Manuals / ZyXEL Communications / Computer Equipment / Network Card

ZyXEL Communications 56K manual Cdr, Cng, Crc, Cts/Rts

Models: 56K

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User's Guide for ZyXEL Omni 56K USB Modem

CDR

Call Detail Record. This is a name used by telephone companies for call-related

 

information.

Cipher Text

Text that has been scrambled or encrypted so that it cannot be read without deciphering it.

 

See Encryption.

Class 2

A standard for fax transfers using a fax modem. Currently several drafts exist which are

 

incompatible with each other. ZyXEL modems support the draft PN-2388 of August 20th

 

1990 and the final 2.0 standard.

Client

A software program that is used to contact and obtain data from a Server software program

 

on another computer. Each Client program is designed to work with one or more specific

 

kinds of Server programs, and each Server requires a specific kind of Client. A Web

 

Browser is a specific kind of Client.

CNG

Call negotiation tone. A calling fax machine sends this tone before connecting to quickly

 

establish a fax connection. A data modem may also have a data calling tone.

CO

(Central Office): a facility that serves local telephone subscribers. In the CO, subscribers'

 

lines are joined to switching equipment that allows them to connect to each other for both

 

local and long distance calls.

Command Mode

In command mode, a modem accepts commands from the local DTE. Data transfer is

 

suspended while the modem is in command mode.

Compatibility

If components are compatible, they work with each other.

COM Port

Another name for the serial port on a PC.

Compression

See data compression.

Cookie

A string of characters saved by a web browser on the user's hard disk. Many web pages

 

send cookies to track specific user information. Cookies can be used to retain information

 

as the user browses a web site. For example, cookies are used to 'remember' the items a

 

shopper may have in a shopping cart.

CRC

Cyclic redundancy check; an error checking protocol.

Crossover

A cable that wires a pin to its opposite pin, for example, RX+ is wired to TX+. This cable

Ethernet Cable

connects two similar devices, for example, two data terminal equipment (DTE) or data

 

communications equipment (DCE) devices.

CTS/RTS

Control signal lines on an RS-232C serial interface. These lines are needed to use hardware

 

flow control.

Cursor

A special marker on a display.

Data Bit

In asynchronous transfers, a character is composed of data bits (the actual information) and

 

framing bits (start bit, stop bit/s, parity bit). The framing bits are needed to recognize

 

whether a character has been successfully transmitted and where a new character starts.

Data

Re-coding of information. The same information is represented by less data bits. ZyXEL

Compression

modems use MNP4 and V.42 compression schemes.

Data Packet

Block of data that is framed by error control groups. A block consists of up to 256 8-bit

 

groups. Data packets are used in synchronous transfer.

Data Pump

The important module doing modulation and demodulation for a modem. The data pump is

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ZyXEL Communications 56K manual Cdr, Cng, Crc, Cts/Rts
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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.