Cabletron Systems E2210 Installation Manual page 39

TECHNICAL SPECIFICATIONS
This allows links of up to 126 meters (413.4 feet) using standard
24 AWG UTP wire and two patch panels. Higher quality, low
attenuation cables may be required if you want to use links
greater than 126 meters.
Insertion loss
The insertion loss is 11.5 dB maximum for 10BASE-T links at all
frequencies between 5.0 and 10.0 MHz. This includes
attenuation of cables, connectors, patch panels, and reflection
losses due to impedance mismatches.
Impedance
Unshielded twisted pair cable is typically between 85 and
110 ohms. Shielded cable, such as type 1 cable, is typically
150 ohms which can increase the signal reflection. Cabletron
Systems 10BASE-T twisted pair products will work on
shielded twisted pair cable with 75 to 165 ohms impedance.
Jitter
Not more than 5.0 nanoseconds for a 10BASE-T link.
Delay
Must not exceed 100 nanoseconds for a 10BASE-T link.
Crosstalk
Crosstalk is caused by signal coupling between cable pairs
within a multi-pair cable bundle. Crosstalk should not be a
problem if the cable meets all other requirements.
Noise
Noise can be caused by either crosstalk or externally induced
impulses. Impulse noise can cause data errors if the impulses
occur at very specific times during data transmission. If you
suspect noise-related data errors, it may be necessary for you to
reroute the cable or eliminate the source of the impulse.
Temperature
Multi-pair, PVC 24AWG telephone cables have an attenuation
of approximately 8 to 10 dB/100 meters at 20 C.
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