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NPort IA5150/5250 Series User’s Manual Web Console Configuration
5-28
Ethernet Modem
Setting Value Notes Necessity
TCP port valid port No.
The TCP port that other devices must use to
contact this device. To avoid conflicts with
standard TCP ports, the default is set to 4001.
Required
0
TCP connection is not closed due to an idle serial
line.
TCP alive
check time
1 to 99 min.
TCP connection is automatically closed by this
device if there is no TCP activity for the given
time.
Optional
AT Commands
NPort IA5150/5250 supports the following common AT commands used with a typical modem:
No. AT command Description Remarks
1 ATA Answer manually
2 ATD <IP>:<Port> Dial up the IP address : Port No.
3 ATE ATE0=Echo OFF
ATE1=Echo ON (default)
4 ATH ATH0=On-hook (default)
ATH1=Off-hook
5 ATI, ATI0, ATI1, ATI2 Modem version reply “OK” only
6 ATL Speaker volume option reply “OK” only
7 ATM Speaker control option reply “OK” only
8 ATO On line command
9 ATP, ATT Set Pulse/Tone Dialing mode reply “OK” only
10 ATQ0, ATQ1 Quiet command (default=ATQ0)
11 ATSr=n Change the contents of S register See “S registers”
12 ATSr? Read the contents of S register See “S registers”
13 ATV Result code type
ATV0 for digit code,
ATV1 for text code
0=OK
1=connect (default)
2=ring
3=No carrier
4=error
14 ATZ Reset (disconnect, enter command
mode and restore the flash settings)
15 AT&C
Serial port DCD control
AT&C0=DCD always on
AT&C1=DTE detects connection by
DCD on/off (default)