10–2 EPM 9450/9650 ADVANCED POWER QUALITY METERING SYSTEM – INSTRUCTION MANUAL
HARDWARE CONNECTION CHAPTER 10: METER WITH INTERNAL MODEM OPTION (COMM OPTION 2)
10.2 Hardware Connection
Use RJ11 Standard Telephone Line to connect with the EPM 9450/9650 meter. Insert the
RJ11 line into the RJ11 Port on the face of an EPM 9450/9650 meter with the Internal
Modem Option. The RJ11 connection is virtually unlimited, since it utilizes a PSTN (Public
Switched Telephone Network).
10.3 Dial-In Function
The modem continuously monitors the telephone line to detect an incoming call. When an
incoming call is detected, the modem waits a pre-programmed number of rings and then
answers the call. The modem can be programmed to check passwords and lock-out a user
after unsuccessful attempts to connect.
When an incoming call is successfully connected, the control of communication passes to
the calling software program. The modem respond to computer demands to download
data or perform other actions authorized by the meter's passwords.
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