General Features
Features Guide 33
• The connection chart for the external modem (25-pin) is as follows:
• An AT Command (for initialization, enabling Automatic Answer, etc.) can only be
programmed by Serial Interface / remote programming software.
"AT&F0Q0E0V1S0=1X0&D0" is stored as the default value.
• For more information about the AT Command, please refer to the modem instructions.
Programming Guide References
• 2.3 Numbering Plan
– MODEM Control
• 10.2 External Modem 1/2
– Manual Initialization Command (1- 5)
– Automatic Initialization Command
• 10.3 External Modem 2/2
– Connection Message (1-5)
– Disconnection Message (1-5)
• 10.6 System Parameters
Features Guide References
1.2 System Administration
• System Programming and Diagnosis with Personal Computer
User Manual References
• 4.3.36 External Modem Control
Pin
No.
Serial Interface (RS-232C)
port on the main unit
Signal
Name
Pin
No.
Signal
Name
2
3
6
20
2
3
6
20
SD (TXD)
RD (RXD)
DSR
ER (DTR)
Serial Interface (RS-232C)
port on the modem
RD (RXD)
SD (TXD)
DSR
ER (DTR)
