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3 Interface Devices and Mass-Storage Drives
HP Ethernet 10/100 BaseT Network Board
HP Ethernet 10/100 BaseT Network Board
The HP Ethernet 10/100 BaseT Network Board is supplied on all models of
the HP Vectra XA 5/xxx PC. It is based on the AMD PCnet-PCI-II 79C971
network processor chip.
On desktop models, it is installed in a dedicated PCI accessory slot
underneath the internal, hard disk drive, rear-shelf, plugged into the PCI
Junior slot that is situated on the rear of the double-sided backplane board.
On the rear panel there are two RJ-45 unshielded twisted-pair (UTP)
connectors, whose pin-out is shown in the diagram on page 62. One is fully
compliant with the 10-BaseT, 10 Mbits per second, ISO 8802-3 (IEEE/ANSI
802.3) standard. It supports the Remote Power-On (RPO) feature that is
described on page 71.
The other RJ-45 connector is fully compliant with the 100-BaseT, 100 Mbits
per second, ISO 8802-3 (IEEE/ANSI 802.3u) standard. This connector
supports the Remote Wake-Up feature, but not Remote Power-On.
The two lights indicate which of the network sockets is connected (they are
not link lights or activity lights). The controller automatically detects which
of the two connectors is presently in use.
There is a socket, on the network board, to support an Option ROM of up to
256 KB. This is not compatible with the Option ROM chip from the
Enhanced Ethernet Network board.
Remote start
RJ-45 UTP 10 BaseT network
Option ROM socket
Network
Processor
Chip
20 MHz
50 MHz clock
clock
SRAM
100BT Phy layer
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RPO logic
Network connected light
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RJ-45 UTP 100 BaseT network
Network connected light