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LOSSARY
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speed when line quality is impaired, and fall back further as necessary.
They fall forward to the next higher speed when line quality improves.
V.32 terbo
Modulation scheme that extends the V.32 connection range: 4800,
7200, 9600, 12K, 14.4K, 16.8K, 19.2K, and 21.6 Kbps. V.32 terbo
modems fall back to the next lower speed when line quality is
impaired, and fall back further as necessary. They fall forward to the
next higher speed when line quality improves.
V.34
An ITU-T standard that allows data rates as high as 28.8 Kbps.
V.35
An ITU-T standard trunk interface between a device and a packet
network, using signaling of at least 19200 bps.
V.42
An ITU-T standard for modem communications that defines a
two-stage process of detection for LAPM error control.
V.42 bis
An extension of ITU-T V.42 that defines a specific data compression
scheme for use with V.42 error control.
V.Fast Class (V.FC)
Proprietary modulation scheme developed by Rockwell International for
data communication speeds up to 28.8 Kbps.
word length
The number of bits in a data character without parity, start or stop bits.
XMODEM
The first of a family of error control software protocols used to transfer
files between modems. These protocols are in the public domain and
are available from many bulletin board services.
XON/XOFF
Standard ASCII control characters used to tell a device to stop/resume
transmitting data. In most systems typing <Ctrl>-S sends the XOFF
character. Some devices, including the Business Modem, understand
<Ctrl>-Q as XON; others interpret the pressing of any key after
<Ctrl>-S as XON.
YMODEM
An error-correcting file transfer protocol that is related to, but faster
than, XMODEM.
ZMODEM
An error-correcting file transfer protocol that is related to, but faster
than, XMODEM or YMODEM.
Содержание OfficeConnect 56K Business
Страница 1: ... http www 3com com 3Com OfficeConnect 56K Business Modem Command Reference Published January 1999 ...
Страница 14: ...4 ABOUT THIS GUIDE ...
Страница 32: ...1 18 CHAPTER 1 CONNECTING TO YOUR ISP ...
Страница 42: ...3 6 CHAPTER 3 MODES OF OPERATION ...
Страница 64: ...7 4 CHAPTER 7 CONTROLLING EIA 232 SIGNALING ...
Страница 72: ...8 8 CHAPTER 8 CONTROLLING DATA RATES ...
Страница 80: ...9 8 CHAPTER 9 ACCESSING AND CONFIGURING THE BUSINESS MODEM REMOTELY ...
Страница 96: ...11 6 CHAPTER 11 FLOW CONTROL ...
Страница 108: ...12 12 CHAPTER 12 HANDSHAKING ERROR CONTROL DATA COMPRESSION AND THROUGHPUT ...
Страница 112: ...13 4 CHAPTER 13 DISPLAYING QUERYING AND HELP SCREENS ...
Страница 124: ...14 12 CHAPTER 14 TESTING THE CONNECTION ...
Страница 132: ...15 8 CHAPTER 15 TROUBLESHOOTING ...
Страница 162: ...B 14 APPENDIX B ALPHABETIC COMMAND SUMMARY ...
Страница 168: ...C 6 APPENDIX C FLOW CONTROL TEMPLATE ...
Страница 210: ...14 GLOSSARY ...