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Test configurations
Chapter 2
There are two commonly used configurations for certifying installed cabling.
Link configuration
Link
Probe
Telecommunications
Closet
WireScope
The Link configuration is intended for use in facilities still in the construction
stage. The link configuration does not include the user patch cords at either end
of the cabling run because these cords are often not installed until after the
facility is occupied. Because the link configuration does not include the two
additional connections which would be added when the patch cords are
connected, performance standards are more stringent for cabling tested using the
link configuration.
The WireScope and DualRemote attach to the link under test via special link test
probes, which are terminated in male modular-8 plugs.
Channel configuration
User Patch
Cord
Telecommunications
Channel
Closet
Probe
WireScope
The channel test configuration is intended to provide a comprehensive end-to-
end cabling performance certification. The channel configuration does include
the user patch cords at both ends of the cabling run. The pass/fail limits applied
when testing with the channel configuration are less stringent than for the link
configuration in order to account for the performance degradation inherent in the
two additional modular connections.
Structured Cabling Link
Telecommunications
Structured Cabling Link
Cable Testing Overview 14
Link
Probe
Outlet
DualRemote
User Patch
Cord
Telecommunications
Channel
Outlet
Probe
DualRemote
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