Integrator’s Reference Manual
6-40 80-99208-1 Rev. D
Online-Command Mode Commands
Online-Command mode allows the Online m ode 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-Comma nd
mode.
When the Control port is active, the +++ escape sequence and
the O command return their normal success stat us, 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 m ode. 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 nece ssary 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 Va lue( s)
N/A.