IBM 866011U - Netfinity 5500 - 8660, Hardware Maintenance Manual

Page: 178 / 402

Ethernet port:
The system board in the Netfinity 5500
contains an Ethernet controller. The controller has an
external RJ-45 connector on the rear of the server that is
used with a category 3, 4, or 5 unshielded twisted-pair
(UTP) cable. The connector enables an Ethernet network
to attach to the internal transceiver in the server.
Note
The 100BASE-TX Fast Ethernet standard requires that
the cabling in the network is Category 5 or higher.
See “Configuring the Ethernet controller” on page 55 for
additional information about the Ethernet controller.
Table 6 shows the pin-number assignments for the RJ-45
connector. These assignments apply to both 10BASE-T
and 100BASE-TX devices.
10BASE-T or 100 BASE-TX
UTP Cable
RJ-45 Modular Plug Connector
1
2
3
Pins 6
Note
The wrap plug must have pin 1 connected to pin 3
and pin 2 connected to pin 6.
Table 6. Ethernet Connector Pin-Number
Assignments
Pin Signal Pin Signal
1 Transmit data
+
5 Reserved
2 Transmit data
−
6 Receive data
−
3 Receive data
+
7 Reserved
4 Reserved 8 Reserved
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Netfinity Server HMM