Ositech comm Trumpcard Data/Fax Modem Manual Do Utilizador
User’s Guide and Reference
1 - 5
Introduction
Industry Standards
V.21
V.21 refers to a standard set by ITU-T for 300 bps Modem
communications. North American manufactured modems usually follow
the Bell 103 standard.
communications. North American manufactured modems usually follow
the Bell 103 standard.
V.22
V.22 refers to the standard set by ITU-T for 1200 bps Modem
communications. The V.22 standard is compatible with the Bell 212A
standard used in North America.
communications. The V.22 standard is compatible with the Bell 212A
standard used in North America.
V.22bis
V.22
bis refers to the standards set by ITU-T for 2400 bps Modem
communications.
V.23
V.23 refers to the standards set by ITU-T for 1200 bps Modem
communications with a 75 bps back channel. V.23 is primarily used in
the U.K.
communications with a 75 bps back channel. V.23 is primarily used in
the U.K.
V.32
V.32 refers to the standard set by ITU-T for 9600 and 4800 bps Modem
communications.
communications.
V.32bis
V.32
bis refers to the standard set by ITU-T for 14,400, 12,000, 9600,
7200, and 4800 bps Modem communications.
V.34
V.34 refers to the standard set by ITU-T for 28,800 to 2400 bps Modem
communications.
communications.