Description
Storage/Control I/O Module 1-7
Table 1: Serial Ports 1, 2 and 3 Pin and Signal Assignments
a
a
All pins not identified are no-connection
Master console and remote maintenance modem operating parameters (Baud Rate, Stop Bits,
Bits per Character and Parity) defined in the system database via the Peripheral
Configuration screen. Refer to the Cisco VCO/4K System Administrator’s Guide for more
information.
Figure 5: I/O Module To Master Console – Cable Wiring Diagram
NOTE: You can employ a 25-conductor, straight-thru cable to connect a master
console to the Storage/Control I/O Module; however, only the conductors shown
above are used.
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)
Pin 2
Pin 3
Pin 7
Pin 2
Pin 3
Pin 7
Serial Port 1/Console
(DB-25P)
Male
VT220/320 Console
(DB-25S)
Female
(3-Conductor, Straight-Thru)
TxD
RxD
GND