Kentrox DataSMART T3/E3 IDSU Installation Manual page 32

32 Chapter 4: Cabling interfaces and ports
Connecting control ports to a modem
Connect a modem to the DTE port after configuring the modem with the AT commands in
the list below. It is essential to configure the modem before connecting it to the DTE port
because many modems cannot be configured afterwards. This configuration sets auto-
answering, flow control, and some other parameters essential to
successful communication.
Use only a modem that is compatible with the following AT commands.
Table 1—Standard AT command set
AT
Action
command
ATS0=1 Auto answer on first ring
AT&C1 DCD is asserted by modem when connection is made
AT&D1 Enter command mode if DTR goes low
Enter the following commands carefully. The characters entered will
not be echoed and there will be no responses.
ATQ1 Modem does not return codes
ATE0 Modem does not echo command characters
AT&W0 Store current configuration as user profile 0
AT&Y0 Specify user profile 0 as power-up configuration
Modem
response
OK
OK
OK
No response
No response
No response
No response