Description
1-10
Cisco VCO/4K Mechanical Assemblies
3.6 Ethernet Interface
The CPU employs a Local Area Network Controller for Ethernet (LANCE) to implement an
Ethernet transceiver interface. The balanced transceiver signal lines from the CPU are coupled
to an onboard transformer to signal lines that go through the SWI, Outer B/P and control
midplane cards, and terminate on the industry-standard DB-15 connector on the
Storage/Control I/O Module faceplate. Pin and signal assignments for this DB-15 port are
listed in Table 3.
Table 3: Ethernet Port Pin and Signal Assignments
To implement Ethernet links, you must purchase the optional Ethernet Communications
Package available from Cisco Systems. This package contains supporting software and the
Cisco VCO/4K Ethernet Guide which covers the cabling requirements and implementation
strategies. You must provide cables, transceivers and other components to establish Ethernet
links.
Pin
Signal
Signal Name
2
C+
Col (Input)
3
T+
Tr (Output)
5
R+
R (Input)
6
GND
Ground
9
C–
Collision – (Input)
10
T–
Transmit – (Output)
12
R–
Receive – (Input)
13
+12V
+12 Vdc Power
