CHAPTER

4-1
Cisco VCO/4K Mechanical Assemblies
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4
Storage/Control I/O Module
The Storage/Control I/O Module performs two functions: to connect outside interfaces to the system
controller and to house the hard disk drive. It plugs into the back of the VCO/4K system and provides
the I/O interfaces for system peripheral devices and host communication links using four serial ports,
one Ethernet port, one printer port and one SCSI connector. Figure4-1 shows the front panel of the
Storage/Control I/O Module.
Physical interfaces to host computers and peripheral devices are provided on the front panel of the
Storage/Control I/O Module. Two serial ports are available for SIO host links, and another two are
dedicated to supporting the local system administration console and a remote maintenance modem. An
EthernetTransceiver interface and parallel printer connector are also located on the Storage/Control I/O
Module.

Specifications

Part Number Contact your Cisco Systems sales representative
Interfaces FourEIA/TIA-232 serial ports (master console, remote maintenance modem,
and two SIO host links)
One Ethernet transceiver interface
One Centronics-type parallel interface (system printer)
One SCSI connector (reserved for future use)
Power Requirements: Maximum Typical
Hard Disk Drive +5 VDC 0.4A 0.33A
+12 VDC 1.0A 0.17A
Ethernet +5 VDC 0.5A 0.5A
+12 VDC 0A 0A
EIA/TIA-232 +5 VDC 0A 0A
+12 VDC 0.1A 0.05A