First And Second Rs-232C Serial Port Cable Pin Outs For Connection To Terminal Equipment; Connecting An External Modem To The Vp - Toshiba VP 300 Installation Instructions Manual

3-12 Installation and Maintenance Manual
To Terminal (DTE)
For proper operation, DTR (pin 20) must be exerted TRUE by the terminal. RTS (pin 4) must be
exerted TRUE by the terminal when the terminal is able to accept data, or be left unconnected.
Terminal/teleprinter equipment having pins 1 and 7 connected together may cause intermittent
problems with the VP 300. Terminal/teleprinters requiring Data Set Ready (DSR) may require
connecting pins 6 and 8 together, or 8 and 20 together at the terminal end of the RS-232C cable. If you
have a problem or question with your terminal/teleprinter, call Toshiba.
I Connecting an External Modem to the VP 300
An external modem may be used if a dedicated modem connection is required, or if a modem of baud
rate different from the VP 300 internal modem is required. A modem that supports standard baud rate
(300 to 9600 baud) may be connected to the VP 300 System Terminal Port.
Toshiba VP Systems Release 7.1 July, 1994
1
2
3
4
5
7
8
20
Figure 3-3 First and Second RS-232C Serial Port Cable Pin-outs
for Connection to Terminal Equipment (DTE)
Table 3-5 External Modem Pin-outs
Modem
VP 300
Pin Number
Pin Number
2 3
3 2
5 4
4 5
7 7
8 20
8
20
1 Protection Ground
2 TX
3 RX
4 RTS
5 CTS
7 Signal Ground
8 DCD
20 DTR
Modem Signal
Name/Function
Transmit Data
Receive Data
CTS
RTS
Signal Ground
DCD
DTR
VP 300 (DCE)
VP 300
Name/Function
Receive Data
Transmit Data
RTS
CTS
Signal Ground
DTR
DCD