Command

Options

Function & Description

 

Z0

Reset and recall user profile 0. Either Z0 or

 

 

Z1 restores the same single profile.

*Manufacturer default

Extended AT& Command Set

Command

Options

Function & Description

&Cn

 

Data carrier detect option

 

&C0

State of carrier from remote modem is ignored. DCD circuit is always on

 

&C1 *

DCD turns on when the remote modem’s carrier signal is detected, and

 

 

off when the carrier signal is not detected.

&Dn

 

Data Terminal Ready (DTR) option.

 

&D0

DTR ignored

 

&D1

Go to command mode on on-to-off DTR transition

 

&D2 *

Hang up and go to command mode on on-to-off DTR transition. Auto-

 

 

answer is disabled if DTR is low

 

&D3

Hang up and reset from user profile 0 on the on-to-off DTR transition

&F

 

Recall factory default setting as active configuration

&Gn

 

V.22bis guard tone option

 

&G0 *

No guard tone

 

&G1

550 Hz guard tone

 

&G2

1800 Hz guard tone

&Kn

 

Set local flow control

 

&K0

Disable flow control

 

&K3 *

Enable bi-directional hardware flow control (CTS/RTS)

 

&K4

Enable bi-directional software flow control (XON/XOFF)

&Pn

 

Pulse dialing make/break ratio selection

 

&P0

Make=39%, Break=61%, international version (Default)

 

 

Make=33%, Break=67% for use in 20 pps, Japanese version

 

&P1

Make=33%, Break=67%, international version

 

 

Make=33%, Break=67% for use in 10 pps, Japanese version (Default)

&Qn

 

Async communications mode options

 

&Q0

Async mode, buffered (same as “AT\N0”)

 

&Q5 *

Error control mode, buffered (same as “AT\N3”)

 

&Q8

MNP error control mode. If an MNP error control protocol is not

 

 

established, the modem will fallback according to the current setting in

 

 

S36 register.

 

&Q9

V.42 or MNP error control mode. If neither error control protocol is

 

 

established, the modem will fallback according to the current setting in

 

 

S36 register.

&Sn

 

Data Set Ready (DSR) option

 

&S0 *

DSR always on

 

&S1

DSR on during handshake and on-line, off in test mode or idle mode

&Tn

 

Self-test commands

 

&T0

Terminate any test in progress

 

&T1

Local analog loopback test

 

&T3

Local digital loopback (LDL) test

 

&T6

Remote digital loopback test

&V

 

View active file and stored phone numbers

AT Command Set Summaries 15

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ZyXEL Communications 3356P user manual Extended AT& Command Set

3356P specifications

ZyXEL Communications 3356P is an advanced networking device designed primarily for small to medium-sized businesses that require reliable connectivity and efficient performance. This versatile product combines switching and Power over Ethernet (PoE) capabilities, making it a significant addition to any network infrastructure.

One of the standout features of the ZyXEL 3356P is its PoE functionality. This device supports Power over Ethernet, allowing it to deliver electrical power along with data to connected devices such as IP cameras, VoIP phones, and wireless access points. With a total power budget of 65 Watts, the switch can adequately support multiple PoE devices simultaneously, simplifying deployment and reducing the need for additional power outlets.

The ZyXEL 3356P is equipped with 24 Gigabit Ethernet ports, ensuring high-speed data transfer and reducing network bottlenecks. The use of Gigabit technology allows for significantly improved bandwidth, which is crucial for businesses that rely heavily on data-intensive applications like video conferencing and large file transfers. Additionally, the switch operates with a non-blocking architecture, providing full duplex communication for maximum throughput.

ZyXEL's 3356P is focused on security and management, featuring advanced Layer 2 and Layer 3 switching capabilities. It supports VLAN tagging, which allows for the segmentation of network traffic and enhancements in security. This function helps maintain performance and reduces the risk of unauthorized access to sensitive information.

Traffic management is further enhanced with Quality of Service (QoS) protocols. This functionality prioritizes essential traffic, ensuring that critical applications receive the necessary bandwidth while less urgent data transfers are handled appropriately. This feature is particularly beneficial for businesses that demand seamless connectivity and consistent performance from their networks.

The device also comes with built-in network management capabilities, allowing network administrators to monitor performance and configure settings quickly. With support for both Web-based management and Simple Network Management Protocol (SNMP), the ZyXEL 3356P provides flexibility in administration, making it user-friendly for both IT professionals and less tech-savvy individuals.

Overall, ZyXEL Communications 3356P is an exceptional choice for organizations looking for a reliable, feature-rich networking solution. With its robust performance, PoE capabilities, advanced security features, and ease of management, it stands out as a reliable foundation for a scalable and efficient network.