User's Manual

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AT+i Programmer‘s Manual Version 8.32 5-3
5.3 +iTUP Triggered Internet Session Initiation
Syntax:
AT+iTUP:<n>
Enter triggered Internet session initiation mode.
This command is relevant in a modem environment only.
Parameters:
n=0..2
Command Options:
n=0
Disable triggered Internet session initiation mode.
n=1
Enter triggered Internet session initiation mode. Upon receiving
a hardware signal trigger (Modem RING or MDSEL signal
pulled low), establish a PPP Internet connection and carry out
the IP registration process according to the relevant registration
option parameters.
If any characters are received on the host port prior to receiving
a hardware signal, iChip exits this mode and functions normally.
In this case, to reinstate this mode, issue AT+iTUP=1 again;
reset iChip by issuing the
AT+iDOWN command, or recycle
power.
n=2
Always Online mode. Whenever iChip is offline, it
automatically attempts to establish a PPP Internet connection
and possibly carry out the IP registration process according to
the relevant registration option parameters.
iChip disregards this mode and remains offline until the next SW
or HW reset if:
The MSEL (Mode Select) signal was pulled low (logical 0)
for more than 5 seconds during runtime.
-or-
The host issues the (+++) escape sequence.
Power must be recycled or the AT+iDOWN command issued for
this command to take effect.
If iChip is in Auto Baud Rate mode (
BDRF=a) and/or Auto Host
mode (HIF=0), iChip waits for the a character on the host serial
port to resolve the baud rate after rebooting and before activating
the iRouter and going online, or before activating the DHCP
server. Therefore, it is recommended to set a fixed host interface
and a fixed baud rate in this case.
Result Code:
I/OK
If n is within limits
I/ERROR
Otherwise