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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-Answer option 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).
3.3.3 D
ATA
F
ORMAT
O
PTIONS
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.