Rs-232-d pin assignments, Rs-232-d pin assignments” on, For a description of the pins on the isdn modem’s – Farallon Communications 612 User Manual
Page 139
Technical Specifications
C-3
RS-232-D pin assignments
The asynchronous RS-232-D por t on the ISDN modem, labeled
RS232, is a standard DB-25 female connector. The ISDN modem
asynchronous por t pin assignments, shown in the following table,
conform to standard definitions for data communications equipment
(DCE).
Pin #
Pin Name
Signal Direction
1
Shield Ground (GND)
—
2
Send Data (SD)
To ISDN modem
3
Receive Data (RD)
From ISDN modem
4
Request to Send (RTS)
To ISDN modem
5
Clear to Send (CTS)
From ISDN modem
6
Data Set Ready (DSR)
From ISDN modem
7
Signal Ground (GND)
—
8
Carrier Detect (DCD)
From ISDN modem
18
Local Loopback
From ISDN modem
20
Data Terminal Ready (DTR)
To ISDN modem
21
Remote Loopback
To ISDN modem
22
Ring Indicator (R)
From ISDN modem
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