Applicable Products Part number Description
ZETA-GEP-LTE4 (EU) Low Power LTE Cat 4 European Modem with GPIO and GNSS
ZETA-G-GPRS Entry Level GPRS Modem with GNSS (GL)
ZETA-N2-GPRS Entry Level GPRS Modem (GL)
ZETA-NEP-LTE4 (EU) Low Power LTE Cat 4 European Modem with GPIO
ZETA-NEP-LTEM (GL) Low Power Global LTE Cat M Modem with GPIO
ZETA-NLP-LTE1 (EU) Ultra Low Power European LTE Cat 1 Modem
ZETA-NLP-LTEM (GL) Ultra Low Power Global LTE Cat M Modem
ZETA-N-LTE (EU) High Performance LTE Cat 4 Modem with GPIO
ZETA-NSP-LTE1 (EU) Low Power European LTE Cat 1 Modem
Objective To connect embedded systems together using the internet requires the use of data sockets to send information from one location to another. This process has been around for a long time and there are methods available to communicate with servers and devices using sockets to establish a bi-directional communication link between two endpoints.
In general, there is a listening device and a dialling device. Servers are generally setup as listening devices and remote modems as dialling devices, but this is not always the case and there are many examples which differ from this generalisation.
There are certain requirements with both the listening devices and dialling devices which must be taken into consideration when setting up a communication link between two endpoints. This application note will discuss these points in more detail.
Solution Listening Device Requirements The listening device must be accessible on the network and be able to accept incoming data socket requests from remote devices. This usually means having a firewall with a few specific open ports to allow incoming requests to be accepted through the accessible ports. Devices on the internet which have open ports are immediately susceptible to attack from hackers, spammers, viruses and bots which exploit specific vulnerabilities in the listening device's operating system. As a result, many security measures have been developed to prevent unauthorised access, but care must be taken to ensure that these measures are effectively managed.
For a device listening on the internet, it would usually have a fixed IP address which does not change over time. This IP address can then be used by any remote device to communicate with the listening device in a comparable way to a phone number is used on a telephone.
This fixed IP address would be publicly available and any device legitimate or otherwise would be able to communicate with it. On a HTTP webserver, the server would have a fixed IP address and would be listening for incoming data traffic on port 80. Mapped to this IP address would be a domain name such as www.example.com'. When the user types in www.example.com' to their web browser, the web browser looks up the IP address using DNS and it returns the IP address of the server. The web browser then contacts the server's IP address directly on port 80 and the https webserver responds with the web page.
The exact same process can be applied to data socket connections using mobile devices.
The mobile device uses a fixed IP address SIM card.
The mobile device is setup to listen on a specific port i.e. 1024.
The mobile device opens its firewall to specific devices.
The mobile device waits for an incoming data socket connection.
The dialling device attempts to open a socket on the IP address of the fixed IP address SIM card on the listening port i.e. 1024
Dialling Device Requirements The dialling device can use any standard SIM card and does not require a specific setup or fixed IP address SIM card. As the dialling device is dialling out to the server it is not listening for incoming data connections and therefore does not need to be as concerned about security as the listening device.
Demonstration of Solution Resources:
PC with an installed Terminal Emulator' program: A Windows 10 laptop installed with Tera Term was used for the purpose of this guide.
Siretta Part Number: 61057 -ZETA-GEP-LTE4 (EU) Starter Kit (any ZETA starter Kit is suitable for this application)
Insert SIM card to the modem
Power on the modem
Connect the supplied serial port cable to the PC
Connect the antenna
As described in the Starter Kit Quick Start Guide
Open Hyperterminal on the PC (or your preferred terminal emulator: PuTTY, TeraTerm).
Select new connection. Name the new connection for reference in the future.
Name your port.
Choose the correct COM port. From the drop-down list, select the correct COM port your modem is connected to.
Configure the port with the following settings (These settings are standard for all of the ZETA Siretta modems):
Bits per second: 115200
Data bits: 8
Parity: None
Stop bits: 1
Flow control: Hardware
Note: The above procedure is set out in Initial Modem Set Up application note
GPRS Connection COM3 - Tera Term VT
File Edit Setup Control Window Help
//Set extended error messages
AT CMEE=2
//Set GPRS APN Name
AT CGDCONT=1, IP , APN Name
Outgoing Connection COM3 - Tera Term VT
File Edit Setup Control Window Help
//Set packet size and timeouts on context 1-6
AT#SCFG=1,1,300,90,600,50
//Open GPRS context 1-6 with GPRS Username and GPRS Password. (This will return your ISP assigned IP address)
AT#SGACT=1,1, username , password
//Open Socket on Port Number at IP Address
AT#SD=1,0, Port Number, IP Address ,255,0
// Close GPRS context 1-6
AT#SGACT=1,0
AT CGDCONT=1, IP , APN Name
AT#SGACT=1,1, username , password
AT#SD=1,0,1024, 080.080.080.081 ,255,0
Incoming Connection COM3 - Tera Term VT
File Edit Setup Control Window Help
//Open GPRS context 1-6 with GPRS Username and GPRS Password
AT#SGACT=1,1, username , password
//Setup Firewall
AT#FRWL=1, IP Address , Subnet Mask
Most recent headlines
05/01/2027
Worlds first 802.15.4ab-UWB chip verified by Calterah and Rohde & Schwarz to be ...
06/09/2026
June 9 2026, 23:00 (PDT) Dolby and MagentaTV Bring Fans Closer to the FIFA Worl...
04/08/2026
Dalet, a leading technology and service provider for media-rich organizations, t...
04/07/2026
April 7 2026, 19:00 (PDT) Detective Conan: Fallen Angel of the Highway Opens in...
02/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
02/07/2026
Standalone processors acknowledged for the innovation and value they bring to Pro AV
Cobalt Digital, a leading designer and manufacturer of signal processing ...
02/07/2026
Synamedia announced today the appointment of Dr Tzvi Gerstl as Chief Executive Officer. Paul Segre, who has served as CEO for the past six years, will transitio...
02/07/2026
Screen Australia backs audience-led filmmaking with new insight-driven initiativ...
02/07/2026
Screen Australia refines guidelines for Narrative Content Development and Docume...
02/07/2026
Maxon Autograph: Introduction to working with Tables
Simon Ubsdell July 1, 2026
0 Comments
An overview of Autograph's ridiculously powerful tables...
02/07/2026
Boston Conservatory's Soir e Breaks Records to Fund Student Scholarships The event achieved 127 percent of its fundraising goal in an evening celebrating ...
02/07/2026
How Adam Rosenwach Pivoted from Music to Med Tech Without Missing a Beat What do the rehearsal room and the boardroom have in common? More than you might thin...
01/07/2026
Broadcast Management Group (BMG) has announced the appointment of Kathy Samuels ...
01/07/2026
Shade has announced Custom Objects and Automations, a platform expansion releasing June 29, 2026, that adds database and workflow automation capabilities direct...
01/07/2026
FOR-A America has announced the addition of Jaz Wray and Fernando Cruz to its U.S. sales team. Both report to Ernie Leon, Senior VP and Head of Sales and Strate...
01/07/2026
NBC Sports will air all 15 MLB games nationally on Sunday, July 5, across NBC, P...
01/07/2026
Clear-Com has announced a wireless communications upgrade for Jeopardy! and Wheel of Fortune, deploying FreeSpeak II and FreeSpeak Icon systems across both prod...
01/07/2026
England's performance team will use Sony's STATSports APEX GPS tracking system to monitor player physical data in real time during FIFA World Cup 2026 m...
01/07/2026
Adder Technology has announced the appointment of Neil Hillier as Chief Executive Officer, effective July 1, 2026. Hillier succeeds Adrian Dickens, who transiti...
01/07/2026
Bitcentral, Inc. has announced a strategic transaction creating two separate companies. The Production and Playout business will continue as Bitcentral, now own...
01/07/2026
DAZN has announced results from DAZN48, its creator initiative for the FIFA World Cup 2026. Launched in April 2026, the program received thousands of applicatio...
01/07/2026
Sarah Rose, VP, global services, Daktronics (NASDAQ: DAKT), will be inducted into the Information Display and Entertainment Association (IDEA) Hall of Fame at t...
01/07/2026
Gravity Media and the World Economic Forum's production team provided broadc...
01/07/2026
Insight Productions has announced the launch of Insight Storm, a 53-foot mobile broadcast unit built for esports production. The truck is built around a Ross Vi...
01/07/2026
ESPN has announced several content initiatives marking America's 250th anniversary, as part of The Walt Disney Company's Disney Celebrates America pro...
01/07/2026
Eleven production kits, REMI workflows, and cloud distribution bring 40 World Cu...
01/07/2026
The conference also discussed the opportunities offered an industry that is endu...
01/07/2026
The Mountain West Conference has announced the launch of MW , a direct-to-consumer streaming platform powered by Kiswe. The platform will carry live Mountain We...
01/07/2026
New AI Assistant, Multi-channel Audio, ARA2 improvements & more
Tracktion's DAW software has just received its latest major update, gaining a selection ...
01/07/2026
Stammering, stuttering, strangulated tones
The Crow Hill Company's latest creation promises to be the most original sound set they've produced to d...
01/07/2026
Exclusive run of limited-edition modelling pedals
Sweetwater and Andertons M...
01/07/2026
The National Film and Video Foundation (NFVF) is pleased to announce that the ca...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
Manfrotto Introduces UNCOVER, the new premium camera bag collection for modern h...
01/07/2026
Blackmagic Design Powers Houston Tamil Sangam Literacy Competition
Brie Clayton July 1, 2026
0 Comments
Volunteers use ATEM Mini Pro, Blackmagic Desig...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
PlayBox Technology has published State of Broadcast Infrastructure 2026, an in-depth industry research report examining the technologies, operational challenges...
01/07/2026
LONDON, UK, 1 JULY Jigsaw24 has appointed Alan Henry as Head of Sales for Media and Entertainment, reinforcing its continued investment in helping broadcaster...
01/07/2026
Content Vault, the patent-pending secure content distribution platform protecting high-value media from disclosures, theft and unauthorised access, today announ...
01/07/2026
Bitcentral, Inc. a leading provider of enterprise software and digital media solutions for news, sports and entertainment broadcasters, as well as streaming pla...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
01/07/2026
Groundbreaking First Nations Screen Business Accelerator launched through nation...
Applicable Products Part number Description 
