User's Manual

Title:
AJ102 Data Concentrator Unit User Manual
Ver.
1.4
Page:
13 of 23
5 Communication Interfaces
The DCU provides following communication interfaces:
Function
Interface
Baud Rate
Protocol
Local
Optical port
9,600 bps
DLMS/COSEM HDLC profile
RS-232
115,200 bps
WAN
3G
Downlink transfer: max. 85.6 kbps
Uplink transfer: 42.9 kbps
DLMS/COSEM TCP/IP Profile.
RJ-45 Ethernet
10/100M
DLMS/COSEM TCP/IP Profile.
LAN
RF
1,700 bps
DLMS/COSEM HDLC profile
RS-485
4,800 bps
DLMS/COSEM HDLC profile
5.1 Optical Port Communication
The optical port is used to read DCU and configure the DCU parameter or control the DCU locally. In
general, PC software is used to communicate with DCU via this optical port.
5.2 WAN Communication
The DCU has one replaceable 3G module as the main WAN communication interface, and has an Ethernet
communication interface as a backup WAN communication interface.
5.2.1 3G Communication
Remote communication uses 3G, and bases on DLMS/COSEM TCP/IP profile. The key features of 3G are
listed in below table:
General
Function
Performance &
Availability
Class 12 3G communication slot.
Support reconnection behavior after detecting an unexpected interrupted
communication session.
SIM
Support 2FF SIM card.
Support IMEI lock of the USIM card.
Indications of 3G
signal strength
Indicate 3G signal strength in a minimum of 3 separate levels. Refer to LED
indicators.
RSSI value is readable.
Antenna
Support both internal antenna and external antenna. Exchange the antenna
without de-energizing the device.
Access and
connection
Wake-up
Support fully qualified domain names.
Receive and store the IP addresses of the primary and secondary address
when establishing a PDP context based on the DHCP protocol
Support data pushing.
Authentication
and security
Changeable APN/password
Support RADIUS authentication using PAP or CHAP.
Network access information is not saved on the SIM cards
Communication settings to be remotely configurable
Assign IP
address
3G module support dynamic IP address assignment