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Integrator’s Reference Manual
6-40 80-99208-1 Rev. D
Online-Command Mode Commands
Online-Command mode allows the Online mode data stream
to be interrupted so that AT commands are recognized and
processed. An escape sequence, injected into the data stream,
directs the modem to enter Online-Command mode from
Online mode.
All AT commands recognized in Command mode are also
recognized in Online-Command mode. The
H command and
the
O command are of particular use in Online-Command
mode.
When the Control port is active, the
+++ escape sequence and
the
O command return their normal success status, even
though the Control port’s operating mode has not changed
from Command mode.
Change from Online to Online-Command Mode (+++)
Syntax
~+++~
Description
The escape sequence that directs the modem to change from
Online to Online-Command mode. Although this is not an AT
command, it is necessary to support Online-Command mode
and is, therefore, listed here for easy reference.
The
~ character indicates the “guard-time” both before and
after the escape sequence. This “guard-time” is necessary to
differentiate between the escape sequence
+++ and any other
string of three
+ characters inside the Online data stream.
EIA/TIA/IS-707A defines the length of the “guard-time” as
“an appropriate time.” The modem defines the “guard-time”
to be 1 second.
Note
The “+++” string is transmitted through to the host side, even if the
escape sequence is recognized.
Valid Value(s)
N/A.