Cabletron Systems TRXI-42 Manual Do Utilizador

 

Page 2-4

 

The TRXI-42 and TRXI-44 lobe ports support IBM Type 1, 2, 6, and 9 
STP cabling as described below:

•

 

 - Two STP lengths of 22 AWG solid wire for data. 

Used for the longest cable runs within the walls of buildings.

•

 

 - Similar to Type 1 data cable, but having four 

additional UTP lengths of 22 AWG solid wire carried outside of 
the shield casing. Typically used for voice communication and 
often used to wire cable runs within the walls of buildings.

•

 

 - Two STP lengths of 26 AWG stranded wire for 

data. This type is used in patch panels or to connect devices
to/from wall jacks. Attenuation for Type 6 cable is 3/2 x Type 1 
cable (66 m of Type 6 =100 meters of Type 1).

•

 

 - Similar to Type 1, but uses 26 AWG solid wire. 

Attenuation for Type 9 cable is 3/2 x Type 1 cable
(66 m of Type 9 = 100 meters of Type 1).

 

The attenuation values shown in Table 2-3 include the attenuation of 
the cables, connectors, patch panels, and reflection losses due to 
impedance mismatches in the segment.

Table 2-3. STP Cable Specifications

 

Types 1 & 2

4 MHz

16 MHz

150

 

Ω

 

 + 15%

150

 

Ω

 

 + 15%

<22 dB/km (6.7 db/1000 ft.)
<45 dB/km (13.7 db/1000 ft.)

Types 6 & 9

4 MHz

16 MHz

150

 

Ω

 

 + 15%

150

 

Ω

 

 + 15%

<33 dB/km (10 db/1000 ft.)
<66 dB/km (20 db/1000 ft.)