Transparent: Router will transmit the serial data transparently 
without any protocols. 
Modbus: Router will transmit the serial data with Modbus 
protocol. 
Select from “TCP Server”, “TCP Client” and “UDP”. 
Enter the Local port for TCP or UDP. 
Multiple Server 
@Transparent 
Click “Add” button to add multiple server. You need to enter 
the server’s IP and port, and enable or disable “Send data to 
serial”. If you disable “Send data to serial”, router will not 
transmit the data from this server to serial port. 
Note: This section will not be displayed if you select “TCP server” 
in “Mode”. 
Enable 
Protocol @Transp
arent 
Tick to enable protocol advanced setting. 
Interval Timeout 
@Transparent 
The serial port will queue the data in the buffer and send the 
data to the Cellular WAN/Ethernet WAN when it reaches the 
Interval Timeout in the field.   
Note: Data will also be sent as specified by the packet length 
or delimiter settings even when data is not reaching the 
interval timeout in the field. 
Packet Length 
@Transparent 
The Packet length setting refers to the maximum amount of 
data that is allowed to accumulate in the serial port buffer 
before sending. 0 for packet length, no maximum amount is 
specified and data in the buffer will be sent as specified by the 
interval timeout or delimiter settings or when the buffer is full. 
When a packet length between 1 and 1024 bytes is specified, 
data in the buffer will be sent as soon it reaches the specified 
length.   
Note: Data will also be sent as specified by the interval timeout 
or delimiter settings even when data is not reaching the preset 
packet length. 
When Delimiter 1 is enabled, the serial port will queue the data 
in the buffer and send the data to the Cellular WAN/Ethernet 
WAN when a specific character, entered in hex format, is 
received. A second delimiter character may be enabled and 
specified in the Delimiter 2 field, so that both characters act as 
the delimiter to control when data should be sent.   
Delimiter1 (Hex) @ 
Transparent 
Enter the delimiter in Hex. 
Delimiter Process 
@ Transparent 
The Delimiter process field determines how the data is handled 
when a delimiter is received.   
None: Data in the buffer will be transmitted when the delimiter 
is received; the data also includes the delimiter characters.