Netcomm V85 Guía De Instalación Rápida

16

V85 Desktop VoIP Phone Quick Start Guide

 

YML771 Rev1

There are two types of the wiring: Straight-Through Cables and Crossover Cables. Category 5 UTP/

STP cable has eight wires inside the sheath. The wires form four pairs. Straight-Through Cables has 

same pinouts at both ends while Crossover Cables has a different pin arrangement at each end.
In a straight-through cable, wires 1,2,3,4,5,6,7 and 8 at one end of the cable are still wires 1~8 at the 

other end. In a crossover cable, the wires of 1,2,3,6 are reversed so that wire 1 become 3 at the other 

end of the cable, 2 becomes 6, and so forth.
To determine which wire is wire 1, hold the RJ-45 cable tip with the spring clip facing towards the 

ground and the end pointing away from you. The copper wires exposed upwards to your view. The 

first wire on the far left is wire 1. You can also refer to the illustrations and charts of the internal

wiring on the following page.

Figure 3

 

Wire  

Becomes

 

1 

1

 

2 

2

 

3 

3

 

6 

6

Figure 4

 

Wire  

Becomes

 

1 

3

 

2 

6

 

3 

1

 

6 

2

Note:  

To prevent loss of signal, make sure that the length of any twisted-pair 

connection does not exceed 100 metres.