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Phone 800/695 0447 Fax 512/990 7962 www.3M.com/volition 3
VOL-2008 Mini-Hub
To calculate other distances for
fiber use the following formula:
Fiber distance (m) - 320 – UTP length
(m) x 1.112 (all units in meters). The
VOL-2008 Mini-Hub is a Class II
repeater. The following diagram
illustrates some operating distances
on fiber and copper.
10 m UTP
308 m Fiber
Example 1
100 m UTP
200 m Fiber
Example 2
Specifications
Operating temperature 0° to 50°C (-32° to 122°F)
Storage temperature -30° to 60°C (-22° to 140°F)
Operation humidity 5% to 95% non-condensing
EMI certifications CE marking
FCC Class A
Dimensions 31.1 cm x 11.5 cm x 4.45 cm
12.24 in. x 4.53 in. x 1.75 in.
Weight 1.27 kg (2.8 lbs.) per unit
Shipping weight 1.8 kg (4 lbs.)
Applications
Appendix A – Collision Domain
and Distance
In shared fast Ethernet™, the collision
domain limits the operating distance of
the network. In any collision domain,
the round trip propagation delay must
not exceed 512 bit times. Each bit
time in fast Ethernet is 10 ns. The
following table gives typical delays as
specified by the IEEE 802.3 standard.
Applications
Component Round Trip Delay Maximum Delay
in Bits/Meter
Two TX/FX DTE’s N/A 100
Cat 3 Cable Segment 1.14 114 (100 m)
Cat 5 Cable Segment 1.112 111.2 (100 m)
Fiber Cable 1.00 412 (412 m)
Class I Repeater N/A 140
Class II Repeater TX/FX N/A 92