Visara 1486 - Manual (Page 15)

701334-002 2-3
Customer Installation
Specify the total length of each cable when ordering, including the distance from the
display station to the next attaching device (host system, remote workstation controller,
or another display station) plus a sufficient length of cable to reach the cable connection
on the units on both ends of the cable (approximately 6 feet or 2 meters).
IBM Cabling System Cable
The IBM Cabling System cable must meet IBM specifications.
Telephone Twisted-Pair Cable
The telephone twisted-pair cable must meet the following specifications:
• #22 or #24 AWG
• Solid copper twisted-pair wires with at least two twists per 12 in (308 mm)
• A maximum of 28.6 ohms DC resistance per 1000 ft (305 m)
• Impedance characteristics:
– 90 to 120 ohms at 256 kHz
– 87 to 118 ohms at 512 kHz
– 85 to 115 ohms at 772 kHz
– 84 to 113 ohms at 1000 kHz
Maximum attenuation per 1000 ft (305 m)
– 4.00 dB at 256 kHz
– 5.66 dB at 256 kHz
– 6.73 dB at 256 kHz
– 8.00 dB at 1000 kHz
• In addition, all type 3 Specified Media must meet at least one of the following industry
specifications:
– ANSI/ICEA S-80-576-1983
– REA PE-1
– Bell System 48007