Video Features; Standard; Video Communication Standard - Diamond SupraExpress 56e Manual

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This section applies only to products with video standard capabilities. It includes the following
topics:
• V.80 S
TANDARD
• V C
IDEO
V.80 S
TANDARD
V.80 is the ITU standard that defines the control of data from the modem. The section on 8-bit
commands defines a way for an asynchronous DTE (such as your PC) to control a synchronous bit
stream (such as video) on the modulating carrier (such as a standard phone line). Thus, the V.80
standard makes video phone communication possible over standard phone lines by directing the
modem how to convert video phone data from synchronous to asynchronous mode for transmission
across analog telephone lines.
In addition to video phone capability, the V.80 standard also provides the AT+ES Error Control
Selection. Refer to the AT+ commands section of the AT Command list (Appendix B) for additional
information on +ES commands.
V C
IDEO
As with previous ITU standards, V.80 is an enormously complex protocol document, containing
many subsections and definitions. The video communication standards are specifically identified as
H.323 and H.324.
OMMUNICATION
OMMUNICATION
V
IDEO
S
TANDARD
S
TANDARD
F
EATURES
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