Cabletron Systems TRXI-24 - Manual (Page 15)

REQUIREMENTS/SPECIFICATIONS
Page 2-4
2.1.2 STP Cable Specifications For The TRXI-42/44 Lobe Ports
and TPIM-T1/T4
The TRXI-42 and TRXI-44 lobe ports support IBM Type 1, 2, 6, and 9
STP cabling as described below:
• IBM Type 1 - Two STP lengths of 22 AWG solid wire for data.
Used for the longest cable runs within the walls of buildings.
• IBM Type 2 - 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.
• IBM Type 6 - 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).
• IBM Type 9 - 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).
Attenuation and Impedance
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
Frequency Impedance Attenuation
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.)