Baud Rate For Rs-232 Communication; Hooking Up An External Modem; Figure 9: Hooking Up An External Modem - Chamberlain SENTEX Infinity Series Installation Instructions Manual

D. BAUD RATE FOR RS-232 COMMUNICATION
The Infinity can receive and transmit data via an RS-232 serial port at one of four baud rates (300,
1200, 2400, and 4800). The factory setting is 4800 baud.
Change the baud rate by moving the jumper on the RS-232 BAUD SEL shorting block (Fig. 3/4).
NOTE: • Make sure the baud rate is the same on all Multi-Link units in the chain.
• • • •
Make sure the baud rate is the same for any external device you connect, such as a
printer or terminal
E. HOOKING UP AN EXTERNAL MODEM
The Infinity can communicate with a remote terminal via RS-232 serial port 1 and modems.
SOURCE
Jumper:
Pins 4 to 5
Pins 6 to 20
DB25
1565F1
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EXTERNAL MODEM
POWER
POWER
7
DB25 PIN #
3-Conductor, Shielded Cable

Figure 9: Hooking Up an External Modem

RS232
PHONE
CONNECTION
Jumper
CTS to RTS
Use 18-24 AWG,
(50 Feet Max. Length)
INFINITY
PROCESSOR
BOARD
Doc 6001565
PHONE LINE
TELCO
CONNECTION
TB2
CTS
OUT
GND
IN
RTS
Rev C