Multi-Tech Systems MT5600SMI-34 - Manual (Page 50)

Chapter 5 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 50
An extension is off-hook but there is silence on the line and the modem
tries to dial
AT-STE=3
ATDT555-1212
Modem goes off-hook
NO DIAL TONE
Modem is connected in data mode and remote modem goes on-hook
AT-STE=4
ATDT555-1212
CONNECT
NO CARRIER
Remote modem drops line
ATS86=?
025
Modem is in answer machine mode and an extension goes off-hook
AT-STE=2
AT+FCLASS=8
OK
<DLE>h Local
handset on-hook
<DLE>R Ring
AT+VLS=1
OK
AT+VSM=1,7200,0,0
AT+VTX
Starts to play greeting message
<DLE>P User picks up extension
<DLE>! DTE send abort to end playback
AT+VLS=0 DTE hangs up.
Automated system that needs to periodically use the line while giving the
voice user the highest priority
A common use for these features would be an automated system that
needs to periodically use the line while giving the voice user the highest
priority. The automated system would make a connection when the line is
free. It would do this without disturbing the line if the line is in use. The
automated system would periodically retry the connection until the line is
free. Once the line is free it would dial and make its connection. If a voice
user wishes to use the line while the modem is connected. The modem will
drop the line and give the line to the user. The modem will then try to
regain control of the line by once again periodically retrying to establish a
connection.
AT-STE=7
OK
ATDT5551212
CONNECT
Sometime later, the user picks up phone
NO CARRIER
ATS86?
25
OK
Delay 30 seconds
ATDT5551212
LINE-IN-USE
Try again some time later; user hangs up phone
CONNECT