Multi-Tech Systems MT5600SMI-L32 manual AT-STE=3, No Dial Tone, AT+FCLASS=8, AT+VTX Dlep, AT+VLS=0

Local handset on-hook Ring

Starts to play greeting message User picks up extension

DTE send abort to end playback DTE hangs up.

Chapter 5 – AT Commands, S-Registers, and Result Codes

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 <DLE>R AT+VLS=1

OK AT+VSM=1,7200,0,0

AT+VTX

<DLE>P

<DLE>!

AT+VLS=0

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

Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 50