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NPort 5110 Series User’s Manual Web Console Configuration
5-23
Disconnection request from remote site
After the TCP connection has been shut down by the remote Ethernet modem or PC, NPort 5110
will send the “NO CARRIER” signal via the serial port and then return to command mode.
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 – 99
min.
TCP connection is automatically
closed by this device if there is no
TCP activity for the given time.
Optional
AT Commands
NPort 5110 supports the following common AT commands used with a typical modem:
N
o. 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)