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CHAPTER 4: COMMUNICATION INSTALLATION NETWORK OF INSTRUMENTS AND LONG DISTANCE COMMUNICATION
EPM 5300 SERIES ADVANCED POWER METERS – INSTRUCTION MANUAL 4–27
designed a Modem Manager RS-485 to RS-232C converter. This device automatically
programs the modem to the proper configuration. Also, if you have poor telephone lines,
modem manager acts as a line buffer, making the communication more reliable.
4.3.1 Modem Connected to Computer (Originate Modem)
Programming the Modem
Comply with the modem’s instruction manual and follow these instructions:
Restore modem to factory settings:
This procedure erases all previously programmed settings.
Set modem to display result codes:
The device uses the result codes.
Set modem to verbal result code:
The device uses the verbal codes.
Set modem to ignore DTR signal:
Necessary for the device to ensure connection with originate modem.
Set modem to disable flow control:
Necessary to communicate with remote modem connected to device.
Tell modem to write the new settings to activate profile:
Places these settings into nonvolatile memory; the settings take effect after the
modem powers up.
4.3.2 modem Connected to the Device (Remote Modem)
Programming the Modem
Comply with the modem’s instruction manual and follow these instructions:
Restore modem to factory settings:
This procedure erases all previously programmed settings.
Set modem to auto answer on N rings:
Sets the remote modem to answer the call after n rings.
Set modem to Auto Negotiate mode:
Sets the remote to auto negotiate to communicate successfully with EPM 5300P and
other devices in the modem.
Set modem to return numeric result codes:
Increases speed connection with EPM 5300P.
Set modem to ignore DTR signal:
Necessary for device to ensure connection with originate modem.
Set modem to disable flow control: