4-7
Cisco VCO/4K Mechanical Assemblies
78-10334-03
Chapter 4 Storage/Control I/O Module
Description
Figure 4-4 Control Midplane
Serial Ports 1 and 2
Serial Port 1/Console and Serial Port 2/TTY01 are dedicated ports for connecting the system master
console and remote maintenance modem, respectively. These standard female DB-25 ports connect to
the console and modem via EIA/TIA-232 cables. Table 4-1 shows the pin and signal assignments for
these ports. For additional information on connecting peripheral equipment, refer to the Cisco VCO/4K
Hardware Installation Guide.
50168
A-side connector for the
Storage/Control I/O module
B-side connector for the
Storage/Control I/O module
Table 4-1 Serial Ports 1 and 2 Pin and Signal Assignments
1
1. All pins not identified are no-connection.
Pin Signal Name Description/Direction
2 TxD Transmit Data (terminal to modem)
3 RxD Receive Data (modem to terminal)
4 RTS Request to Send (terminal to modem)
5 CTS Clear to Send (modem to terminal)
6 DSR Data Set Ready (modem to terminal)
7 GND Chassis Ground
8 DCD Data Carrier Detect (modem to terminal)
20 DTR Data Terminal Ready (terminal to modem)
