232ABRT3798 pg. 1/1
B&B Electronics -- September 1998
This product designed and manufactured in USA of domestic and imported parts by
Free-Up Phone Lines When The Modem Isn't Being Used
Model 232ABRT
Description
The 232ABRT is an inline device that is placed between your PC and modem. The 232ABRT hangs up the modem after it has been
idle for a selected amount of time.
Features
All lines
except line 20 (DTR) pass straight through.
Communications can be monitored from the computer to the modem, or from the modem to the computer.
The amount of time the monitored line must be idle before DTR is dropped can be jumper set to 4 sec, 2 min 8 sec, 4 min 16 sec, or
34 min 8 sec. Pads have been left on the additional lines of the 4060 chip to allow the user to select other available times should it be
necessary.
DTR is held high on the modem side until the monitored line has been idle for the selected amount of time. Then DTR is held low for
11 seconds and is then raised again.
An LED turns on when DTR is held low.
Connection to the computer side is made through a DB25 female connector with female connective hardware.
Connection to the modem side is made through a DB25 male connector with female connective hardware.
The unit is powered by 11 to 16 VDC at 20 mA maximum.
Setup
To hang up after the communication from the computer to the modem has been idle set JP2 to TD/2.
To hang up after the communication from the modem to the computer has been idle set JP2 to RD/3.
Set JP4 to 4 sec, 2 min 8 sec, 4 min 16 sec, or 34 min 8 sec as the minimum time that the monitored line must be idle before DTR
lowers.
Specifications
Power Supply
Input Voltage:
11 to 16 VDC
Input Current:
20 mA maximum
Connection:
2.5mm power jack
Communications
Standard:
RS-232
Baud Rate:
Capable of monitoring up to 115.2K baud
Connections:
DB-25 female on the computer side
DB-25 male on the modem side
Lines Passed Through:
1-19 and 21-25
Line Controlled by 232ABRT:
20 (DTR)
Environment
Operating Temperature:
0 to 70C
Operating Humidity:
5 to 95% non-condensing
Storage Temperature:
-20 to 100C
Size
1.32"H x 2.40"W x 4.60"L
PDF 
ZIP