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BelAir100SN Installation Guide
Infrastructure Requirements for the BelAir100SN
May 18, 2010
Confidential
Document Number BDTK11001-A01 Preliminary
Ethernet
The BelAir unit’s has a 10/100/1000 BASE-TX Ethernet port that is compliant
to the IEEE 802.3 standard. This port has a reach of 320 feet (approx. 100 m)
using standard Category 5 twisted pair.
The Ethernet port uses a shielded RJ45 connector. The pinout is given in
Table 6
and
Figure 5 on page 14
.
where:
Pmin = +17 dBmV, 1280 kHz modulation rate
Pmin = +20 dBmV, 2560 kHz modulation rate
Pmin = +23 dBmV, 5120 kHz modulation rate
Table 5: Cable Modem Output Levels (Three or Four US Channels in TCS)
TDMA Modulation
Output Level
Table 6: Ethernet Pinout for BelAir100SN
Contact
Function
1
Transmit 0 +
2
Transmit 0 -
3
Receive 0 +
4
Transmit 1 +
5
Transmit 1 -
6
Receive 0 -
7
Receive 1 +
8
Receive 1 -