Black Box IC165A, User Manual

Page: 9 / 34

8
USB DIRECTOR/4-PORT HUB
1. Specifications
Software Requirements
— USB-enabled opera-ting
system such as Windows
®
95 OSR2.1 or later,
Windows 98, or Windows NT
®
5.0, Windows 2000,
any Macintosh operating system with USB support
Cable Wiring
— 90
Ω
±15% unshielded or shielded for
low-speed devices; 90
Ω
±15% shielded for full-
speed devices
Maximum Individual Cable Length
— Full-speed device:
5 meters (16.4 ft.) shielded cable;
Low-speed device: 3 meters (9.8 ft.)
unshielded/shielded cable
Wiring Topology
— Tiered star, point-to-point
connection
Access Method
— Differential and bi-directional per
USB spec 1.0; 12 Mbps full speed and 1.5 Mbps
low speed; The hub supports both full
and low speeds. The hub is considered a
full-speed device.
Maximum Hubs in Daisychain
— Five (six cables, end-to-
end maximum)
Maximum Devices
— 127
Standards Conformance
— USB specification 1.0