Boca Systems M144PA, Руководство пользователя

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14.4 BOCAMODEMcard-PC
40
&Cn Data Carrier Detect (DCD) Option: (1)
This command controls how the modem functions in relation to the DCD
or RLSD Signal.
n = 0 State of carrier from remote modem is ignored. DCD is always
on.
n = 1 State of carrier from remote modem is tracked. DCD
reflects the state of the received carrier.*
&Dn Data Terminal Ready (DTR) Option: (2)
This command controls how the modem responds to DTR.
n = 0 In Asynchronous Mode (&Q0), the modem ignoresDTR.
n = 1 The modem switches from Data Mode to Command Mode
when an on-to-off transition of DTR occurs.
n = 2 An on-to-off transition of DTR causes the modem to go on-
hook (hang-up) and disable Auto-answer Mode. Auto-
answer Mode (S0 is not equal to zero) is enabled when
DTR is turned on.*
n = 3 An on-to-off transition of DTR reinitializes the modem. The
reinitialize procedure is identical to the ‘Zn’ reset procedure.
&F Load Factory Defaults: (none)
This command loads command and S-Register factory defaults into the
active configuration.
&Gn Guard Tone Option: (0)
This command controls whether the modem will send out guard tones
while connected to a remote modem. Guard. tones may be required in
some countries but are not needed in the United States. Guard Tones are
sent by the answer modem to disable Central Office echo cancelers.
n = 0 Guard tone disabled.*
n = 1 550-Hz guard tone enabled.
n = 2 1800-Hz guard tone enabled.