:

+002

 

0

0

0

Modem auto-handshake on

*M0

 

 

 

 

Originate mode

 

 

 

1

1

Modem auto-handshake on

*M1

 

 

 

 

Answer mode

 

106 Status Registers & Result Codes

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ZyXEL Communications U-336SA user manual Extended S-Registers ATSn=x, Command Bit Dec Hex Function and description

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.