Sony Pixel Power calrec Sony

Incoming and Outgoing Data Socket Connection using a Siretta Modem

27/03/2025

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
LINK: https://www.siretta.com/2025/03/incoming-and-outgoing-data-socket-conn...
See more stories from sequoia

Most recent headlines

05/01/2027

Worlds first 802.15.4ab-UWB chip verified by Calterah and Rohde & Schwarz to be demoed at CES 2026

Worlds first 802.15.4ab-UWB chip verified by Calterah and Rohde & Schwarz to be ...

06/09/2026

Dolby and MagentaTV Bring Fans Closer to the FIFA World Cup 2026 in Germany with Dolby Vision and Dolby Atmos

June 9 2026, 23:00 (PDT) Dolby and MagentaTV Bring Fans Closer to the FIFA Worl...

04/08/2026

Dalet Announces Commercial Availability of Dalia, Bringing Media-Aware Agentic AI to Enterprise Productions

Dalet, a leading technology and service provider for media-rich organizations, t...

04/07/2026

Detective Conan: Fallen Angel of the Highway Opens in Dolby Cinemas Across Japan, Presented in Dolby Atmos and Dolby ...

April 7 2026, 19:00 (PDT) Detective Conan: Fallen Angel of the Highway Opens in...

26/06/2026

SVG GameDay, Ep. 21: Minnesota Vikings Allan Wertheimer - Large-Scale Shows in Minny

In-venue and creative video staffers at the professional and collegiate level ha...

26/06/2026

Strike Fighter League Announces Second Online Tournament, Set for July 25 in Las Vegas

Strike Fighter League (SFL), a professional air combat digital sport combining f...

26/06/2026

InfoComm 2026: Wisycom Announces MPR60 Firmware Update, MATF Antenna Matrix, and PFL RFoF Box

Wisycom has announced three new additions to its professional wireless ecosystem...

26/06/2026

Eurovision Services Inaugurates Expanded Master Control Room in Madrid

Eurovision Services inaugurated an expanded Master Control Room (MCR) in Madrid on June 1, 2026, building on a broadcast hub the company has operated in the cit...

26/06/2026

Midco Sports and University of North Dakota Renew Broadcast and Sponsorship Partnership

Midco Sports and the University of North Dakota (UND) have announced a two-year ...

26/06/2026

G&D and VuWall Appoint Vutec as Exclusive South Africa Distributor

Guntermann and Drunck (G&D) and VuWall, both part of the Panoptec Technologies Group, have appointed Vutec (Pty) Ltd as exclusive distributor for their KVM and ...

26/06/2026

Visit Seattle Launches Drone Scoreboard at Space Needle for FIFA World Cup 2026

Visit Seattle, the official destination marketing organization for Seattle and King County, has launched what it describes as the world's first drone scoreb...

26/06/2026

CP Communications Provides RF and Wireless Support for 2026 NBA Draft at Barclays Center

CP Communications provided RF video, audio, and crew communications support for ...

26/06/2026

Reimagined MoonPay X Games League Kicks Off With Three-Day Event in Sacramento

Produced by longtime partner Echo Entertainment, the action-sports property is now a team-based year-round league The inaugural season of the MoonPay X Games L...

26/06/2026

MultiDyne Acquires MRMC, Expands into Camera Robotics and Motion Control

The deal establishes MultiDyne Robotics and Motion Control, maintaining the well-known MRMC brand.MultiDyne Video & Fiber Optic Systems has acquired the assets ...

26/06/2026

TNT Sports Heads Into Year 2 of NASCAR Return With New NEP Truck, Expanded In-Car Experience

PX1 will debut at Sonoma as TNT leans into super-slo-mo, drones, SMT data integr...

26/06/2026

Ratings Roundup: USMNT-Australia Draws 23M Viewers; Mexico-South Korea Is Most-Watched Spanish-Language Soccer Match Ever

Ratings Roundup is a rundown of recent rating news and is derived from press rel...

26/06/2026

David Kuckhermann brings calabash to Celemony Tonalic

Virtual session musician plug-in gains new percussion options Celemony's latest update for their virtual session musician platform complements the exist...

26/06/2026

Softube unveil the Console 1 Compact

Half-size model joins Console 1 line-up Shortly after the release of their new Flow Studio controller, Softube have announced the launch of another new surf...

26/06/2026

ELT Group and Rohde & Schwarz sign a cooperation agreement to explore commercial opportunities in electromagnetic warfare and defense

ELT Group and Rohde & Schwarz sign a cooperation agreement to explore commercial...

26/06/2026

Lightware Powers Teddy Swims UK And Europe Tour With Adva...

For Teddy Swims sold-out I've Tried Everything But Therapy tour, event technology specialists, PRG, provided video, automation and lighting across 19 date...

26/06/2026

Taurus TPN powers AV workflows at NurnbergMesse

Modern exhibition and event venues face the challenge of seamlessly integrating traditional conference technology, professional broadcast workflows and IP-based...

26/06/2026

FCC Adopts New Cybersecurity Requirements for Alerting Systems

Share Copy link Facebook X Linkedin Bluesky Email...

26/06/2026

Study: Roku Most Used But Not Highest Rated Streaming Platform

Share Copy link Facebook X Linkedin Bluesky Email...

26/06/2026

Samsung Ads Announces First Shoppable CTV Partners

Share Copy link Facebook X Linkedin Bluesky Email...

26/06/2026

Gray Media Names Annie Cordell General Manager of WMBF

Share Copy link Facebook X Linkedin Bluesky Email...

26/06/2026

Neko Oji: The Guy That Got Reincarnated as a Cat Edited with DaVinci Resolve Studio

Neko Oji: The Guy That Got Reincarnated as a Cat Edited with DaVinci Resolve Stu...

26/06/2026

Adobe to Acquire Topaz Labs

Adobe to Acquire Topaz Labs Brie Clayton June 25, 2026 0 Comments Adobe has seen strong demand for its AI products for creatives, including Adobe Fire...

26/06/2026

Berklee Students Earn Dedicated Section at Raindance Film Festival in London

Berklee Students Earn Dedicated Section at Raindance Film Festival in London Five documentary short films produced in the Africana Studies Department screen a...

26/06/2026

Automating post-production workflows with Baselight, Daylight, Nara & FilmLight API. New York. 8 July 2026

Catch up on the latest developments across Baselight and Daylight v7, Nara and F...

26/06/2026

DFT installs second Polar HQ at China News Film Confirming Position as China's Leading 8K Film Preservation Partner

26. June 2026 News DFT is pleased to announce that a second Polar HQ film s...

26/06/2026

New documentary Freedom Founder: Thomas McKean and the American Revolution comes to RT

New documentary Freedom Founder: Thomas McKean and the American Revolution airs ...

25/06/2026

Launching a Career in Broadcast Engineering: Academic Paths and Essential Certifications

Launching a Career in Broadcast Engineering: Academic Paths and Essential Certif...

25/06/2026

SVG Students To Watch: Jude Kieffer, Ball State University

This superstar shooter/storyteller from Central Indiana hopes to make his mark in the blossoming sports-documentary and -features space In the live-sports-vid...

25/06/2026

Presidio and NHL Renew Multiyear North American Technology Partnership

Presidio and the National Hockey League have announced a multiyear renewal of their North American partnership. Presidio will remain an Official Technology Inno...

25/06/2026

Strike Fighter League Hits the Industry as First Professional Air Combat Sport

Strike Fighter League (SFL) is the world's first professional air combat digital sport that combines elite human performance and physical immersion with cut...

25/06/2026

Rise Reveals 2026 Worldwide Mentoring Cohorts to Support Future Industry Leaders

Rise, the award-winning advocacy group for gender diversity in the broadcast and media technology sector, is pleased to announce the global mentoring cohort for...

25/06/2026

MLB Network To Air American Association of Professional Baseball All-Star Game for First Time on July 15

The 2026 American Association of Professional Baseball (AAPB) All-Star Game will...

25/06/2026

Mediaproxy Partners with HVS for U.S. Broadcast Market

Mediaproxy has named Heartland Video Systems (HVS) as its exclusive partner for US television broadcasting. The Wisconsin-based systems integrator will represen...

25/06/2026

Backblaze Inks Five-Year Multi-Exabyte Data Storage Agreement with CoreWeave

Backblaze has formed an agreement with CoreWeave to create The Essential Cloud for AI. Under the multi-exabyte, $335 million agreement, Backblaze will provide...

25/06/2026

Clear-Com FreeSpeak Cell Tested by RTL Deutschland on 5G Network at Nrburgring

Clear-Com has announced the successful deployment and testing of FreeSpeak Cell by RTL Deutschland during a live event production at the N rburgring race circui...

25/06/2026

Mobile TV Group Launches Full-Stack MTVG Production Platform, Powers Angels Broadcast Television

Mobile TV Group (MTVG) has announced the launch of the MTVG Production Platform,...

25/06/2026

Sony Pictures Entertainment Announces $100 Million Investment in Cosm

Sony Pictures Entertainment (SPE) has announced a $100 million strategic investment in Cosm as lead investor in the company's Series C financing round, acqu...

25/06/2026

FOX Sports Renews Concacaf Gold Cup Rights and Adds Nations League Through 2029

FOX Sports and Concacaf have announced a multi-year media rights agreement making FOX Sports the U.S. English-language home of the Concacaf Gold Cup and Concaca...

25/06/2026

InfoComm 2026: Daktronics and Grass Valley Win rAVe Pubs Best Solution for Large Venue or Live Events

Daktronics and Grass Valley have received the rAVe Pubs Best Solution for Large ...

25/06/2026

Music Production for Women announce Soundlab 2026

Six free workshops across two days Global music education platform Music Production for Women (MPW), have just announced a brand new and highly anticipated ...

25/06/2026

CIOKS launch the DC7 v2

Popular pedalboard PSU gets an upgrade The DC7 v2 is a new and improved version of CIOKS' renowned effects pedal PSU, and is said to be the thinnest, mo...

25/06/2026

Rev Ocean reverb from Arturia

Optimised for lush, enveloping sounds Described as an instantly rewarding reverb , the latest addition to Arturia's range of creative effects plug-ins ...

25/06/2026

Just 48 hours until GearExpo UK!

27 June 2026, Westminster University Harrow Campus GearExpo UK is now upon us, with just two days to go until 150 of the worlds top pro-audio brands and ind...

25/06/2026

The Name You Know, The Lineup You'll Love - SBS2 Returns

The Name You Know, The Lineup You'll Love - SBS2 Returns 25 June, 2026 Media releases SBS Viceland rebrands as SBS2 on Friday 21 August, bringing the c...

25/06/2026

Sports and Dramas Drive April Viewing Patterns in Nielsen's Latest Gauge Reports

Cable Gains Share for Second Consecutive Month in Six-Month-High Finish, Boosted...