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)