Mounting and Wiring
Remote Access
46 UMC800 Controller Installation and User Guide Release F
4/01
Modem configuration examples
Below are procedures for setting up the following commercially available modems:
• 3Com US Robotics 56K Data/Fax External Modem
• Zoom 56K Dualmode External Modem
• Best Data 56SX Data Fax External Modem
• SixNet VT-MODEM Industrial External Modem
3Com US Robotics 56K Data/Fax External Modem
Step Action
1
Ensure that the switches are set to the factory settings:
Switch Setting Position Function
1 OFF UP Normal DTR operations
2 OFF UP Verbal (word) results
3 ON DOWN Enable result codes
4 OFF UP Displays keyboard commands
5 ON DOWN Disables auto answer
6 OFF UP Modem sends CD signal when it connects with another
modem
7 OFF UP Loads Y0-Y4 configuration from user-defined
nonvolatile memory (NVRAM)
8 ON DOWN Enables recognition (smart mode)
2
Connect the modem to a PC. If your computer’s RS232 port has a 25-pin connector, use a
DB-25 male to DB-25 female RS232 cable. If your computer’s RS232 port has a 9-pin
connector, use a DB-25 male to DB-9 female modem cable.
3
Power-up the modem.
4
Run a serial communication port program such as Hyperterminal.
5
Within the communication program, select the port to which the modem is connected.
6
Configure the port to these settings:
baud rate = 9600
data bits = 8
parity = none
stop bits = 1
flow control = none
7
In the program’s terminal window, type in the letters “AT” followed by the enter key. The
modem should give an OK response.
8
Power down the modem and disconnect it from the PC.
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