HiPath HG 1500 boards
Installation For internal use only
A31003-K5020-S100-6-7620
2-8 Service Manual
lan2de.c02
The TT1/2 and RT1/2 signals are not necessary for data transmission. They repre-
sent a signal termination of 100 ohms (known as a Bob Smith Termination) for the two
unused wire pairs in a four-pair twisted-pair cable.
Figure 2-4 Adapter for HXGM backplane
Table 2-7 RJ45 socket assignment (HXGM)
Pin Signal I/O Function
1 TDP O Transmit Data +
2 TDN O Transmit Data -
3 RDP I Receive Data +
4 (TT1) I Transmit Termination 1
5 (TT2) I Transmit Termination 2
6 RDN I Receive Data -
7 (RT1) I Receive Termination 1
8 (RT2) I Receive Termination 2
RJ45 socket
1SU-SIPAC connector
Metal housing
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