3Com 7754 Installation Manual page 78

78 A A: S
PPENDIX WITCH
Electrical Port
Connector
7750 C
ABLES
Figure 45 The AUX Cable
Enlarged A side Enlarged A side
Table 54 lists the AUX cable pin-outs.
Table 54 AUX Cable Pin-outs
RJ-45
1
2
3
4
5
6
7
8
Figure 46 illustrates the RJ-45 connector.
Figure 46 The RJ-45 Connector
PIN #8
PIN #1
Table 55 lists RJ-45 MDI port pin-outs.
Table 55 RJ-45 MDI Port Pin-outs
Pinout 10BASE-T/100BASE-TX
Signal
1 Tx+
2 Tx-
DB25 Male DB25 Male
Label Label
Signal Direction
RTS --->
DTR --->
TXD --->
CD <---
GND ---
RXD <---
DSR <---
CTS <---
1000BASE-T
Function Signal
Send data BIDA+
Send data BIDA-
8P8C Plug 8P8C Plug
DB9Male DB9Male
DB-25 DB-9
4 7
20 4
2 3
8 1
7 5
3 2
6 6
5 8
Function
Send data to direction A
Receive data from direction A
Enlarged B side Enlarged B side
Enlarged C side Enlarged C side