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