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6.9
Functional description
6.9.1
Password/Dialback Mode 1 - Protected System
AT+PO0p|
Set the modem to demand a password when someone calls
A AT+PO1 gl
Modem answers OK:
Command is accepted.
If modem
answers ERROR:
It is not possible to use this
command if synchronous mode (&M command ) or direct mode
(\N1 command ) is selected. Set asynchronous mode (&MO) and
turn off direct mode ( i.e. \NO,\N2 or \N3).
when this configuration is set it can only be reset by the
+PO0 command.
The &F or Z commands will not reset it.
To activate the auto answer push the Auto-switch.
In normat mode (password OFF), the SO register decides
whether the auto answer function is active or not. If password
function is active, the SO register changes and you must push
the MAN/AUTO switch to auto answer. The SO value is only
used simulating a step 3 call.
The modem
has now changed its
operating mode for how to handle incoming calls. The procedure
is divided into three main steps:
Step 1:
The purpose of this is that a connected system shall not be
disturbed by any caller until the modem has made a proper
connection.
The DTE is not supposed to know the background activity.
The modem will answer incoming calls ONLY if the MAN/AUTO
switch is activated.
This call is "silent", i.e. R125, CD/109, DSR/107, and the
resultcodes RING- and CONNECT will not be given
It is not possible to terminate an answer handshake by sending
data to the modem.
As soon as a connection is made (successful handshake), the
6-1
0
LZTR104006 R1.00
Zat 14.4/14.4-7 and 19.2/19.2-7
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