ZyXEL Communications 56K manual Physical Layer Capacity, Hardware CTS/RTS Flow Control

Page 25

User's Guide for ZyXEL Omni 56K USB Modem

Table 6. Physical Layer Capacity

STANDARD

BIT RATE

BAUD RATE

MODULATION

CARRIER FREQUENCY

 

[bps]

[baud]

 

[Hz]

V.90

28000-56000

8000

PCM

0

V.34

2400-33600

multiple

TCM

multiple

V.32bis

14400

2400

128-TCM

1800

V.32bis

12000

2400

64-TCM

1800

V.32bis

9600

2400

 

1800

V.32bis

7200

2400

16-TCM

1800

V.32bis

4800

2400

 

1800

V.32

9600

2400

32-TCM

1800

V.32 uncoded

9600

2400

16-QAM

1800

V.32

4800

2400

4-DPSK

1800

V.23

1200/75

1200/75

FSK

 

V.23

600/75

600/75

FSK

 

V.22bis

2400

600

16-QAM

1200 Call

 

 

 

 

2400 Ans

V.22 (BELL 212)

1200

600

4-DPSK

1200 Call

 

 

 

 

2400 Ans

V.21 (BELL 103)

300

300

FSK

 

Flow Control

This feature refers to stopping and restarting the flow of data into and out of the modem’s transmission and receiving data buffers. Flow control is necessary so that a device does not receive more data than it can handle. The Omni 56K USB provides two kinds of flow control methods.

Hardware CTS/RTS Flow Control

This is a bi-directional flow control where CTS and RTS are simulated RS-232C signals that must be available on your computer. When the modem’s transmission buffer is almost full, the modem drops CTS to signal the DTE that it cannot accept data any more. Turn on the CTS to notify the DTE that it can keep sending data to the modem. On the computer software side, when the receiving buffer of the software is almost full, it drops RTS to signal the modem to stop sending data to the DTE. Turn on the RTS and the modem starts sending data again to the DTE.

3-5

Image 25
Contents ZyXEL ZyXEL Omni 56K USB Modem Iii Users Guide for ZyXEL Omni 56K USB Modem Become a Registered Owner ZyXEL Omni 56K USB ModemCustomer Support Table of Contents Glossary Firmware UpgradeList of Tables Page List of Figures Page About ZyXEL Omni 56K USB How to Use This GuideOther Reference Page Chapter Main FeaturesPage Front Panel LEDs Panel DescriptionFront Panel LEDs for Omni 56K USB LED Function DescriptionBack Panel Description Back PanelBack Panel Description USB LineUSB Connector Connecting Your Omni 56K USBGetting Started Hardware Specification SpecificationsHardware Specifications Specification DescriptionFirmware Specifications Firmware SpecificationMNP SrejProtocol Support Command SetFeature Description Data/Fax/Voice Feature DescriptionOmni 56K USB Capability Data FunctionFlow Control Physical Layer CapacityHardware CTS/RTS Flow Control Standard BIT Rate Baud Rate Modulation Carrier FrequencySoftware XON/XOFF Flow Control Error ControlData Compression Repeat DialCaller Number Delivery Caller ID Cyclic DialRing Here is an example Different Ring Types in Register S40 Distinctive RingType BIT on Ring Sequence Security Function Code Description Fax Function Voice IS-101 Command SetVoice Function Fax Physical Layer Protocol Fax Physical Layer CapacityBit Voice Data Compression Result Codes Result CodesATV0 ATV1 Connect ATV0 ATV1 X4 Carrier Rx Rate Basic AT Command Sets Data Command SetsBasic AT Command Sets AT Command Sets Requiring an AT PrefixAnswer UPX Extended AT& Command Set Extended AT& Command SetsUsers Guide for ZyXEL Omni 56K USB Modem Users Guide for ZyXEL Omni 56K USB Modem ALB+ST Extended AT* Command Sets Extended AT* Command SetsCommand *Gn requests supervisor password checking Extended AT# Command Sets Extended AT# Command SetsService Class 1 Commands Fax Command SetsService Class 1 Commands Value of MOD ParametersCommand Syntax Service Class 2 CommandsSupported Commands per TIA PN2388 dated 8/20/1990 Command Syntax Description+FDR Command Description+FK +FMDL?+FPHCTO= Class 2 Command Responses+FREV? Response Value Function and Description+FPOLL Class 2 Flow Control+FVOICE Service Class 2.0 Commands Service Class 2.0 CommandsUsers Guide for ZyXEL Omni 56K USB Modem +FCLASS Voice AT Commands Voice AT CommandsCommand Function Option Default Description +VRA +VLS+VRN +VTXVoice Shielded DTE Commands Voice Shielded DTE CommandsVoice Shielded DTE Responses Voice Shielded DTE ResponsesBasic S-Registers ATSn=x Register DescriptionsBasic S-Registers ATSn=x Extended S-Registers ATSn=xEnable baud rate to be fixed when answering. Speed Is detected ATX1 ATX2 ATX3 ATX4 Users Guide for ZyXEL Omni 56K USB Modem ATA Enable 1.5 sec, pause between off-hook and modem Bit Page Upgrading by Software for Windows 98/NT/2000 Firmware UpgradeUpgrading by Using a Terminal Program Ascii ARQCcitt CNG CDRCRC CTS/RTSDCE DCDDLE DramDSR FAQDTE DtmfFSK FCCHdlc HttpISP IRCITU-TSS LANMNP LineNdis NICPhone PBXPots Quiet PstnRAM RFCRTS/CTS Uart TAE6Unix URLXmodem WWWXON/XOFF Index
Related manuals
Manual 1 pages 40.48 Kb

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.

In terms of characteristics, the ZyXEL 56K modem is designed with user experience in mind. Its compact, lightweight design allows easy installation and placement, making it ideal for both home users and professionals. The intuitive user interface, coupled with straightforward installation procedures, ensures that even those with minimal technical knowledge can set up the device without hassle.

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.

The modem also features built-in error correction and data compression techniques, which improve data integrity and optimize transmission speeds. Overall, the ZyXEL Communications 56K modem remains a reliable choice for users who require dependable dial-up internet access, showcasing the brand's dedication to fostering connectivity in diverse environments.