Page 45 of 62
Incoming Friendly IP Address:
This specifies a remote IP address that is allowed to access the modem. A wildcard IP address of
0.0.0.0 allows all remote IP address to access the modem.
Incoming Port:
Sets the port number used to forward incoming traffic to the serial port. Inbound traffic with this
port will be forwarded to the serial port in client mode.
Outgoing Port:
Sets the port number used to send outbound traffic from the serial port. These will be packetized
and sent to an external IP address and the port number specified.
PAD Mode:
Select buttons to set the PAD mode of the modem as a Server or Client.
Server mode waits for inbound TCP connections from remote client or UDP data being sent to the
external modem’s IP address. For example, server mode can be used for mobile termination calls.
When in server mode, it is possible for the connected serial device to make an outbound TCP or UDP
connection when an AT Command is issued (remote IP address: port number, e.g.
ATD*166.23.42.10:5000).
Client mode keeps an always-on TCP connection to a remote server or sends all UDP to the IP
address and port number specified. For example, client mode can be used for mobile origination
calls.
Pad Protocol:
Sets the data protocol of the PAD to TCP or UDP data. If you have set PAD Mode as server you
can choose either to support either type of data packets.
TCP Client Keep Alive:
When in client mode and enabled, TCP Keep Alive packets will be sent from the client to the server
periodically in order to detect a broken connection. The modem will automatically try to re-establish
the connection if necessary. Changing this setting will affect the use of TCP Keep Alive on the next
client session. It will not affect an existing session.
TCP Client Keep Alive Time:
Time in seconds between keep alive cycles. A keep alive cycle will consist of one or more keep alive
probes separated by the keep alive interval. If a keep alive time has no response the unit will send
probes.
TCP Client Keep Alive Probes:
Number of keep alive packets that must fail before connection is considered closed.
TCP Client Keep Alive Intvl:
Time in seconds after which a keep alive packet is considered to be failed (if not acknowledged).
Another packet is sent at this time if TCP Client Keep Alive Probes limit has not been reached.
Server Session Closed On:
This is only available if PAD mode is Server. This option selects under which conditions the server
will terminate an established connection. (If the termination of the TCP current connection was not
received properly by the modem then the connection will hang until the modem reboots or one of
the two below methods is invoked.)
New Client: If a different client attempts to connect, it will be successful and the current client
will be forcibly disconnected, without any warning.
