Multitech MT2834MR Owner's Manual page 31

PN 88300150
the Extended set provides several responses (CONNECT, CONNECT 1200, CONNECT
2400 and CONNECT 9600).
Regarding the method of dialing, the MT2834MR can detect standard dial tones and busy
signals. This capability ("smart dialing") allows the modem to wait for a dial tone, and when
one is detected, to begin dialing immediately.
The MT2834MR also can detect a distant busy signal if after dialing, it reaches a busy
number. This is useful because it allows the modem to immediately abandon a call, rather
than wait 45 seconds for a carrier signal that will never come.
The MT2834MR gives you a choice between the wait-for-dial-tone ("smart") dialing method
we just described, and blind ("dumb") dialing, where instead of detecting actual dial tones, the
modem relies on timed pauses. When the wait-for-dial-tone method is chosen, the busy
signal detection capability is also activated. The X command is also used to select which
dialing method is used.
Five different X commands are available (X0 through X4), with five different effects on the
MT2834MR's result code set.
X0 Provides the basic (short) result codes and provides "dumb dial" capabilities.
X1 Provides the extended result codes and provides "dumb dial" capabilities.
The remaining X commands select "smart" dialing methods and turn on extended result
codes.
X2 Looks for dial tone only and will not provide a busy response.
X3 Looks for busy only and not for dial tone.
X4 Looks for dial tone and for busy.
The factory default setting is X4, which selects extended and "smart" result codes.
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