4-26
Issue 3 April 1994
Table 4-1. AT Command and S-Register Reference (25 of 27)
AT
Command
or
S-Register
Description
S78=
n
V.32 bis Automode for Dial-Line Operation
If enabled, automode permits the modem to
automatically connect to a remote modem using any
supported modulation scheme. If disabled, the modem
only supports the modulation scheme selected by the
S41 register (Dial-Line Rate).
0 = Enable
1 = Disable
S79=
n
V.17 Fax Disable
This register allows you to enable or disable V.17 fax
(14,400 bps) functionality in your modem. This is
necessary if your PC fax application does not correctly
support V.17 operation.
0 = Enable
1 = Disable
S84=
n
AT Command Mode
This register determines how the modem responds to
valid and invalid AT commands.
0 = Normal
1 = No_Error
2 = No_Strap_or_Error
CAUTION: If the modem is set for No_Strap_or_Error,
you must use the S84 register (ATS84=0) in order to
restore the modem to normal operation.