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 ...

07/10/2026

Dalet Flex LTS Delivers Smarter Media Operations from Ingest to Distribution

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

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...

20/08/2026

NEP's Summer of Soccer Didn't End at World Cup: 1,100+ Domestic Productions Follow the Final

From host-broadcaster and rightsholder support in June and July to MLS, NWSL, US...

20/08/2026

SVG GameDay, Ep. 27: San Jose Sharks' Emily Garner - Production Tales From the Shark Tank

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

20/08/2026

IBC 2026: Veritone To Showcase Enterprise AI and Media Supply Chain Automation

At IBC this year, Veritone (14.A56) is bringing two connected themes to the booth: architectural independence in enterprise AI, and the automation of the media ...

20/08/2026

Telestream and ScorePlay Partner to Connect Live Sports Ingest with Media Management

Telestream and ScorePlay have announced a partnership combining Telestream's...

20/08/2026

Grand Slam of Curling and Rock League Sign Multi-Year Deal with ESPN

The Grand Slam of Curling and Rock League have announced a three-year agreement with ESPN, bringing more than 300 hours of live curling coverage to U.S. audienc...

20/08/2026

Nielsen Announces Measurement Enhancements Ahead of Fall TV Season

Nielsen has announced a series of enhancements to its Big Data + Panel currency measurement methodology, taking effect August 31. The updates were developed in ...

20/08/2026

ORF Deploys Net Insight Nimbra Platform for Nationwide IP Contribution Network

Net Insight has been selected by service provider Big Blue Marble (formerly ORS Group) to provide its Nimbra platform as the core media transport solution for a...

20/08/2026

2026 US Open Launches Fan Activations Across New York City

The 2026 US Open will bring a series of free fan activations across New York City ahead of and during the tournament, which runs August 23-September 13. We...

20/08/2026

Bridge Technologies Adds TS Playout to VB330 and VB220 Monitoring Probes

Bridge Technologies will announce a transport stream (TS) playout feature for its VB330 and VB220 compressed monitoring probes at IBC2026 (Booth 1.A71). The fe...

20/08/2026

IBC 2026: ENCO To Showcase AI and Automation Solutions

ENCO will demonstrate solutions across captioning, translation, AI production tools, automation, and virtual production at IBC2026 (Stand 7.A34, Amsterdam RAI, ...

20/08/2026

IBC 2026: MultiDyne MRMC To Exhibit for First Time as Part of MultiDyne Organization

MultiDyne Video and Fiber Optic Systems will demonstrate camera robotics and mot...

20/08/2026

IBC 2026: Chyron Showcases Newsroom Workflow Solutions

Chyron will demonstrate news workflow solutions at IBC2026 (Stand 7.A23), marking the company's 60th anniversary. Highlights include updates to PRIME HTML, ...

20/08/2026

Spectrum SportsNet LA Now Available to Customers in Former Cox Markets

Spectrum SportsNet LA, the exclusive television home of the Los Angeles Dodgers, is now available to Spectrum customers in former Cox markets following the clos...

20/08/2026

IBC 2026: swXtch.io Launches Expanded SRT Distribution and Native Multicast Services

swXtch.io will unveil expanded Global SRT Distribution and native multicast tran...

20/08/2026

Transformation Church Deploys Riedel Artist Intercom System

Riedel Communications has announced that Transformation Church in the United States has deployed a communications system built around the Artist intercom ecosys...

20/08/2026

Apple at 50: Author and CBS Sunday Morning Correspondent David Pogue on How a Tech Giant Became a Media Powerhouse

The bestselling author and longtime Apple observer explores how product launches...

20/08/2026

Orlando Magic's David Storm Reflects on the Franchises First Year With Its New ST 2110 Control Room and Massive Center-Hung Videoboard

The Orlando Magic entered last season with a dramatically upgraded in-venue prod...

20/08/2026

Indiana Pacers Name DAZN Exclusive Streaming Home Beginning 2026-27 Season

Pacers Sports and Entertainment has announced a partnership with DAZN, making it the exclusive streaming home of Indiana Pacers basketball. A team-branded strea...

20/08/2026

Ratings Roundup: Scotty Scheffler Win Tops the Week, ESPN Posts Most-Watched WNBA Game Ever on Cable

Ratings Roundup is a rundown of recent ratings news and is derived from press re...

20/08/2026

NHL Announces Germany Expansion with FC Bayern Partnership and 2027 Global Series Games in Munich and Cologne

The NHL has announced two major developments tied to its Germany growth strategy...

20/08/2026

SoundBridges TURN server tutorial

Set up your own private remote collaboration infrastructure SoundBridge have recently put together a tutorial video that provides users with a step-by-step ...

20/08/2026

Neyrinck revive Avid D-Control surfaces

New V-Control Pro features restore basic functionality Neyrinck's V-Control software has long been keeping older Avid control surfaces compatible with n...

20/08/2026

ROSE AYLING-ELLIS BEGINS FILMING SERIES TWO OF ITVS BAFTA-WINNING THRILLER CODE OF SILENCE

TV, BritBox and Mammoth Screen have announced that filming is now underway on th...

20/08/2026

Nielsen Incorporates New Enhancements To Improve Its Data Measurement Leading Into The New Fall TV Season

New York August 19, 2026 Nielsen today shared a number of key enhancements t...

20/08/2026

FAST Sports Programming Surges at More Than Twice the Rate of Sports Channel Growth

New Gracenote Data Hub analysis finds sports program titles up 31.2% and individ...

20/08/2026

Charter Completes $34.5 Billion Cox Acquisition

Share Copy link Facebook X Linkedin Bluesky Email...

20/08/2026

SubtitleNEXT makes a significant leap in localisation eff...

At IBC, Profuz Digital will showcase at stand 8.A88 the SubtitleNEXT platform delivering innovative AI transcription integrations and stunning new features boos...

20/08/2026

Transformation Church Elevates Production Communications...

Riedel Communications today announced that Transformation Church, one of the fastest-growing and most influential digital ministries in the United States, has d...

20/08/2026

QuickLink Showcases New 4K Capabilities Across StudioEdge and StudioCall at IBC 2026

QuickLink Showcases New 4K Capabilities Across StudioEdge and StudioCall at IBC ...

20/08/2026

The Boys Season Five Graded with DaVinci Resolve Studio

The Boys Season Five Graded with DaVinci Resolve Studio Brie Clayton August 20, 2026 0 Comments Colorist Siggy Ferstl uses Depth Map to bring a three ...

20/08/2026

Adobe Firefly expands its creative AI studio: generate music, speech, and sound effects in one place

Adobe Firefly expands its creative AI studio: generate music, speech, and sound ...

20/08/2026

Broadpeak launches Multiview as a Service to accelerate m...

Multiview available via SaaS for streaming platforms and operators through broadpeak.io, with live demonstrations at IBC2026 Broadpeak , a leader in streaming ...

20/08/2026

Techex Appoints Stuart Almond as Chief Revenue Officer

Techex, a leading provider of live broadcast infrastructure solutions, has appointed Stuart Almond as Chief Revenue Officer, further strengthening its executive...

20/08/2026

MediaCity Studios upgrades with Avid

Avid today announced that MediaCity Studios has upgraded its production infrastructure with an enhanced end-to-end Avid production ecosystem, including the dep...

20/08/2026

MS Now to Launch $7.99 DTC Service

Share Copy link Facebook X Linkedin Bluesky Email...

20/08/2026

Nielsen Details Improvements to Audience Measurement Capabilities

Share Copy link Facebook X Linkedin Bluesky Email...

20/08/2026

Study: 174 Billion Illegal Streams During FIFA World Cup 2026

Share Copy link Facebook X Linkedin Bluesky Email...

20/08/2026

Prasad Opens New 8K/4K Film Preservation & Restoration Center

Share Copy link Facebook X Linkedin Bluesky Email...

20/08/2026

IPC Expands Brazilian Presence with New Channel Partner C...

IPC Expands Brazilian Presence with New Channel Partner CCATech Industry veterans Carlos Abrah o and Bruno Lopes strengthen local support and expand IPCs prese...

20/08/2026

Zixi Enters Mauritius Market Through Strategic Deployment...

Zixi Enters Mauritius Market Through Strategic Deployment with MTC Jockey Club Worlds Oldest Horse Racing Club in the Southern Hemisphere Selects Zixis Softwar...

20/08/2026

Scripps Research scientist to receive $2.76 million NIAID New Innovators Award

LA JOLLA, CA-Scripps Research assistant professor Tiantian Liu has received a five-year NIAID DP2 award from the National Institute of Allergy and Infectious Di...

20/08/2026

Audiences reveal appetite for multicultural Australia on-screen

Audiences reveal appetite for multicultural Australia on-screen 20 August 2026 Dr Georgie McClean, Dr Rebecca Huntley (L-R) By Dr Georgie McClean and Dr Rebec...

20/08/2026

How Mavis Studio Is Expanding Live Production Teaching at Sussex

How Mavis Studio Is Expanding Live Production Teaching at Sussex Brie Clayton August 19, 2026 0 Comments Hero image displays a student about to mix be...

20/08/2026

Vertical Unscripted Series Legal Queens Captured with Blackmagic Design

Vertical Unscripted Series Legal Queens Captured with Blackmagic Design Brie Clayton August 19, 2026 0 Comments Reality TV veteran Eric Gardner create...

20/08/2026

Transformation Church Elevates Production Communications With Riedel Artist and Bolero

Wuppertal August 20, 2026 Transformation Church Elevates Production Communicat...

20/08/2026

The music between the notes

The music between the notes Coming together In the middle of 2026, as conversations around artificial intelligence continue to raise questions about how musi...