User's Manual

2-4 Chapter 2: Installing the Hardware Infrastructure
General Layout Instructions
• The cable length between any two devices (10/100Base-T
compatible Ethernet hub to CBS or CBS to CBS) cannot exceed 100
m (328 ft.).
• The maximum number of Ethernet levels beyond the primary CBS
is three (3).
• The maximum total cable length is as follows:
Cable Maximum Cable Length
Ethernet (primary CBS to last CBS in chain) 300 m (984 ft.)
Power supply to last CBS in the chain 162 m (532 ft.)
• Use only NCR authorized communication cable.
• Communication cables must be secure and locked into their
connectors.
• The maximum number of CBSs per store is 85.
• If the communication cable is routed through an exposed area, such
as up the side of a wall, across the top of a freezer where
merchandised is stacked, or in an elevator shaft, it must be in a
conduit and the conduit must be connected to the building ground.
• The minimum distance between a communication cable and a
fluorescent, neon, or incandescent light is 30 cm (12 in.).
• Minimum distance between a transmit or receive antenna and a
neon light is 2.43 m (8 ft.).
• All communication cable connections must be protected from
electrical and mechanical deterioration. The deterioration of
communication cable connections due to corrosion or electrolysis,
especially in a humid or corrosive atmosphere, may result in
electrical noise.