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 ...
07/10/2026
Dalet, a leading technology and service provider for media-rich organizations, today announced the latest Long-Term Supported (LTS) release of Dalet Flex. Build...
08/09/2026
Comcast Technology Solutions (CTS) has announced a multi-year agreement with A E...
08/09/2026
Spectra Logic today announced the availability of Media Insight, a new capabilit...
08/09/2026
Rogers Communications and Quebecor have announced a 12-year sublicensing agreement for French-language national NHL games beginning with the 2026-27 season. TVA...
08/09/2026
Skyline Communications and Bridge Technologies will demonstrate two integrations...
08/09/2026
Boland Communications will make the European debut of its 4K55HDR7SNB 55-inch super-narrow-bezel monitor at IBC2026 (Stand 12.C57, RAI Amsterdam, September 11-1...
08/09/2026
Ateme and Comcast Technology Solutions (CTS) have announced a collaboration comb...
08/09/2026
Haivision has joined the IBC Accelerator Media Innovation Programme as part of t...
08/09/2026
Blackmagic Design has announced price reductions on its PYXIS 6K and Cinema Camera 6K models, effective immediately through Blackmagic Design resellers worldwid...
08/09/2026
AI-Media will demonstrate its LEXI Suite at IBC2026 (Booth 5.C34, September 11-1...
08/09/2026
Bitmovin and Ad Insertion Platform (AIP) have announced the first live deploymen...
08/09/2026
Grass Valley will demonstrate story-centric media workflows at IBC2026 (Booth 9.A01, RAI Amsterdam, September 11-14), connecting newsroom production, content ma...
08/09/2026
M2A Media and Ateme have announced a partnership integrating Ateme's video processing solutions into M2A Media's MediaToAnywhere platform for live sport...
08/09/2026
Ikegami will exhibit at IBC2026 (Stand 12.A31, RAI Amsterdam, September 11-14), including a Day 1 introduction of new cameras in the UNICAM XE series. Additiona...
08/09/2026
Broadcast industry analysts will be gathering plenty of insights at the 2026 IBC Show this weekend in Amsterdam, but Caretta Research has offered up some though...
08/09/2026
SENSHI and DAZN have announced a global broadcast partnership that will bring SENSHI's live events free to viewers in more than 200 markets. The partnership...
08/09/2026
New architecture built with Evertz will bring 4K HDR to Monday Night Football, N...
08/09/2026
Built for rap producers, by rap producers
Sauceware Audio, the independent plug-in company founded by Grammy-nominated producer Jacob (Travis Scott, 21 Sava...
08/09/2026
Classic Sound Techniques design revived
Warm Audio's latest release delivers a meticulous recreation of the preamp circuitry employed by the Sound Techn...
08/09/2026
Latest soft synth inspired by the Memorymoog
XILS Lab have just launched a software instrument that draws its inspiration from Moog's iconic Memorymoog,...
08/09/2026
The Airport Chaplain takes off as SBS's biggest launch of 2026
8 September, 2026
Media releases
1.67 million viewers on National Total TV to date
Best...
08/09/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
08/09/2026
Mo-Sys, the world-leading developer of virtual production, camera robotics and image tracking technology, has completed a business restructuring, which has incl...
08/09/2026
New York, September 8, 2026 The TSAmediaHUB audiovisual contribution and distribution infrastructure developed by Telef nica's Audiovisual Services area re...
08/09/2026
Expanded Riyadh operation brings Asharq and Thmanyah services together on a resilient on-premises Pebble platform.
Pebble, the leading automation, content mana...
08/09/2026
Techex, a pioneering leader in live video workflows, will showcase its broadest software feature set to date at IBC 2026 (Stand 2.B45), extending its lead in so...
08/09/2026
Visitors to Grass Valley's booth at IBC2026 will be introduced to new Framelight X capabilities that connect content acquisition, management, editing and pu...
08/09/2026
BCNEXXT will showcase the latest evolution of Vipe at IBC2026 (Stand 2.B09), introducing a series of innovations designed to deliver higher-quality audience exp...
08/09/2026
Bitmovin, a provider of video streaming solutions, has partnered with Ad Insertion Platform (AIP), a leading innovator in advanced ad insertion technologies, to...
08/09/2026
Brainstorm, a leading manufacturer of real-time graphics and augmented and virtual production, is announcing a major package of enhancements to its Suite 7 soft...
08/09/2026
Big Blue Marble is supporting TDF, French infrastructure and network operator, broadcasting Digital Terrestrial Television (DTT) and radio services, as a techno...
08/09/2026
Agents work inside a single production environment, from incoming wire copy to a live studio show...
08/09/2026
Building on their strategic partnership, Ceeblue and Layercake make the unthinkable possible: scalable sub-second streaming over standard DRM, SSAI, and CDN wor...
08/09/2026
Brainstorm, a leading manufacturer of real-time graphics, augmented and virtual production, is completing the environment for fast-paced broadcast production wi...
08/09/2026
A SaaS portfolio built to work together, helping operators grow audiences, monetise smarter and run leaner, on their own terms
At IBC 2026 (stand 1.B49) Synam...
08/09/2026
Accedo, global provider of video streaming software and services, has been selected by PlayOn Sports, a national leader in high school sports technology, to exp...
08/09/2026
LiveU, the leader in live IP-video solutions, is enabling The Associated Press to take global newsgathering to the next stage with intelligent connectivity and ...
08/09/2026
Mediagenix, a global leader in smart content solutions to profitably connect the right content to the right audience, today announced the latest evolution of it...
08/09/2026
Compact, power-efficient X Platform performance brings broadcast-grade reliability and ultra-low latency to space-constrained remote production (REMI) workflows...
08/09/2026
Zixi, the leader in live video delivery and workflow orchestration, and Kiloview, a leading provider of professional IP video encoding and decoding solutions, t...
08/09/2026
Collaboration gives content owners scalable CDN capacity and broadcasters enhanced flexibility, including for C-band transition planning
Quortex today announce...
08/09/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
08/09/2026
Telos Alliance and Pluxbox Announce Dynamic Media Facility Integration Partnersh...
08/09/2026
J nger Audio Showcases Industry-First S-ADM Cloud Workflow at IBC 2026
Search
Dolby, MainConcept, Techex and J nger Audio will showcase the industry's ...
08/09/2026
Tuesday 8 September 2026
Sky Go gets a major upgrade for Sky Glass and Sky Stream customers
Today, Sky launches a new version of the Sky Go app for Sky Glass ...
08/09/2026
Documentary thriller simulating a Russian attack on UK soil will culminate in a live final episode reuniting the playersTuesday 8 September 2026
Trailer releas...
08/09/2026
Tuesday 8 September 2026
Jamie Demetriou and Amelia Dimoldenberg to host next t...
08/09/2026
Wuppertal September 8, 2026
Riedel Introduces New OnAir Headset PlatformRiedel Communications today announced the launch of its new OnAir headset platform, a...
Applicable Products Part number Description 
