AT&T 610 - Auxiliary Port

C01IIIlUn1cations
Page 9- 6
A call may be originated at the terminal or at the remote
host computer, either can send data or receive data regardless
of where the call was originated. The terminal can receive
messages any time it is called, provided that the power is on.
Auxiliary Port
PROTECTIVE GROUND
I
AA
SIGNAL
GROUND
7
AB
..... TRANSMITTED DATA
2
BA
.....
RECEIVED DATA
BB ..
TERMINAL
CA .....
3 REQUEST TO SEND'"
: CLEAR TO SEND ..
AUXILIARY
AUXILIARY
I CB .....
DEVICE
Pin I
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
PORT
DATA SET READY
6
CC
~
DATA CARRIER DETECT
~
CF
~
DATA TERM INAL READY
CD
...
L..
.....
~
Figure 9-8. Printer Cable Leads
Table 9-B. Aux~liary Port Interface Pins
Protective Ground -- equipment frame and ac power ground
Transmitted Data (SO) -- data originated by the
auxiliary device
Received Data (RD)
data originated at the terminal
Request to Send (RTS) -- tied to Clear to Send at
terminal
Clear to Send (CTS) -- tied to Request to Send at
terminal
Data Set Ready (DSR) -- signal to auxiliary device from
terminal (always on when terminal power is on)
Signal Ground (AB) -- common ground reference between
terminal and ~uxiliary device
Data Carrier Detect (DCD) signal to auxiliary device
from the terminal (always on when terminal power is on)
Pin 20 Data Terminal Ready (DTR)
device to terminal
signal from auxiliary
User's Guicle
August 1985