Multi-Tech Systems 7500 - Manual (Page 289)

ION 7500 / ION 7600 User’s Guide Changing the Internal Modem Settings
Modem AT Commands Technical Note Page 289
Changing the Internal Modem Settings
To reconfigure the ION meter’s internal modem, access its setup register:
Using PEGASYS™ or ION Enterprise™:
In Designer, right-click the internal modem’s Comm module (inside the
Communications Setup group).
Using ION Setup™:
Double-click the Comm module icon for the meter’s internal modem. If you
cannot see the module, right-click the meter icon. In the Device Properties
dialog box, click the Tools tab, then select “Show Advanced ION Setup” in the
Device Setup box. Click OK.
Changing the Local Modem Settings
Using PEGASYS or ION Setup
PEGASYS and ION Setup use the modem.ini file to define how the local modem
should behave whenever modem communication is initiated. The modem.ini file
contains information that sets the local modem to the specified baud rate and turns
compression and error correction off. This particular setting is useful only if there
are 3700 Series meters connected to the ION meter’s internal modem
communications loop (through ModemGate
TM ). If only ION meters are used, we
recommend that only the minimum required modem.ini settings be used (i.e. Q0
E0 V1 &K0).
Use a standard text editing software like Notepad™ to make changes to the
modem.ini file.
Using ION Enterprise
ION Enterprise™ uses database queries to configure the local modem settings.
Database queries are beyond the scope of this technical note. If you want to learn
how to configure the local modem using ION Enterprise, please contact Power
Measurement Technical Services.
Cellular Phone Compatibility
Using analog cellular phones to communicate with a meter equipped with a modem
is not recommended due to the inherent unreliability of cellular phone
communication. However, if cellular phone-to-meter communication is necessary,
we recommend the following setup:
For compatibility with the (newer) Multi-Tech internal modem:
Local modem: Multi-Tech 5600ZDX or GVC 56K (also possible with other
Conexant chipset based modems)
Necessary AT commands: +MS=11,1,1200,4800\N2