User's Guide for ZyXEL Omni 56K USB Modem

5.1.2 Extended AT& Command Sets

Table 12. Extended AT& Command Set

 

COMMAND

OPTIONS

FUNCTION AND DESCRIPTION

Ref.

 

 

&Bn

 

Data rate, terminal-to-modem (DTE/DCE):

S28.6

 

 

 

&B0

DTE rate follows connection rate. (See

 

 

 

 

 

also S44.6).

 

 

 

 

&B1 *

DTE (data terminal equipment)/DCE (data

 

 

 

 

 

circuit-terminating equipment) rate fixed at

 

 

 

 

 

DTE setting (See also S18, S20, and

 

 

 

 

 

S44.6).

 

 

 

&Cn

 

Carrier Detect (CD) options:

S21.4

 

 

 

&C0

CD always ON (See also S42.7).

 

 

 

 

&C1 *

CD tracks presence of carrier (See also

 

 

 

 

 

S38.3, S42.7).

 

 

 

&Dn

 

Data Terminal Ready (DTR) options. (See

S21.6-7

 

 

 

 

also S25):

 

 

 

 

&D0

Ignore DTR signal, assume DTR is always

 

 

 

 

 

ON.

 

 

 

 

&D1

108.1, DTR OFF-ON transition causes dial

 

 

 

 

 

of the default number. (See also 'AT*Dn'

 

 

 

 

 

and S48.4).

 

 

 

 

&D2 *

108.2, Data Terminal Ready, DTR OFF

 

 

 

 

 

causes the modem to hang up.

 

 

 

 

&D3

Same as &D2 but DTR OFF causes the

 

 

 

 

 

modem to hang up and reset from profile

 

 

 

 

 

0.

 

 

 

&F

 

Load factory settings to RAM as active

 

 

 

 

 

configuration.

 

 

 

&Gn

 

Guard tone options:

S28.4-5

 

 

 

&G0 *

No guard tone (within USA, Canada).

 

 

 

 

&G2

1800 Hz guard tone.

 

 

 

&Hn

 

Data flow control, DTE/DCE:

S27.3-5

 

 

 

&H0

Flow control disabled.

 

 

 

 

&H3 *

Hardware (CTS/RTS) flow control.

 

 

 

 

&H4

Software (XON/XOFF) flow control.

 

 

 

&Kn

 

Modem error control and data

S27.0-2

 

 

 

 

compression:

 

 

 

 

&K0

No error control. (Same as AT&K).

 

 

 

 

&K1

MNP4 (See also S41.0), (include MNP3).

 

 

 

 

 

 

 

 

5-4

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ZyXEL Communications 56K manual Extended AT& Command Sets

56K specifications

ZyXEL Communications has long been a key player in networking technologies, and their 56K modems stand out as a testament to the company’s commitment to high-performance connectivity. The ZyXEL 56K modem provides users with efficient dial-up internet service, delivering reliable performance for both home and small office environments.

One of the main features of the ZyXEL 56K modem is its data transfer capability, offering speeds of up to 56 Kbps. This speed is accomplished by utilizing the latest advancements in modem technology, enabling users to experience smoother browsing, faster downloads, and efficient email communications. Despite being primarily a legacy technology, the ZyXEL 56K modem continues to be valued in areas where broadband connectivity options are limited or unavailable.

The ZyXEL 56K modem utilizes V.90 and V.92 standards—these protocols define how data is transferred over phone lines. With the V.90 standard, the modem can achieve a maximum download speed of 56 Kbps while upload speeds can reach up to 33.6 Kbps with the V.92 standard. V.92 also introduces enhanced features such as a modem on hold, enabling users to receive voice calls while connected to the internet.

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Additionally, the ZyXEL 56K modem supports various connectivity options, including serial and USB interfaces, allowing compatibility with a wide range of computers and operating systems. This versatility ensures that users can seamlessly connect to their existing devices, enabling broad usage opportunities.

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