BGS2T AT Command Set
7.18 +++
BGS2T_ATC_V01.301
Page 157 of 554
1/31/12
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7.18
+++ Escape from Data Mode to AT Command Mode
+++ esacape sequence is only available during a CSD call or a GPRS connection. The +++ character sequence
causes the BGS2T to pause data mode and return to AT command mode. This allows to enter AT commands
while maintaining the data connection to the remote device or, accordingly, the GPRS connection. By the way
the same task can be performed by toggling the DTR line if
is set to 1.
is used to resume data or PPP
online mode.
To prevent the +++ character sequence from being misinterpreted as data, it must be preceded and followed by
a pause of at least 1000 ms. The +++ characters must be entered in quick succession, all within 1000 ms.
Syntax
Notes
•
In Multiplex mode the +++ sequence does not work. Therefore, if required in Multiplex mode, the escape
sequence needs to be implemented in the Customer Application. Design solutions, for example using the
DTR signal or a modem status command (MSC), can be found in
, Section "Escape Sequence". Also refer
•
Sending
(or toggling DTR) while data flow has stopped because of flow control may cause the AT com-
mand interpreter to handle unprocessed buffered data as AT command input. As a result, some of the buff-
ered data might be executed as unwanted AT commands after the ME has returned to command mode.
Therefore,
should be avoided when data flow has stopped because of flow control.
•
When using XON/XOFF flow control (
1) in online mode,
should not be used while the data trans-
mission is paused with XOFF. Before entering the command mode with
the paused transmission should
be resumed using the XON character.
Exec Command
+++
Response(s)
OK
PIN ASC0 MUX1 MUX2 MUX3
Last
Reference(s)
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V.250
Confidential / Released