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Page B-4

 consists of two STP of 26 AWG stranded wire for data. 

Because of its high attenuation, Type 6 is used only in patch panels or to 
connect devices to/from wall jacks

. Attenuation for Type 6 cable is 3/2 x 

Type 1 cable (attenuation for 66 m of Type 6 = attenuation for 100 m of 
Type 1).

 is similar to Type 1, but uses 26 AWG solid wire. Like Type 6, 

because of its high attenuation, Type 9 is used only in patch panels or to 
connect devices to/from wall jacks

. Attenuation for Type 9 cable is 3/2 x 

Type 1 cable (66 m of Type 9 = 100 m of Type 1).

The maximum lobe length attainable under ideal conditions, is shown in 
Table B-4. Cable routing, connector attenuation, noise and crosstalk can 
adversely affect the maximum lobe length.

If cable types are to be mixed in the LAN, compensations must be made 
for the different cable attenuations. For example, Type 6 & 9 cables can be 
run for only 2/3 the distance of Type 1: 100 meters of Type 1 

≈

   66 meters 

of Types 6 or 9)

Table B-3.  STP Cable Type Specifications.

1 & 2

 4 MHz

≤

 150

Ω

  

±

15%

≤

 22 dB

(

≤

   6.7 dB)

16 MHz

≤

 150

Ω

  

±

15%

≤

 45 dB

(

≤

 13.7 dB)

6 & 9

 4 MHz

≤

 150

Ω

  

±

15%

≤

 33 dB

(

≤

 10.0 dB)

16 MHz

≤

 150

Ω

  

±

15%

≤

 66 dB

(

≤

 20.0 dB)