C-20
Hardware Specifications
C.3.1.2 UTP Cable Specifications
The table below lists the recommended cable specifications for all Cabletron
ATM adapters that use UTP cabling to ensure optimal adapter and switch
performance.
C.3.1.3 UTP Pinouts
All ATM Adapters that can be connected using copper cabling use a standard
RJ-45 connector with the following pinouts:
Description Value
AWG 24
Impedance (Ω)100 ±15%
Attenuation (dB/1000 ft Max) 25 dB @ 16 mHz
52 dB @ 62.5 mHz
67 dB @ 100 mHz
Maximum Run 100 m *
Connector Style RJ-45
* Within the 100 meter run, a maximum of two connections are permissible.
Number Transmit/Receive
1 Transmit (+)
2 Transmit (-)
3 not used
4 not used
5 not used
6 not used
7 Receive (+)
8 Receive (-)