Multi-Tech Systems MVP210-SS - Manual (Page 154)

Technical Configuration MultiVOIP User Guide
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The Regional Parameters screen will appear. For the country selected,
the standard set of frequency pairs will be listed for dial tone, busy
tone, ‘unobtainable’ tone (fast busy or trunk busy), ring tone, and
other, more specialized tones.
Remote Configuration/Command Modem. Each MVP410 and MVP810
MultiVOIP unit contains a built-in modem. This modem allows the
MultiVOIP to be configured remotely when a standard POTS line is
connected to the “Command Modem” connector on the back panel of
the MultiVOIP. In the Country Selection for Built-In Modem field
(drop-down list), select the country that best fits your situation. This
may not be the same as your selection for the Country/Region field.
The selections in the Country Selection for Built-In Modem field
entail more detailed groupings of telephony parameters than do the
Country/Region values.
In each field, enter the values that fit your particular system.