Operation Manual

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CHAPTER 3
Basics of the Cable Test
3.1. Testing of cables and relevant requirements
The following sections describe typical setup for permanent link and channel link testing.
Illustration 3.1. Illustration of test setup
The area marked with P indicates the typical test setup of a Permanent Link.
The area marked with C indicates the typical test setup of a Channel Link.
3.1.2. Setup for Permanent Link Test
The standards ANSI, EIA, TIA and ISO all differentiate between permanent link and channel
link on specifications for testing of communication networks. A permanent link consists of up
to 90 meters of horizontal cabling. (Maximum length limit applies to TIA standards only.) The
permanent link shown above serves to certify the installation of the horizontal cabling before
network connection and user hook-up. Adapters, patch cords and jumpers are excluded from
testing.
3.1.3. Setup for Channel Link Test
A channel link includes all components of a cabling system. It consists of up to 90 meters
horizontal cabling, including patch cords, jumpers, and test adapters at each cable end. The
channel link shown above serves to certify the network installation, including the horizontal
cable line and patch cord.