Low-Speed Full-Duplex Interface; Local Attachment Interface-Line Set If - IBM 3704 Reference Manual

I BM 3704/3705
Transmitted Data
Received Data
...
--
Line
Data Terminal Ready
Set
1F
Data Set Ready
-
- -
Data Rate Selector
Request to Send
Clear to Send
-
- -
Signal Ground
Received Data
3
Transmitted Data
2
Data Set Ready
6
Data Terminal Ready 20
Received Line Signai Detector
8
Request to Send
4
Clear to Send
5
7
......
--
__.,
-
..
-
__..
..
IBM
Terminal
Figure 2. Local Attachment Interface-Line Set IF
Low-Speed Full-Duplex Interface
The low-speed full-duplex interface provides an BIA RS 232C/CCITT V.24
interface for simultaneous transmit and receive operations. The interface (Line
Set lB) lines are described in "BIA RS 232C/CCITT V.24 Interface" and are
shown in Figure 3.
JO
IBM 3704 and 3705 Communications Controllers Original Equipment Manufacturers' Information