Case 6944 User manual

Revision V2.6
Case Communications
6944 Industrial Router
Manual

Introduction Page 1 Rev 2.6
This page left blank intentionally

Introduction Page 2 Rev 2.6
REVISION HISTORY
Trademarks and copyright
Case Communications Ltd and logo are the trademarks or registered trademarks in the United Kingdom.
All other trademarks mentioned in this document are the property of their respective owners.
@2019 Case Communications Ltd. All Rights Reserved.
Disclaimers
Information in this document is subject to change without notice and does not represent a commitment on
the part of Case Communications.
Case Communications provides this document as is, without warranty of any kind, either expressed or
implied, including, but not limited to, its particular purpose. Case Communications may make
improvements and/or changes in this manual, or in the product(s) and/or the program(s) described in this
manual at any time.
Information provided in this manual is intended to be accurate and reliable. However, Case
Communications assumes no responsibility for its use, or for any infringements on the rights of third
parties that may result from its use.
Technical Support
E-mail: [e-mail]
Web: www.casecomms.com
Manual
Revision
Date
Firmware Version
Revision Details
V1.0.0.
May 2018
Initial release.
V1.1.0
Aug 2018
Add Schedule Reboot, OpenVPN, IPSec
V1.1.1
Oct 2018
Add SSH, GRE, VRRP, Wi-Fi Client
V1.2.0
Jun 2019
v1.1.0(278c6c6)
Add Data Roaming, IP Passthrough, SMS, GRE
Layer2. AT Debug, APP structure
V.1.2.1
Jun 2019
v1.1.0 (ddcaac4)
Add SMS Gateway, SMS Notification
V.1.2.2
Sept 2019
V1.1.0 (addcaac4)
Added MODBUS Slave feature –Appendix 9
V.2.3
Sept 2019
V1.1.0 (addcaac4)
Added SMS Reboot missing from manual
V2.4
Feb 2020
V1.1.0 (addcaac4)
Added MODBUS Master Appendix F
V2.5
June 2020
V1.1.3(e335ec6)
Added Dynamic Routing and SNMP
V2.6
Sept 2020
V1.1.3(e335ec6)
Added section on testing Open VPN from PC

Introduction Page 3 Rev 2.6
Interference Issues
Avoid possible radio frequency (RF) interference by following these guidelines:
•The use of cellular telephones or devices in aircraft is illegal. Use in aircraft may endanger operation
and disrupt the cellular network. Failure to observe this restriction may result in suspension or denial of
cellular services to the offender, legal action, or both.
•Do not operate in the vicinity of gasoline or diesel fuel pumps unless use has been approved or
authorized.
•Do not operate in locations where medical equipment that the device could interfere with may be in
use.
•Do not operate in fuel depots, chemical plants, or blasting areas unless use has been approved and
authorized.
•Use care if operating in the vicinity of protected personal medical devices, i.e., hearing aids and
pacemakers.
•Operation in the presence of other electronic equipment may cause interference if equipment is
incorrectly protected. Follow recommendations for installation from equipment manufacturers.
Declaration of Conformity
The 6944 Series products are in conformity with the essential requirements and other relevant provisions of
the CE and RoHS.

Introduction Page 4 Rev 2.6
TABLE OF CONTENTS
1PRODUCT OVERVIEW………………………………………………………………… 1
1.1. Overview 1
1.2. Features and Benefits 1
1.3. General Specifications 2
1.4. Mechanical Specifications 4
1.5. Package Checklist 4
2INSTALLATION…………………………………………………………………………..6
2.1. Product Overview 6
2.2. LED Indicators 7
2.3. Ethernet Port Indicator 7
2.4. PIN Definition of Terminal blocks 7
2.5. Reset Button 8
2.6. Insert SIM card 8
2.7. Install Antenna 9
2.8. DIN-Rail Mounting 10
2.9. Protective Grounding Installation 10
2.10. Power Supply Installation 11
2.11. Powering On The 6944 Router 11
3ACCESSING THE WEB CONFIGURATION PAGE…………………………………. 12
3.1. PC Configuration 12
3.2. Factory Default Settings 13
3.3. Logging in to the 6944 Web Page 14
4BROWSER CONFIGURATION…………………………………………………………15
4.1. Web Interface Overview 15
4.1.1. Status 16
4.1.2. Syslog 17
4.2. Link Management 18
4.3. Connection Manager 18
4.3.1. Cellular 20
4.3.2. Ethernet 22
4.3.3. Wi-Fi 28
4.3.4. Wi-Fi AP 29
4.3.5. Wi-Fi Client 30
4.4. Industrial Interface 32
4.4.1. Serial 32
4.4.2. Digital IO 34
4.5. Network Configuration 37
4.5.1. Firewall and ACL 37
4.6. Routing 40
4.7. V.R.R.P 47
4.8. IP Passthrough 48

Introduction Page 5 Rev 2.6
4.9. VPN (Virtual Private Networks) 49
4.9.1. OpenVPN 49
4.9.2. Testing OpenVPN between a PC and the 6944 53
4.9.3. IPSec 56
4.9.4. GRE 59
4.10.1. CLI reference commands 60
4.10.2. How to Configure the CLI 61
4.11. SNMP 62
4.11.1. Overview 62
4.11.2. Topology 62
4.11.3. Configuring the 6944 Router 62
4.11.4. Testing 64
4.11.5. Controlling the 6944 Router 64
4.11.6. Receiving SNMP Traps 66
5Digital I / O Ports………………………………………………………………………………. 68
5.1. Digital Input 68
5.2 Digital Output……………………………………………………………………… 68
6MODBUS Slave…………………………………………………………………………………. 69
6.1 Overview 69
6.2 Topology 69
6.3 Digital Input - Output Register Table 70
6.4 Configuration 71
6.5 Testing 71
7MODBUS Master.......................................................................................................................... 73
7.1. Introduction 73
7.2. Topology 73
7.3. Transport via TCP 74
7.3.1. Configuration on Modbus Slave 74
7.3.2. Configuration of the Modbus Poll 74
7.4. Configuring Modbus Transport 75
7.5. Transport via FTP 77
7.6. Transport via MQTT 79
8. MAINTENANCE…………………………………………………………………….......... 82
8.1. Upgrading Software 82
8.2. System Settings 83
8.3. Configuration 86
8.4. Debug Tools 88
Appendix A -Glossary 89
Appendix B -Problem Solving 90

Page 1 Rev 2.6
1. PRODUCT OVERVIEW
1PRODUCT OVERVIEW
1.1. Overview
The Case Communications 6944 series industrial cellular VPN router offers a single, flexible platform
to address a variety of wireless communications needs with over-the-air configuration and system
monitoring for optimal connectivity. This router enables wireless data connectivity over public and
private LTE cellular networks at 4G speeds.
The 6944 series router has dual SIM’s for backup, 2 or 4 LAN ports, 1 port could be changed to
Ethernet WAN connection (for fixed internet fail over to cellular). An optional 802.11 b/g/n Wi-Fi
interface access point and client operations supports connectivity to IP applications in a variety of
different connection scenarios. RS232 and RS485 interfaces are provided to support Serial to IP
communication. The 6944 series router also support 2 x digital input and 2 x Digital output for alarm
applications.
The 6944 series router supports 9 to 48 VDC wide range power inputs, designed with reverse-voltage
protection mechanism for greater reliability. It is an advanced choice for universal wireless M2M
applications with reliable features for data transmission.
1.2. Features and Benefits
Industrial internet access
•Wireless Mobile Broadband 2G / 3G / 4G Connection
•Remote access to SCADA System for Industrial Automation
•Reduce high costs for on-site maintenance
Designed for industrial usage
•Power Input Range 9 to 48 VDC
•Industrial designed for harsh environment
•Compact metal casing for easy mounting
Secure and reliable remote connection
•Connection manager ensure seamless communication
•Support Multiple VPN tunnels for data encryption
•Firewall prevents unsafe and unauthorized access
Easy to use and easy maintenance
•User-friendly web interface for human interaction
•Easy configuration for deployment
•Support 3rd Party remote management cloud

Page 2 Rev 2.6
1. PRODUCT OVERVIEW
1.3. General Specifications
Cellular Interface
•Standards: FDD-LTE/TDD-LTE, WCDMA/UMTS/HSPA/HSPA+/EDGE/GPRS,
•2× SMA female antenna connector
•2 x SIM (3.0V & 1.8V)
Wi-Fi Interface (Optional)
•Standards: 802.11b/g/n, 300Mbps
•2 x RP-SMA male antenna connector
•Support Wi-Fi AP and Client modes
•Security: WEP, WPA and WPA2 encryption
•Encryption: TKIP, CCMP
Ethernet Interface
•Standard: IEEE 802.3, IEEE 802.3u
•Number of Ports: 6944: 4 x 10/100 Mbps, RJ45 connector
•1 x WAN interface (configurable on Web GUI)
•1.5KV magnetic isolation protection
Serial Interface
•1×RS232 (3 PIN): TX, RX, GND
•1 x RS485 (2 PIN): Data+(A), Data-(B)
•Baud rate: 300 bps to 115200 bps
•Connector: terminal block
•15KV ESD protection

Page 3 Rev 2.6
1. PRODUCT OVERVIEW
DI/DO Interface
•Type: 2 x DI + 2 x DO
•Connector: terminal block
•Isolation: 3KVDC or 2KVrms
•Absolute maximum VDC: 36VDC
•Absolute maximum ADC: 100mA
Other Interfaces
•1× RST button
•LED instruction: 1 x SYS, 1 x NET, 1 x USR, 3 x RSSI
Software
•Network protocols: DHCP, ICMP, PPPoE, HTTP, HTTPS, DNS, VRRP, NTP…
•VPN: IPSec, GRE, OpenVPN, DMVPN
•Policy: RIPv1/RIPv2/OSPF/BGP dynamic route (optional)
•Firewall & Filter: Port forwarding, DMZ, anti-DoS, ACL
•Serial port: TCP server and client, UDP
•Management: Web, 3rd party platform
Power Supply and Consumption
•Connector: 3-pin 3.5 mm female socket with lock
•Input voltage range: 9~48VDC
•Power consumption:
Idle: 100 mA@12V
Data link: 400 mA (peak) @12V
Physical Specification
•Ingress Protection: IP30
•Housing & Weight: Metal, 300g
•Dimension: 104mm x 104mm x 38mm (excluding antenna)
•Installations: Din-rail mounting
Environmental
•Operation temperature: -40~+75℃
•Store temperature: -40~+85℃
•Operation humidity: 5% to 95% non-condensing

Page 4 Rev 2.6
1. PRODUCT OVERVIEW
1.4. Mechanical Specifications
Dimension: 104mm x 104mm x 38mm (excluding antenna)
1.5. Package Checklist
The 6944 series Router includes the parts shown in below, please verify your components.
NOTE: if any of the below items is missing or damaged, please contact your sales representative.
Included equipment
•1 x Case Communications 6944 Series Industrial Cellular VPN router with Wi-Fi
•1 x 10-pin 3.5 mm male terminal
block for RS232/RS485/DI/DO

Page 5 Rev 2.6
1. PRODUCT OVERVIEW
•1 x 3-pin 3.5 mm male terminal block with lock for power supply
•1 x Ethernet cable
•1 x Quick Start Guide
Optional Accessories (sold separately)
•3G/4G cellular antenna
Stubby antenna Magnet antenna
•35mm Din-rail mounting kit
•AC/DC power adapter (12VDC,
1.5A; EU/US/UK/AU plug optional)

Page 6 Rev 2.6
2. INSTALLATION
2INSTALLATION
2.1. Product Overview
•Front Panel
①Wi-Fi Antenna
②MAIN Cellular Antenna
③LED Indicator
④Serial port & DIDO
⑤Ethernet port
⑥Wi-Fi Antenna
⑦AUX Cellular Antenna
•Left Side Panel
① SIM Card Slot
② Reset Button
③ Power Connector
④ Grounding Stud

Page 7 Rev 2.6
2. INSTALLATION
2.2. LED Indicators
Name
Color
Status
Description
SYS
Green
Slow Blinking (500ms duration)
Operating normally
Fast Blinking
The 6944 is initialising
Off
Power is off
NET
Green
On
Registering to Highest priority network
service (depend on Radio, e.g. Radio
support LTE as Highest priority network).
Fast Blinking (500ms duration)
Registering to Non-Highest priority
network service (depend on Radio, e.g.
Radio support LTE as Highest priority
network, then WCDMA and GPRS is
non-highest priority network).
Off
Registration has failed
USR: SIM
Green
On
The 6944 is trying cellular connection
with SIM1
Fast Blinking (250ms duration)
The 6944 is trying cellular connection
with SIM2
Off
No SIM detected
USR: Wi-Fi
Green
On
Wi-Fi is enabled but without data
transmission
Blinking
Wi-Fi is enabled and data transmission
Off
Wi-Fi is disable or initialize failed
Signal Strength
Indicator
Green
On, 3 LED light up
Signal strength (21-31) is high
On, 2 LED light up
Signal strength (11-20) is medium
On, 1 LED light up
Signal strength (1-10) is low
Off
No signal
2.3. Ethernet Port Indicator
Name
Status
Description
Link indicator
On
Connection is established
Blinking
Data is being transmitted
Off
Connection is not established
NOTE：There are two LED indicators for each Ethernet port. Due to the chipset design the 6944
router will only light up the Green LED (Link indicator) on left side, if the right LED is Off it has no
meaning
2.4. PIN Definition of Terminal blocks
•Serial Port & DIDO

Page 8 Rev 2.6
2. INSTALLATION
PIN
RS232
RS485
DI
DO
Direction
1
--
--
--
DO1
Router-->Device
2
--
--
--
DO2
Router-->Device
3
--
--
--
COM
--
4
--
A
--
--
Router<-->Device
5
--
B
--
--
Router<-->Device
6
--
--
DI1
--
Router<--Device
7
--
--
DI2
--
Router<--Device
8
GND
--
--
--
--
9
TX
--
--
--
Router-->Device
10
RX
--
--
--
Router<--Device
•Power Input
PIN
Description
V+ (Red line)
Positive
V- (Yellow line)
Negative
PGND
GND
2.5. Reset Button
Function
Action
Reboot
Press the RST button within 3s under operation status
Factory Reset
Press the RST button between 3s to 10s, all LEDs blink few times then reboot
the router manually.
Run Normally
Press the RST button more than 10s, router will run normally without reboot or
factory reset.
2.6. Insert SIM card
•Insert / Remove SIM card
1. Make sure the power is disconnected.
2. Use a Phillips-head screwdriver to remove SIM slot cover.
3. Insert the SIM card(s) into the SIM sockets.
4. Replace the SIM slot cover.

Page 9 Rev 2.6
2. INSTALLATION
2.7. Install Antenna
•Connect the cellular antenna to the MAIN and AUX connector on the unit.
NOTE: The 6944 router supports dual antennas with MAIN and AUX connectors. The MAIN
connector is for receiving and transmitting data. The AUX connector is for enhancing signal strength,
and should be used with the MAIN Antenna.
•Connect the Wi-Fi antenna to the Wi-Fi connector on the unit.

Page 10 Rev 2.6
2. INSTALLATION
2.8. DIN-Rail Mounting
1. Use 4 pcs of M3x6 flat head Phillips screws to fix the DIN-rail to the router.
2. Insert the upper lip of the DIN-rail into the DIN-rail mounting kit.
3. Press the router towards the DIN-rail until it snaps into place.
2.9. Protective Grounding Installation
1. Remove the grounding nut.
2. Connect the grounding ring of the cabinet’s grounding wire onto the grounding stud and screw up
the grounding nut.
NOTE: Strongly recommended the router to be grounded when deployed.

Page 11 Rev 2.6
2. INSTALLATION
2.10. Power Supply Installation
1. Remove the pluggable connector from the unit, then loosen the screws for the locking flanges as
needed.
2. Connect the wires of the power supply to the terminals.
2.11. Powering On The 6944 Router
1. Connect one end of the Ethernet cable to the LAN port on the unit and the other end to a LAN
port on a PC.
2. Connect the AC power to a power source.
3. Router is ready when SYS LED is blinking.

Page 12 Rev 2.6
3. ACCESSING THE WEB PAGE
3ACCESSING THE WEB CONFIGURATION PAGE
3.1. PC Configuration
The 6944 router contains a DHCP server which will automatically assign an IP address to your PC,
however in some cases the user may need to change the network settings on their PC to accept the IP
address from the 6944. or you can configure a static IP address manually.
•Obtain an IP address automatically
The process required to do this differs depending on the version of Windows you are using.
NOTE: The following steps are based on Windows 7.
select Start » Control Panel » Network Connections. Right click Local Area Connection and
select Properties to open the configuration dialog box for Local Area Connection. Select Internet
Protocol (TCP/IP) and click Properties to open the TCP/IP configuration window. On the General
tab, select Obtain an IP address automatically and Obtain DNS server address automatically.
Click OK to complete TCP/IP configuration.

Page 13 Rev 2.6
3. ACCESSING THE WEB PAGE
•Set a static IP address
click "Use the following IP address" to assign a static IP manually within the same subnet of the
router.
NOTE：Default gateway and DNS server is not necessary if PC not routing all traffic go through the
6944 router.
3.2. Factory Default Settings
The 6944 router supports Web-based configuration interface for management. If this is the first time
you have configured the router, please refer to below default settings.
Username: admin
Password: admin
LAN IP Address: 192.168.5.1 (Eth0~Eth1/Eth3 bridge as LAN mode)
DHCP Server: Enabled

Page 14 Rev 2.6
3. ACCESSING THE WEB PAGE
3.3. Logging in to the 6944 Web Page
1. Start a Web browser on your PC (Chrome and IE are recommended), enter 192.168.5.1 into the
address bar of the web browser.
2. Then use the default username and password(admin/admin), to log in to the router.
.