TIA TIA-485-A Electrical Characteristics of Generators and Receivers for Use in Balanced Digital Multipoint Systems
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TIA TIA-485-A Document Information:
Title
Electrical Characteristics of Generators and Receivers for Use in Balanced Digital Multipoint Systems
Telecommunications Industry Association
Publication Date:
Mar 1, 1998
Scope:
This Standard specifies the electrical characteristics of generators
and receivers that may be
employed when specified for the interchange of binary signals in
multipoint interconnection of
digital equipment. When implemented within the guidelines of this
Standard, multiple generators and
receivers may be attached to a common interconnecting cable.
An interchange system includes one or more generators connected by a
balanced interconnecting cable
to one or more receivers and terminating resistors. The electrical
characteristics of the circuit
are specified in terms of the required voltage, current, and
resistance values obtained by
measurements at the equipment interconnect points.
This Standard does not specify other characteristics, such as signal
quality, timing, protocol, pin
assignments, power supply voltage, operating temperature range, etc.,
that are essential for proper
operation of interconnected equipment. Any devices complying with this
Standard shall do so within
the ranges of those factors appropriate for the device operation, such
as power supply voltages,
and ambient temperature. It is intended that this Standard be
referenced by other standards and
specifications that specify the additional characteristics necessary
to assure satisfactory
interoperation of equipment.
This Standard is compatible with ISO/IEC 8482:1993 Information
Technology - Telecommunications and
information exchange between systems - Twisted pair multipoint
interconnections.
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