Teletel

What Teletel does

Teletel S.A. is a privately held Greek software and electronics design and development company founded in 1995 and headquartered in Athens, with a 25-year track record in the space, defense, and aeronautics sectors. Its core offering is the proprietary iSAFT product line — a family of modular Data Front Ends and Link Analysers that validate and simulate satellite on-board data networks across the canonical spacecraft protocol set (SpaceWire, SpaceFibre, MIL-STD-1553, CAN/CANopen, WizardLink, and Time-Triggered Ethernet) plus complementary Power Distribution Units and PCIe interface boards. iSAFT hardware is FMEA-certified for direct connection to flight units and is embedded inside customer-tailored Electrical Ground Support Equipment (EGSE) and Spacecraft Check-Out Systems (SCOEs) deployed at European primes and the European Space Agency.

The company monetizes through two streams: (1) the sale of proprietary iSAFT products and integrated EGSE systems as quote-based, mission-tailored turnkey solutions, and (2) engineering services spanning mission-critical on-board and ground software development (ECSS Cat B/C, DO-178B compliant), FPGA and PCB hardware design, and Independent Software Verification & Validation. Customer segments concentrate on major European space primes — Airbus Defence & Space, Thales Alenia Space, OHB, ESA — and international defense contractors including Thales, MBDA, Naval Group, and Hellenic Aerospace Industry, with operational reach extending to the US, Japan, and South Korea.

Teletel operates a direct enterprise field-sales motion supplemented by a single distribution agreement (Dimac Red Spa, 2019), conducts business at industry trade shows (Space Tech Expo Bremen, ESA Industry Space Days, AST Expo Munich), and maintains active roles in the International SpaceWire/SpaceFibre Working Group, ECSS TTEthernet working groups, and the EtherSpace Alliance. Its regulatory credentials — ISO 9001:2015, NATO C-M security clearance, and Hellenic Ministry of Defence Registry certification — are gating assets for classified defense and ESA procurement. The firm has contributed to 15+ space missions including EUCLID, JUICE, PLATO, IASI-NG, MICROCARB, FLEX, CSO, Galileo 2G, and Copernicus LSTM/CIMR/CRISTAL, with 200+ iSAFT installations globally.

Name

Teletel

Legal name

TELETEL S.A.

Website

https://teletel.eu

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

11–50 employees

Short description

Teletel is a Greek-owned software and electronics firm founded in 1995 that designs the proprietary iSAFT product line of satellite data-network test equipment (SpaceWire, SpaceFibre, MIL-STD-1553, CAN, TTEthernet, WizardLink) and provides EGSE systems plus ECSS-compliant on-board and ground software services to European space primes (Airbus D&S, Thales Alenia Space, OHB) and defense contractors.

Ownership category

akta.pro rank

Product category

Spacecraft Electrical Ground Support Equipment (EGSE)

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing (336419), Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing (334511), Computer Systems Design and Related Services (5415)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Guided Missiles & Space Vehicles & Parts (3760), Services-Computer Programming Services (7371)

akta.pro primary industry

Spacecraft Integration, Assembly & Test (IAT) (IMABACAK)

akta.pro secondary industries

Spacecraft Avionics, Flight Computers & Software (IMABACAI), Avionics Test, Simulation & Calibration Equipment (IMABAFAN)

Keywords

• Spacecraft test equipment
• Satellite EGSE systems
• On-board data networks
• Aerospace validation tools
• Flight software development

Headquarters

HQ city

Athens

HQ country

Greece

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure, Others

Revenue model

1. EGSE Products and Systems: Sale of proprietary iSAFT product line including Data Front Ends, Link Analysers, Power Distribution Units, and integrated EGSE systems. Products are customized for specific mission requirements and delivered as turnkey solutions.
2. Software Development Services: Development of mission-critical on-board and ground software for space and defense applications. Services include flight software, communication protocols, and ISVV (Independent Software Verification & Validation). Revenue derived from engineering service contracts.
3. Hardware Development Services: Microelectronics and hardware development services including FPGA design, VHDL coding, PCB design, and custom hardware solutions for defense and space applications.
4. Engineering Support Services: AIT/AIV support services, integration activities, training, and evolutive maintenance for delivered EGSE systems.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

TELETEL designs, develops and sells the proprietary iSAFT product line of rack-mount and PCIe Data Front Ends / Link Analysers for validating spacecraft on-board data networks (SpaceWire, SpaceFibre, MIL-STD-1553, CAN/CANopen, Time-Triggered Ethernet, WizardLink), together with customer-tailored Electrical Ground Support Equipment (EGSE) and Spacecraft Check-Out Systems (SCOE). It complements these hardware products with mission-critical on-board and ground software development services (ECSS Cat B/C, DO-178B), Independent Software Verification & Validation (ISVV), FPGA/microelectronics hardware design, and AIT/AIV engineering support to space primes, space agencies and defense contractors.

Product overview

TELETEL offers the iSAFT product line family alongside integrated EGSE Systems. The iSAFT family includes Data Front Ends/Link Analysers supporting multiple spacecraft data network protocols (SpaceWire, SpaceFibre, MIL-STD-1553, CAN/CANopen, WizardLink, Time-Triggered Ethernet) available as both rackmount systems and PCIe interface boards. The product line also includes Power Isolation/Distribution Units for EGSE infrastructure. Complementing the iSAFT products, TELETEL provides comprehensive customer-tailored Electrical Ground Support Equipment (EGSE) and specialized Spacecraft Check-Out Systems that combine the iSAFT components with additional capabilities for Payload/Instrument EGSE, Platform EGSEs, and custom SCOEs for satellite AIT/AIV operations. All products are designed for space mission compliance with ECSS standards.

Differentiator

Problem solved

Functional benefit

Products and services

• iSAFT SpaceWire Front-End / Link Analyser SpaceWire data interface unit with advanced asynchronous transmission, traffic generation and error injection for simulating SpaceWire devices and instruments. Supports 4-20 SpaceWire ports at programmable link speeds of 1-400 Mbps, RMAP/PTP CCSDS TM/TC protocols, with built-in packet recording and protocol analysis. Fully flight-equipment certified (FMEA) for connecting to flight units, intended for satellite primes and spacecraft integrators.
• iSAFT SpaceFibre Front-End SpaceFibre data interface unit with advanced asynchronous transmission and traffic generation. Supports 4-8 electrical and optical SpaceFibre ports configured at 1, 1.25, 2, 2.5, 3.125 or 6.25 Gbps, with RMAP/CPTP protocols, raw SpaceFibre capture and built-in recording function for full network debugging. Targeted at satellite primes building SpaceFibre-based spacecraft data networks.
• iSAFT MIL-STD-1553 Front-End Advanced MIL-STD-1553 (MilBus) Data Front-End with BC, RT simulation and traffic generation capabilities. Supports 1-4 independent dual redundant MIL-STD-1553 channels with BC simulation, multiple RT simulation and Bus Monitoring. Used in multiple EGSE test benches across Europe, US and South Korea.
• iSAFT CAN/CANopen Front-End CAN data interface with advanced asynchronous transmission and traffic generation capabilities for simulating CAN/CANopen devices. Features a 4-channel CAN interface with CAN/CANopen simulation, bus monitoring, recording and analysis based on Wireshark Protocol Analyser, plus optional IRIG time-stamping with 62.5 ns accuracy. Targets spacecraft and avionics systems using CAN/CANopen on-board data buses.
• iSAFT WizardLink Front-End WizardLink data interface with advanced asynchronous transmission and traffic generation capabilities. Supports 2-6 WizardLink ports with link rates in the range of 1.6-2.5 Gbps, built-in recording function, and full customization for customer-specific WizardLink protocols. Sold to space mission teams using WizardLink links (e.g., Copernicus LSTM).
• iSAFT TTEthernet Verification-SPY Tool Advanced network traffic capture, recording and analysis platform for independent verification of Time Triggered Ethernet features, data networks and protocols. Captures data packets on multiple Ethernet links (100/1000 Mbps, Copper and Optical) with time stamping and real-time protocol analysis, used to validate TTEthernet-based spacecraft data networks.
• iSAFT SpaceWire PCIe Interface Board (Quad / Octal) Advanced PCIe 4-port (Quad) or 8-port (Octal) SpaceWire interface board supporting SpaceWire simulation with error injection and built-in recording capabilities. Delivered with C driver API for Windows and Linux plus source code examples, intended for integration into host-based satellite test systems.
• iSAFT SpaceFibre PCIe Interface Board (Quad) Advanced SpaceFibre PCIe interface board (Quad port) supporting SpaceFibre simulation with built-in recording capability and supporting both electrical and optical interfaces. Delivered with C driver API for Windows and Linux.
• EGSE Systems (Customer-tailored Electrical Ground Support Equipment) Comprehensive customer-tailored Electrical Ground Support Equipment (EGSE) and specialized Spacecraft Check-Out Systems (SCOE), including Payload/Instrument EGSE, Platform EGSEs, Spacecraft Interface Simulators, Mechanism Drive Electronics EGSE, Avionics EGSEs, and Custom Simulators/SCOEs. Combines iSAFT Data Front Ends with additional capabilities for satellite AIT/AIV operations. Sold to space primes and agencies as turnkey test systems.
• iSAFT Mains Power Distribution Units Rack Mountable and Rack Cabinet Power Distribution Units offering either Isolated or Non-Isolated Mains Power Distribution. Isolated version provides galvanic isolation; non-isolated version provides safety protection with Type-B residual-current devices. The MPDU transformer is designed for low inrush current without current limiter, preventing start-up issues. Used in EGSE/SCOE/ATE infrastructure.
• iSAFT Mains Isolation & Transformer Unit 1-5 KVA Power Distribution Unit providing full isolation between input power source and output. Features low inrush current startup, Insulation Monitoring Device and differential protection. Used inside EGSE/SCOE/ATE systems for safe and reliable power distribution.
• Mission-Critical On-board and Ground Software Development Services Design and development of mission-critical on-board (flight) and ground software for space and defence applications, including flight software, communication protocol stacks (CCSDS TM/TC, CFDP), and Independent Software Verification & Validation (ISVV). Developed to ECSS Cat B/C and DO-178B standards. Sold under professional engineering service contracts to space agencies and primes.
• Microelectronics and Hardware Development Services (FPGA / PCB / VHDL) Microelectronics and hardware development services for space and defence applications, including FPGA design, VHDL coding and PCB design, providing custom hardware solutions for defence and space customers. Sold under engineering service contracts.
• Engineering Support Services (AIT/AIV, Integration, Training, Evolutive Maintenance) Managed engineering support services for delivered EGSE systems, including AIT/AIV support, integration activities, training and evolutive maintenance. Recurring service offering tied to the installed base of iSAFT products and integrated EGSE systems.

Quantifiable outcome

• 200+ global installations of iSAFT products
• +3 more outcomes

Named customers13 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

19 partnerships are on record, tiered core, major and standard.

• European Space Agency (ESA)coreStrategic or Co-development PartnerLong-standing partnership with ESA for EGSE development, space on-board software, and test tool development. Multiple GSTP contracts for Time Sensitive Networking/Time-Triggered Ethernet validation and SpaceFibre test tool development. Partner for major European space missions.
• Airbus Defence & SpacecoreStrategic or Co-development PartnerMajor prime customer for EGSE systems and software services. Collaborated on EUCLID, JUICE, Galileo 2G, Copernicus missions. Partnership for TTEthernet Verification-SPY Tool development with AirbusDS (now Ariane Group).
• Thales Alenia SpacecoreStrategic or Co-development PartnerMajor space prime and key customer for EGSE systems and on-board software development. Partner for EUCLID, PLATO, and ENVISION missions. Cooperation on spacecraft interface simulators and CDMS SCOE development.
• OHB System AGcoreStrategic or Co-development PartnerEuropean space prime and customer for EGSE systems including PLATO CDMS SCOE development in partnership with Thales Alenia Space UK.
• TERMAmajorImplementation/ SI/ Consulting PartnerDanish space and defense company. TELETEL served as subcontractor to TERMA for JUICE ground CFDP software development. Collaborated on MicroCarb Instrument EGSE with TERMA providing CCS and QLK software.
• RovsingmajorImplementation/ SI/ Consulting PartnerDanish space company. Partnership for EnVision Satellite Interface Simulator with TELETEL providing Data Front Ends. Collaboration on Copernicus CRISTAL and LSTM MPDU deliveries.
• Naval GroupmajorStrategic or Co-development PartnerEuropean leader in Naval Defence. Selected TELETEL as approved supplier and partner for international naval defense projects including FDI French frigates program for Hellenic Navy.
• SYDERALstandardTechnology or IntegrationSwiss space systems company. Customer for EUCLID ADPME EGSE delivery.
• SPACEBELstandardTechnology or IntegrationBelgian space software company. Customer for EUCLID on-board application software development.
• OIP Sensor SystemsstandardTechnology or IntegrationBelgian sensor systems company. Customer for ALTIUS Instrument EGSE software development.
• Dimac Red SpamajorChannel Partner/ Reseller/ DistributorOfficial distributor and representative partner appointed August 2019 for EU and Non-EU countries. Provides worldwide technical sales organization with in-depth technical and design-in expertise for European and relevant markets.
• SIROM ConsortiummajorStrategic or Co-development PartnerH2020 project with SENER, AIRBUS DEFENCE & SPACE, THALES ALENIA SPACE, LEONARDO and other partners for robotic handling of payloads in future space missions. TELETEL provided data and electrical interface validation for robotic testbeds.
• SOPHOS ConsortiummajorStrategic or Co-development PartnerHorizon Europe project coordinated by DSI for Smart on-board processing for earth observation systems. TELETEL implementing new generation EGSE for LEO constellation testing with partners DSI, Unibap, DLR, and University of Lûbeck.
• CARIOQA-PMP ConsortiummajorStrategic or Co-development PartnerHorizon Europe project for quantum accelerometer development. TELETEL leading EGSE development for validation of engineering models of scientific instruments. Partners include Airbus, iXblue, LEONARDO, CNES, DLR, and research institutions.
• HSM4COM ConsortiummajorStrategic or Co-development PartnerEuropean Defence Fund project for HSM/TPM device for securing micro/nano satellite and UAV communications. TELETEL serves as Technical Coordinator with 7 partners from 4 countries. 3-year project started April 2025.
• International SpaceWire and SpaceFibre Working GroupcoreStrategic or Co-development PartnerCore member where TELETEL actively contributes and presents results of relevant projects in the space sector. Prime contractor for ESA study on SpaceWire Network Management Service Suite.
• EtherSpace AlliancestandardStrategic or Co-development PartnerAlliance for 'Ethernet' in 'Space' applications. TELETEL member contributing to development of Ethernet standards for space missions.
• Hellenic Association of Space IndustrystandardStrategic or Co-development PartnerFounding member of Greek national space industry association for promoting Hellenic space technologies and applications.
• si-ClusterstandardStrategic or Co-development PartnerHellenic Space Technologies and Applications Cluster. TELETEL member for promoting Greek space industry and technologies.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• RUAG Space (Beyond Gravity): Swiss/European provider of spacecraft electronics, structures, and EGSE/test equipment. Most direct head-to-head with Teletel in spacecraft check-out systems serving ESA and European primes.
• SPACEBEL: Belgian space software and systems company supplying on-board software, EGSE, and simulators for ESA missions (EUCLID, etc.). Same customer set and overlapping EGSE/flight-software scope as Teletel.
• Terma: Danish defence/space company delivering ground software, CFDP, and EGSE components for ESA missions. Repeatedly co-operates with and competes against Teletel on missions such as JUICE.
• ROVSING: Danish space company providing satellite test systems and simulators. Partners and competes with Teletel on Copernicus, EnVision and similar missions, overlapping heavily on SCOE/EGSE delivery.
• SYDERAL: Swiss space systems integrator supplying EGSE/test benches and small-satellite subsystems. Customer of Teletel (EUCLID ADPME EGSE) with materially overlapping deliverables.

Broad incumbents

• Kongsberg Defence & Aerospace: Norwegian defence and space conglomerate providing avionics, test systems, and ground equipment. Overlaps with Teletel in high-reliability electronics and EGSE for space and defence.
• Airbus Defence & Space (in-house EGSE): Europe's largest space prime. Has its own EGSE and SCOE capabilities and is both Teletel's largest customer and a potential competitor when scope is in-sourced or bid directly.
• Thales Alenia Space (in-house EGSE): Major European space prime with internal SCOE/EGSE and flight-software teams, simultaneously Teletel's largest prime customer and a potential in-sourcing competitor.

Emerging players

• dSPACE GmbH: German provider of hardware-in-the-loop and embedded test/validation platforms with growing presence in aerospace. Adjacent technology competing for the same on-board network test budgets.

Regional players

• SITAEL: Italian small-satellite platform and avionics manufacturer providing on-board computers and test infrastructure to ESA. Comparable scale and Italian/European space market positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/teletel-s-a-

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Teletel