Comtrol AT Command Set Rev A - Manual (Page 74)

AT Commands Reference Manual
Conexant 100722B
3-48
The line is not in use and the modem tries to dial
AT-STE=7
ATDT555-1212
Modem goes off-hook
CONNECT
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 an extension goes off-hook
AT-STE=2
ATDT555-1212
CONNECT
NO CARRIER Extension is picked up, GSTN
Cleardown sent
ATS86=?
025
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