
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...
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...
15/07/2026
The 2026 FIFA World Cup is a big deal for DAZN, which has distribution rights in three markets: Italy, Spain, and Japan. Each requires a different editorial app...
15/07/2026
As sports-media organizations manage rapidly growing content libraries and incre...
15/07/2026
HBS director of digital Johannes Franken talks SVG Europe through the operation built to serve FIFA World Cup 2026 rights holders remotely from Stratford, east ...
15/07/2026
IBC has unveiled the conference program for IBC2026, with this year's event ...
15/07/2026
Software-defined wideband RF platform supports 96-kHz monitoring, streamlined fr...
15/07/2026
New AI-powered module enables broadcasters and content owners to extract dialogu...
15/07/2026
Weeklong gathering at EBU headquarters will test new IPMX capabilities and expand certified product ecosystem...
15/07/2026
Force Tech has announced the appointment of Bryan Adams, CTS, as Vice President of Integration. Adams will oversee AV and broadcast integration project delivery...
15/07/2026
USA Sports has announced an exclusive English-language agreement with the Bundes...
15/07/2026
ITV Sport's FIFA World Cup 2026 coverage has been produced from one of the m...
15/07/2026
Program will provide professional camera kits, training, and technical support to participating local newsrooms...
15/07/2026
San Francisco church becomes first U.S. deployment of the 2 M/E production switcher...
15/07/2026
Former ESPN and NFL Network executive to advise startup league on media, distribution, technology, and fan engagement...
15/07/2026
The Houston-based RSN is the live-game home of the Astros and Rockets...
15/07/2026
Launched alongside new FreqSoft installer
Designed to bridge the gap between hardware and software, Freqport's FreqInOut FO1 unit provides a simple way ...
15/07/2026
Save up to 55% on software until 23 July 2026
Expressive E have just launched their Summer Offer sale, with discounts of up to 55% now applied across their ...
15/07/2026
Real-time stem-separation tool updated
zplane have recently released a new and improved version of their real-time stem-separation plug-in which they say ma...
15/07/2026
A new benchmark in bass enhancement
Described as a new benchmark in bass enhancement , Baby Audio's latest release has been designed to augment the lo...
15/07/2026
DMC Production's AR 1 and AR 2 units reverse the conventional OB workflow, keeping all production-critical processing at the venue while operators work remo...
15/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
15/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
15/07/2026
GigaCloud, a leading Ukrainian cloud service provider, and Cubbit, the first geo-distributed cloud storage enabler, today announced a new Business Alliance Part...
15/07/2026
SMPTE, the global society for media professionals, technologists, and engineers, has announced the launch of the SMPTE 110th Anniversary Campaign, a fundraising...
15/07/2026
Studio Technologies, a leading manufacturer of high-quality audio, video, and fiber-optic solutions, unveils the new StudioComm Model 762 Stereo Level Control, ...
15/07/2026
COW Jobs: Producer, Virtual Events - Hybrid, Full Time, Salaried
Brie Clayton July 15, 2026
0 Comments
Producer, Virtual Events (Hybrid | Full-time | ...
15/07/2026
Brazilian media organization builds nationwide CDN with Broadpeak's high-performance software for low-latency streaming and new content distribution service...
15/07/2026
DHD announces a new utility designed to increase the efficiency of its audio mixing systems during initial installation and subsequent configuration.
Anyone w...
15/07/2026
BCNEXXT Brings Next-Generation Vipe to IBC2026, Breaking the 1:1 Channel-to-Server Ratio New innovations liberate broadcasters from legacy playout infrastructur...
15/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
15/07/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
15/07/2026
Wednesday 15 July 2026
Screeners and press pack now available: Gomorrah: The Or...
15/07/2026
Trinity's Treasures features Ruth Negga, Eleanor McEvoy, and David Norris, a...
15/07/2026
Join geographer Dr Susan Hegarty, Engineer Tim Joyce and Architect Orla Murphy a...
15/07/2026
Home to leading manufacturers, robotics pioneers, infrastructure builders and gaming, of course, Japan is one of the world's centers of AI - building across...
14/07/2026
South end zone videoboard, cloud-based control system will be ready for 2026 football season...
14/07/2026
Redesigned website, enhanced mobile app unify content, ticketing, and personalized fan engagement...
14/07/2026
Agreement spans sponsorship sales, digital monetization, radio production, and new practice facility naming rights...
14/07/2026
Independent league adds 14 regional sports network affiliates, growing distribut...
14/07/2026
New strategy aims to unify competitions, content, fan engagement, and commercial...
14/07/2026
ESPN and Disney+ become exclusive home of PFL events in key international MMA market...
14/07/2026
Gill will oversee engineering, technology, and sports operations across the company's 64 local television stations...
14/07/2026
Submitted by North American Broadcasters Association (NABA)
As broadcasters con...
14/07/2026
Modernized mobile unit combines HOME Apps, mc 56 console, and IP infrastructure ...
14/07/2026
Every match of the 32-team tournament will air across ION and Scripps Sports platforms in English and Spanish...
14/07/2026
FloHockey to stream every game of the annual international tournament under four...