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Software Manual 124

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indicator First, Mid and Last when dealing with the large TCP messages and possibility of TXP/IP packet fragmenta-

tion.

Allow peer to re-attache while connected: Select whether or not to allow TCP peer to re-attache to our server while

the socket is connected. If enabled, a new connection attempt from the same peer will be accepted, and the previ-

ous TCP connection will be closed. This can be useful to re-establish a connection if the link is not closed gracefully.

Listening IP Address (Required): Enter the listening IP Address into this field. This is required if the device is acting as

a TCP/IP Server. If set to 0.0.0.0 any remote client can connect to our listening port, and if set to a specific IP, only cli-

ent with configured IP can connect to our listening port.

Listening IP Port (Required): Enter the listening Port number into this field. This is required if the device is acting as

a TCP/IP Server.

TCP Client/Server 2 Way: If this option is selected, the device will listen on configured Listening IP Port for client connection

to communicate with serial device and once the client is disconnected, and the serial device connected to the ttyS1 port

needs to report it’s status, the device will connect to the host destination to report the device’s status.

Enable IP Destination Config File: Enabling this option allows the user to configure the host destination IP/Port address

via the IP Destination option in the Advanced menu. The recommended setting for this field is YES, if configuring the IP

destination via Advanced → GWLNX → IP Desnaon.

TCP Headers: Select the TCP/IP Header Type (Message Length Field) required for TCP/IP communication from the drop-

down list. The available options for this field as shown below.

None: If this option is selected, the device will not add or remove any bytes as the length field from the data packets

received or transmitted.

Standard: If this option is selected, the device will add 2 bytes of binary exclusive network order to all transmitted

TCP packets, and will remove the 2 bytes from the received TCP packets.

Extended: If this option is selected, the device will add 4 bytes of binary exclusive network order to all transmitted

TCP packets, and will remove the 4 bytes from the received TCP packets. Extended header normally is used as an

indicator First, Mid and Last when dealing with the large TCP messages and possibility of TXP/IP packet fragmenta-

tion.

Host IP Address (Required): Enter the host destination IP Address into this field. This is required if the device is acting as

a TCP/IP Client.

Host IP Port (Required): Enter the host destination Port Address in this field. This field is required if the device is acting as

a TCP/IP Client.

Client Source Port: Enter the Source Port Address into this field This is required if the device is acting as a TCP/IP client

and using specific source port for TCP socket connection.

Allow peer to re-attache while connected: Select whether or not to allow TCP peer to re-attache to our server while the

socket is connected. If enabled, a new connection attempt from the same peer will be accepted, and the previous TCP

connection will be closed. This can be useful to re-establish a connection if the link is not closed gracefully.

Listening IP Address (Required): Enter the listening IP Address into this field. This is required if the device is acting as a

TCP/IP Server. If set to 0.0.0.0 any remote client can connect to our listening port, and if set to a specific IP, only client

with configured IP can connect to our listening port.

Listening IP Port (Required): Enter the listening Port number into this field. This is required if the device is acting as a

TCP/IP Server.

UDP BroadCaster: If this option is selected, the device will support 5 UDP broadcast addresses.

Peer IP Address (Required): Enter the peer IP Address into this field. This is required for UDP communication. This speci-

fies the Peer IP address and if set to 0.0.0.0 any remote IP can send UDP packets to our peer port, and return packets will

be sent back to the IP of the last host that sent a message. Packets cannot be sent until one is received first (to learn the

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