4
Table 1
(3 of 8)
New Features and Changes
Feature or
Configuration
Option
Notes
&S6:
DSR Control
Dial Backup Toggle
3810: pp. 4-15, 5-15
3830: p. 3-13
Data Set Ready (DSR) Control is among the DTE
Interface Configuration Options, and determines the
usage and meaning of the DSR signal. The
&S6 command (DialBkToggle) is new.
&S0
Forced On. The DSR signal is always on.
&S1
Standard RS232. The modem controls DSR,
turning it on during the handshaking process,
and off upon disconnect.
&S2
Wink When Disconnect. DSR is normally
forced on, and is turned off for 1–2 seconds
upon disconnect.
&S3
Follows DTR. When the modem receives
Data Terminal Ready (DTR), it returns DSR.
&S4
On Early. DSR is off when the modem is idle.
It is turned on when a command is issued to
enter Data mode.
&S5
Delay to DTE. Like the Standard RS232
option, except that DSR is not turned on until
the modem enters Data mode.
&S6
Dial Backup Toggle. DSR is turned off during
a dial backup attempt in Leased mode, and
on when such an attempt completes. DSR is
also turned off when a disconnect begins, and
on when the disconnect is complete.
