Hongdian H7921/H7920 Basic 3G/4G Router - Manual (Page 63)

H92x 3G/4G Router 7 FAQ
Version (2014-05-28) 7 -29
Step 5 Configure “DTU” parameter.
Table 5-15 DTU Parameter instruction
Parameter Details Operation
DTU Service Enable or Disable DTU Service DTU Service options
 Enable

Disable
Basic Settings
Work Mode Work mode:

Server: 3G/4G router act as
TCP/UDP server
 Client: 3G/4G router act as
TCP/UDP client
 DDPClient: 3G/4G router act
as UDP client with Hongdian
protocol
Select from Dropdown List

Server
 Client
 DDPClient
Local Port DTU service port Specify the port number:1-65535
Protocol Protocol of TCP/UDP
connection
TCP protocol is a
connection-oriented reliable
transport protocol for high
reliability requirements and for
communication efficiency
which is not
high degree of sensitivity of the
occasion
UDP protocol is a
connectionless unreliable
transport protocol, suitable for
relatively high efficiency
requirements, and the occasion
Select protocol:TCP or UDP
Note:
When the work mode is "DDP
clients," only support "UDP
protocols used in conjunction with
the DDP protocol.”