Proscend M331 User manual

M331
Industrial 4G LTE Dual SIM
Cellular Router
User Manual
Version 1.00

M331 User Manual I
Table of Contents
1Introduction...........................................................................................................................1
1.1 Features................................................................................................................................1
1.2 Dimensions...........................................................................................................................1
1.3 Specifications ........................................................................................................................2
2Hardware Installation............................................................................................................3
2.1 Install the SIM Card................................................................................................................3
2.2 LED Indicators........................................................................................................................3
2.3 Reset Button .........................................................................................................................3
2.4 Connecting I/O Ports..............................................................................................................4
2.5 LED Indicators of Ethernet Port................................................................................................4
2.6 RS-232 and RS-485 pinouts .....................................................................................................4
2.7 Connecting the Power Supply..................................................................................................5
2.8 Antenna Installation...............................................................................................................5
2.9 DIN-rail Mounting..................................................................................................................6
2.10 Wall Mounting.......................................................................................................................7
3Configuration via Web Browser...........................................................................................8
3.1 Access the Web Configurator...................................................................................................8
3.2 Navigate the Web Configurator ...............................................................................................9
4Web Menu Item > Status..................................................................................................... 11
5Web Menu Item > System ...................................................................................................13
5.1 Time and Date.....................................................................................................................13
5.2 Logging...............................................................................................................................15
5.3 Alarm .................................................................................................................................17
5.4 Dying Gasp..........................................................................................................................20
5.5 COM Ports ..........................................................................................................................20
5.6 Ethernet .............................................................................................................................23
5.7 Modbus..............................................................................................................................23

M331 User Manual II
5.8 Client List............................................................................................................................24
6Web Menu Item > WAN........................................................................................................25
6.1 Connection Table.................................................................................................................25
6.2 Ethernet .............................................................................................................................25
6.3 IPv6 DNS.............................................................................................................................28
6.4 Health Check.......................................................................................................................28
7Configuration > Cellular......................................................................................................30
7.1 Config.................................................................................................................................30
7.2 GPS ....................................................................................................................................30
7.3 SIM Config ..........................................................................................................................32
7.4 SIM Usage...........................................................................................................................35
7.5 SMS ...................................................................................................................................36
7.6 Serving Cell .........................................................................................................................37
7.7 DNS....................................................................................................................................38
8Web Menu Item > LAN.........................................................................................................39
8.1 IPv4....................................................................................................................................39
9Web Menu Item > IPv6.........................................................................................................41
9.1 IPv6 Config .........................................................................................................................41
10 Web Menu Item > IP Routing ..........................................................................................42
10.1 Static Route.........................................................................................................................42
10.2 Policy Route ........................................................................................................................44
11 Web Menu Item > VPN.........................................................................................................46
11.1 OpenVPN............................................................................................................................46
11.2 IPSec ..................................................................................................................................53
11.3 GRE....................................................................................................................................64
11.4 PPTP Server.........................................................................................................................66
11.5 L2TP...................................................................................................................................67
12 Web Menu Item > Firewall...............................................................................................69
12.1 Basic Rules..........................................................................................................................69

M331 User Manual III
12.2 Port Forwarding...................................................................................................................70
12.3 DMZ...................................................................................................................................71
12.4 Management IP ...................................................................................................................71
12.5 ACL ....................................................................................................................................72
12.6 IP Filter...............................................................................................................................73
12.7 MAC Filter ..........................................................................................................................76
12.8 URL Filter............................................................................................................................77
12.9 NAT....................................................................................................................................78
12.10 IPS..................................................................................................................................78
13 Web Menu Item > Service ...............................................................................................80
13.1 SNMP.................................................................................................................................80
13.2 Dynamic DNS ......................................................................................................................83
13.3 MQTT.................................................................................................................................84
13.4 UPnP..................................................................................................................................85
13.5 SMTP..................................................................................................................................85
13.6 IP Alias................................................................................................................................86
13.7 QoS....................................................................................................................................87
14 Web Menu Item > Management ......................................................................................90
14.1 Identification.......................................................................................................................90
14.2 Administration.....................................................................................................................92
14.3 Contacts / On Duty...............................................................................................................93
14.4 SSH ....................................................................................................................................94
14.5 Web ...................................................................................................................................95
14.6 Telnet.................................................................................................................................95
14.7 Firmware............................................................................................................................96
14.8 Configuration ......................................................................................................................96
14.9 Load Factory........................................................................................................................96
14.10 Restart............................................................................................................................97
14.11 Schedule Reboot..............................................................................................................97

M331 User Manual IV
14.12 Fail2Ban..........................................................................................................................98
14.13 O’smart...........................................................................................................................99
15 Web Menu Item > Diagnosis.........................................................................................100
15.1 Ping..................................................................................................................................100
15.2 Traceroute ........................................................................................................................100
16 Troubleshooting Guide................................................................................................. 102
16.1 Troubleshooting Information...............................................................................................102

M331 User Manual 1
1Introduction
Proscend M331 Industrial 4G LTE Cellular Router comes with 3 Gigabit LAN ports, 1 Gigabit WAN
port and dual SIM support to enable critical industrial applications and reliable IoT connectivity for
optimal performance and network redundancy. The M331 is designed with a rugged compact
enclosure for DIN-rail or wall mounting to install where tight spaces. The M331 features digital I/O,
serial ports (RS-232, RS-485), DC and AC power inputs to provide flexible installation in demanding
environments.
Proscend M331 is a highly secure and high-performance cellular router used in a main or backup
Internet communications. To fit the deployments at scale and simplify network management,
Proscend M331 can work with IoT Management System O’smart, allowing the administrator to
remotely monitor, manage, and configure the M331 Cellular Router anywhere, anytime.
1.1 Features
Support multi-band connectivity with FDD LTE / TDD LTE / WCDMA / GSM / LTE CAT4.
Built-in dual Micro SIM slots, serial ports (RS-232, RS-485), and DI/DO interfaces.
Detachable antenna design for using a wide variety of external antennas.
LED indicators for connection and data transmission status.
Industrial rated from -30 to +70°C for use in harsh environments.
Support serial communication protocols for flexible connectivity.
Enhance security and encryption for authentication and transmission.
1.2 Dimensions

M331 User Manual 2
1.3 Specifications
Cellular Interface
4G: FDD LTE, TDD LTE
3G: WCDMA
2G: GSM
LTE Data Rate: CAT 4, 150Mbps (DL), 50Mbps (UL)
Hardware Interface
2 x Micro SIM slots (push-push type)
3 x LAN 10/100/1000 Mbps Ethernet port
1 x WAN 10/100/1000 Mbps Ethernet port
1 x RESET Button
1 x RS-232 (TX/RX/GND)
1 x RS-485 (D+/D-/GND)
1 x DI (Non-Isolated), 1 x DO (Non-Isolated)
2 x SMA connectors for detachable LTE antenna
1 x SMA connector for detachable GPS antenna
1 x DC jack for AC-DC power adapter
1 x DC power input
Physical Characteristics
Enclosure：Metal Case
Dimensions (W x H x D)：103 x 25 x 93 mm
Weight：350 g
Installation：DIN-rail / Wall mounting
LED Display
1 x Power status
1 x LTE Signal strength
1 x SIM status
2 x Speed and Link status (each LAN/WAN port)
Power Supply
Power Consumption：7 Watts (Max)
DC jack power Input：12 VDC
Terminal block power input: 8 ~ 26 VDC
Software
Network Protocols
IPv4, IPv6, IPv4/IPv6 dual stack, DHCP server and client,
PPPoE, Static IP, SNTP, GPS sync time, DNS Proxy,
Message Queue Telemetry Transport (MQTT Broker)
Routing/Firewall
NAT, Virtual Server, DMZ, MAC Filter, URL Filter, IP Filter,
Static Routing, IPS, SPI, Policy Route
VPN
OpenVPN, IPSec (3DES, AES128, AES196, AES256,
MD5, SHA-1, SHA256), GRE, PPTP, L2TP
Others
DDNS, QoS, UPnP, SMS Action, GPS TCP Push
Alarm
DI, DO, SMS, VPN/WAN Disconnect, SNMP Trap, E-mail
Management
Web GUI for remote and local management, CLI
Syslog monitor
SNMP
Remote management via SSH v2, HTTPS
Local management via Telnet, SSH v2, HTTP/HTTPS
Environment
Operating Temperature -30 ~ +70°C
Storage Temperature -40 ~ +85°C
Ambient Relative Humidity 10 ~ 95%HR
(non-condensing)
Humidity 0 ~ 95%HR
(non-condensing)
Standards and Certifications
NCC & BSMI CNS15936 & CNS15598-1

M331 User Manual 3
2Hardware Installation
This chapter introduces how to install and connect the hardware.
2.1 Install the SIM Card
STEP 1: Before inserting or removing the SIM card, ensure that the power has been turned off, or
the power connector has been removed from the M331 Cellular Router.
STEP 2: Using a screwdriver to remove the metal protective cover first, insert the SIM card into the
card slots. The cut-off edge of the SIM card on upper SIM slot 1 (lower SIM slot 2) is to the
left (right).
STEP 3: Push the SIM card and lightly press it to lock into the slot.
STEP 4: Remove the SIM card, lightly press it and it will pop out of the slot.
NOTE:
Please use the industrial SIM card operating from -40°C to +105°C to ensure proper cellular router operation.
2.2 LED Indicators
The following table explains the LED indicators on the front panel.
LED
Off
On
Slow
Fast
Heartbeat
SYS
Power down
Power up
N/A
N/A
N/A
SIM
Not working
Connected
Connecting
Error
Reading
Signal
No signal
High signal
Medium signal
Low signal
N/A
2.3 Reset Button
Function
Operation
Reset
Press the button for 1 seconds.
Reset to default setting
Press the button for more than 5 seconds.

M331 User Manual 4
2.4 Connecting I/O Ports
There are four terminals on the terminal block with two terminals used for digital input and two
terminals used for digital output.
DI: Low (+0 to +3V) / High (+8 to +40V)
DO: Open Collect (maximum 30V/300mA)
2.5 LED Indicators of Ethernet Port
There are two LED indicators for each of three LAN ports and one WAN port.
2.6 RS-232 and RS-485 pinouts
NOTE: RS-232 and RS-485 share the common ground pin “G”.
RS-232
Pin
Signal
Direction
TX
Transmit Data
Output
RX
Receive Data
Input
G
Signal Ground
-
Pin
Description
DI +
Digital Input
DI -
DO +
Digital Output
DO -
LED
Blinking
On
Off
1000M
N/A
1000Mbps
10/100Mbps
LINK
Data Transmitting
LINK UP
LINK DOWN

M331 User Manual 5
RS-485
Pin
Description
D +
Serial Port, Data+ (A) wire
D -
Serial Port, Data- (B) wire
G
Signal Ground
2.7 Connecting the Power Supply
Powering the M331 Cellular Router is by either a terminal block or a DC jack.
One terminal block is on the front panel.
The power input voltage range is 8 ~ 26 VDC.
One DC Jack is on the front panel.
The power input voltage is 12 VDC.
2.8 Antenna Installation
Three SMA connectors placed on the left panel are for connecting to external LTE and GPS
antennas.
MAIN: for LTE Transmit and Receive
AUX: for optional LTE Receive for better downstream speed
GPS: for GPS

M331 User Manual 6
2.9 DIN-rail Mounting
STEP 1: Use the screws to install the DIN-rail kit to attach at the rear side of the device.
NOTE: Three screw types are flat head M3 x 4 mm.
STEP 2: Hook the unit onto the DIN-rail.
STEP 3: Push the bottom of the unit towards the DIN-rail until it locks in place.

M331 User Manual 7
2.10 Wall Mounting
STEP 1: At the bottom side of the device, use two screws to install each bracket.
NOTE: Each screw type is flat head M3 x 6 mm.
STEP 2: Use the screws to attach the bracket of the device for wall mounting.
NOTE: These screws are not included in the package. The head of each screw is less than 7 mm in
diameter, the shaft is less than 3 mm in diameter, and the length is less than 10 mm in
diameter.

M331 User Manual 8
3Configuration via Web Browser
3.1 Access the Web Configurator
The web configuration is an HTML-based management interface for quick and easy set up of the
cellular router. Monitoring of the status, configuration and administration of the router can be
done via the Web interface.
After properly connecting, the hardware of cellular router as previously explained. Launch your
web browser and enter http://192.168.1.1 as URL.
The default IP address and sub net-mask of the cellular router are 192.168.1.1 and 255.255.255.0.
Because the cellular router acts as DHCP server in your network, the cellular router will
automatically assign IP address for PC or NB in the network.
Title Bar Panel > Selecting Language
You can choose the different language display of web GUI.
Logging in the Router
In this section, please fill in the default User Name root and the default Password 2wsx#EDC and
then click Login.

M331 User Manual 9
3.2 Navigate the Web Configurator
The main screen is divided into three parts as below.
A -Title Bar, B -Navigation Panel and C -Main Window.
(1) A : Title Bar
The title bar provides some useful instructions that appear the situation of router.
(2) B : Navigation Panel-Main Menu and Sub Menu
The menu items are divided into main and sub menu to configure the settings and get the status of
connectivity on the navigation panel.
Navigation Panel
Main Menu
Sub Menu
Status
Device overall status
System
Time and Date, Logging, Alarm, Dying Gasp, COM Ports, Ethernet,
Modbus, Client List
Title Bar
Item
Description
Language
Choose your language from the drop-down list on the upper right corner
of the title bar.
Login / Logout
Click to login or logout the web GUI.

M331 User Manual 10
WAN
Connection Table, Ethernet, IPv6 DNS, Health Check
Cellular
Config, GPS, SIM Config, SIM Usage, SMS, Serving Cell, DNS
LAN
IPv4
IPv6
IPv6 Config
IP Routing
Static Route, Policy Route
VPN
OpenVPN, IPSec, GRE, PPTP Server, L2TP
Firewall
Basic Rules, Port Forwarding, DMZ, Management IP, ACL, IP Filter, MAC
Filter, URL Filter, NAT, IPS
Service
SNMP, Dynamic DNS, MQTT, UPnP, SMTP, IP Alias, QoS
Management
Identification, Administration, Contacts / On Duty, SSH, Web, Telnet,
Firmware, Configuration, Load Factory, Restart, Schedule Reboot,
Fail2Ban, O’smart
Diagnosis
Ping, Traceroute

M331 User Manual 11
4Web Menu Item > Status
This page shows overall status of device.
Status > SIM#1 and SIM#2
Item
Description
SIM Status
The status of SIM.
Operator
The name of operator.
Modem Access
The access type between LTE module and base station.
IMSI
The IMSI number of the SIM card.
IMEI
The IMEI number of the SIM card.
ICCID
The ICCID number of the SIM card.
Phone Number
The phone number of the SIM card.
Band
The current connected band.
PLMN
The Public LAN Mobile Network ID.
Roaming
The status of Roaming.
RSSI
RSSI is measured over the entire bandwidth.
RSRP
RSRP is the received power of 1 RE average of power levels received
across all Reference Signal symbols within the considered measurement
frequency bandwidth
Status > SIM#1-APN/APN2 and SIM#2-APN/APN2
Item
Description
IPv4 Address
The IPv4 address that assigned by operator.
IPv4 Mask
The IPv4 mask that assigned by operator.
Default Gateway
The default gateway that assigned by operator.
Connected
The status of connection. “Yes” means Connected; “No” means
Disconnected.
IPv4 Conn Time
The connection time of IPv4 network.
Tx Kbps
The uplink speed in Kbps.
Rx Kbps
The downlink speed in Kbps.
Tx/Rx KBytes
The accumulated TX/RX in KBytes.
Tx/Rx Dropped Packets
The dropped packets of Tx/Rx.
IPv4 DNS Server #1/#2/#3
The DNS server address that assigned by operator.

M331 User Manual 12
Status > LAN Ethernet
Item
Description
IPv4 Address
The IPv4 address of the M331 device.
IPv4 Mask
The IPv4 mask of the M331 device.
IPv6 Address
The IPv6 address of the M331 device.
IPv6 Prefix
The IPv6 Prefix of the M331 device.
IPv6 DNS Server #1/#2/#3
The IPv6 DNS server address.
IPv6 Conn Time
The connection time of IPv6 network.
Tx Kbps
The speed of uplink in Kbps.
Rx Kbps
The speed of downlink in Kbps.
Tx/Rx KBytes
The accumulated TX/RX in KBytes.
Tx/Rx Dropped Packets
The dropped packets of Tx/Rx.
Status > WAN Ethernet
Item
Description
IPv4 Address
The IPv4 address of the M331 device.
IPv4 Mask
The IPv4 mask of the M331 device.
IPv4 Gateway
The default gateway that assigned by operator.
IPv4 DNS Server #1/#2/#3
The IPv4 DNS server address.
Tx Kbps
The speed of uplink in Kbps.
Rx Kbps
The speed of downlink in Kbps.
Tx/Rx KBytes
The accumulated TX/RX in KBytes.
Tx/Rx Dropped Packets
The dropped packets of Tx/Rx.
Status > Connected VPN Connections
Item
Description
OpenVPN
Total connected number of OpenVPN.
IPSec
Total connected number of IPSec.
GRE
Total connected number of GRE.
PPTP Server
Total connected number of PPTP Server.
L2TP
Total connected number of L2TP.

M331 User Manual 13
5Web Menu Item > System
This system section allows you to configure the following items, including Time and Date, Logging,
Alarm, Ethernet Ports, and Client List.
5.1 Time and Date
This section allows you to set up the time and date of router and NTP server. There are two modes at Time
and Date Setup, including Get from Local System and Get from Time Server. The default mode is Get from
Time Server.
For Time Zone Setup, the Daylight Savings Time allows the device to forward/backward the amount of
time from Ahead of standard time setting automatically when the time is at the Daylight Savings duration
that you have set up before.
The Time Server feature makes M331 active as Tim Server for LAN side clients to get the time through
NTP/SNTP protocol.

M331 User Manual 14
System > Time and Date > Time Server
Item
Description
System > Time and Date > Time Zone Setup
Item
Description
Daylight Saving
Turn on / off the Daylight Savings feature. Select from Off or On. The
default is Off.
Ahead of standard time
The forward / backward minutes when enter/leave Daylight Savings
duration. Default is 60 mins.
Start Date/Start Time
Time to enter Daylight Savings duration.
The Month range is 1~12;
1 - Jan. 2 - Feb. 3 - Mar. 4 - Apr. 5 –May 6 - Jun.
7 - Jul. 8 - Aug. 9 - Sep. 10 - Oct. 11 - Nov. 12 - Dec.
The Week range is 1~5;
1 - first week in month.
2 - second week in month
3 - third week in month
4 - fourth week in month
5 - fifth week in month
The Day range is 0~6;
0 - Sunday (The start day of a week)
1 - Monday
2 - Tuesday
3 - Wednesday
4 - Thursday
5 - Friday
6 - Saturday
The Hour range is 0~23;
The Min range is 0~59;
End Date/End Time
Time to leave Daylight Savings duration.
Same with Start Date/Start Time.

M331 User Manual 15
System > Time and Date > Time Server
Item
Description
Server mode
Turn on/off the time server.
Server port
The UDP port listened by time server.
5.2 Logging
This section allows cellular router to record the data and display the status of data.
5.2.1 Logging > Logging
(1) Logging section provides you to control all logging records.
(2) Users need to select Apply to confirm your settings.