3.0 Modem Setup Options

The V.25 bis Dialer Modes are available for V.25 bis mode.

Any of the selections from the DIAL V25bis screen will enable the V.25 bis autodialer. For detailed information on the V.25 bis autodialer, see Chapter 6.

The three selections on the DIAL V25bis screen allow you to select a data protocol that is appropriate for the DTE the Modem is connected to:

ASYNCHRONOUS (Asyn)

SYNCHRONOUS, CHARACTER ORIENTED (Syn_c)

SYNCHRONOUS, BIT ORIENTED (Syn_b)

NOTE

DTR dialing for V.25 bis mode cannot be enabled through the DIALER screen. To select DTR dialing for V.25 bis mode, you must use the Summary Setup feature, as explained in Chapter 6.

The Auto-Answeroption is available for Hayes, V.25 bis, and Dumb modes. It determines whether or not a call is automatically answered when the phone rings. Setting the Auto-Answer option to ENABLE resets Hayes mode register S0 to 1 (meaning that calls are answered on the first ring).

3.3.3DATA FORMAT OPTIONS

The Data Format (Sync or Async) option is available for V.25 bis, Dumb, and Leased-Line modes. The data format setting for the local modem and for the remote modem must be the same.

ASYNCHRONOUS — Data is transmitted and received in the character asynchronous format. The character length (next option) must be the same for both communicating modems.

SYNCHRONOUS — If this option is selected, data must be transmitted and received in the synchronous format. The appropriate transmitter clocking option must be selected. The synchronous data format is not available for data rates of 300, 19,200, or 38,400 bps.

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Black Box MD885A-R3, MD885AE-R2, MD885C-R2, 34336 user manual Data Format Options

MD885C-R2, MD885A-R3, MD885AE-R2, 34336 specifications

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