User manual US ROBOTICS SPORTSTERVOICE

[. . . ] User's Guide SPORTSTER VOICE 33. 600 and 28. 800 Faxmodem U. S. Any trademarks, trade names, service marks, or service names owned or registered by any other company and used in this manual are the property of their respective companies. © 1996 by U. S. 7770 North Frontage Road Skokie, IL 60077-2690 All Rights Reserved This manual covers installation and operating instructions for the following U. S. Robotics modems: · Sportster Voice 33. 600 and 28. 800 Faxmodem This product complies with the Low Voltage Directive (LVD) and Electromagnetic Compatibility (EMC) directive. ii 7DEOHRI&RQWHQWV Introduction to U. S. [. . . ] Binary Digit A 0 or 1, reflecting the use of the binary numbering system (only two digits). Communications channels using telephone channel modems are established at set bit rates, commonly 300, 1200, 2400, 4800, 9600, 14. 400 and higher. Thousands of bits per second are expressed as kilobits per second or kbps. Buffer A memory area used as temporary storage during input and output operations. An example is the modem's command buffer. 24 Byte A group of binary digits stored and operated upon as a unit. A byte may have a coded value equal to a character in the ASCII code (letters, numbers) or have some other value meaningful to the computer. In user documentation, the term usually refers to 8-bit units or characters. 1 kilobyte (Kbyte) is equal to 1. 024 bytes or characters; 640 Kbytes indicates 655. 360 bytes or characters. Carrier A tone signifying a connection the modem can alter to communicate data across telephone lines. Character A representation, coded in binary digits, of a letter, number, or other symbol. Characters Per Second (CPS) A data transfer rate generally estimated from the bit rate and the character length. For example, at 2400 bps, 8-bit characters with Start and Stop bits (for a total of ten bits per character) will be transmitted at a rate of approximately 240 characters per second (cps). Some protocols, such as error-control protocols, employ advanced techniques such as longer transmission frames and data compression to increase cps. Class 1 and 2. 0 International standards used between facsimile application programs and facsimile modems for sending and receiving faxes. Cyclic Redundancy Checking (CRC) An error-detection technique consisting of a cyclic algorithm performed on each block or frame of data by both sending and receiving modems. The sending modem inserts the results of its computation in each data block in the form of a CRC code. The receiving modem compares its results with the received CRC code and responds with either a positive or negative acknowledgment. Data Communications A type of communications in which computers are able to exchange data over an electronic medium. 25 Data Compression Table A table containing values assigned for each character during a call under MNP5 data compression. Default values in the table are continually altered and built during each call: the longer the table, the more efficient throughput gained. Data Mode The mode in which the fax modem is capable of sending and receiving data files. DCE Data Communications (or Circuit-Terminating) Equipment, such as dial-up modems that establish and control the data link via the telephone network. Default Any setting assumed, at startup or reset, by the computer's software and attached devices, and operational until changed by the user or software. [. . . ] To set the register, see Bit Value Result 0 1 Enables ITU-T V. 21 modulation at 300 bps for overseas calls; in V. 21 mode, the modem answers both overseas and domestic (U. S. (Default Bell 103) 1 2 Enables unencoded (nontrellis coded) modulation in V. 32 mode; rarely used part of ITU-T Recommendation V. 32. 3 8 Disables 2100 Hz answer tone to allow two V. 42 modems to connect more quickly. Some software may not accept 7200, 12. 000 and 14. 400 bps or greater result codes. 51 Register Default S28 0 8 255 Function Eliminates the V. 32 answer tones for a faster Default item, all times are in tenths of Disables all connections except V. 32 at 9600 bps. [. . . ]