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Cisco VCO/4K Mechanical Assemblies
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Chapter4 Storage/Control I/O Module
Hardware Configuration
Youcan position the jumpers in locations JP13 and JP18 (under the “To Terminal”etching) to configure
the CPU as a DCE termination. Moving the jumpers to these locations supports the following SIO
connections:
•Straight-through cables connecting the system to a host terminal (DCE to DTE)
•Crossover (null modem) cables connecting the system to a modem (DCE to DCE)
Refer to the Cisco VCO/4K Hardware Installation Guide for more information on serial cable
requirements.
Note Whenmodifying jumper positions on Storage/Control I/O Module boards, you must move
all seven jumpers to the new location to ensure operation.
Serial Ports 1 Through 4
Serial ports 1 through 4 can be configuredas a modem (DCE) for connection to a terminal, or terminal
(DTE) for connection to a modem. The Storage/Control I/O Module card’s serial ports are configured
for shipment in the DCE configuration. Table4-4 illustrates jumper positions for DCE and DTE.
Refer to Figure 4-8 for the jumper locations on the Storage/Control I/O Module card.
Figure4-8 Jumper Locations on the Storage/Control I/O Module Card
Seven jumpers are installed at jumper locations JP1, JP11, JP13, JP14, JP16, JP17, JP18 and JP19,
connecting pins 1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14 as shown in Figure4-9.
Table4-4 Jumper Positions for DCE and DTE Modem Connections
Port DTE Operation DCE Operation
1 Jumper –TO MODEM JP11 Jumper—JP1 TO TERMINAL
2 Jumper – TO MODEM JP17 Jumper—JP16 TO TERMINAL
3 Jumper – TO MODEM JP14 Jumper—JP13 TO TERMINAL
4 Jumper – TO MODEM JP19 Jumper—JP18 TO TERMINAL
Hard disk drive
TO MODEM
JP19
TO MODEM
JP17
TO MODEM
JP11
TO MODEM
JP14
TO TERMINAL
JP18
PORT 4
JP16 JP13 JP1
TO TERMINAL TO TERMINAL TO TERMINAL
PORT 2 PORT 3 PORT 1
JP15 J21
J20
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