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Activity Areas

Amongst our customers are manufacturers of telecommunications, measurement and test equipment in Germany, Austria, Switzerland, Belgium, The Netherlands, Great Britain, Sweden and the USA.

PDH Systems

  • Design and development of a long haul digital 34 Mbps transmission system over various transmission media
  • Integrated line and multiplex equipment for optical transmission of 16 x 2 Mbps digital signals
  • Development of plesiochronous line and multiplex equipment for optical transmission of 2, 8, 34 and 140 Mbps digital signals
  • MPEG2 transmission system for 8 and 34 resp. 45 Mbps

SDH Systems

  • Specification and design of units for STM1 (electrical and optical) for DSLAMs
  • Measurement equipment for the recording of quality parameters of electrical and optical STM-1 interfaces
  • Units for the customer specific processing of overhead information of SDH systems
  • Realisation of an optical STM-4 interface
  • MPEG2 transmission system for STS1 (SONET)
  • Planning and execution of comprehensive system tests on SDH equipment
  • Unit for EoS-transfer
  • Support service up to STM-64

Components for ATM Systems

From the start we have aimed to early gain comprehensive knowledge about new developments in the marketplace. In order to also be a competent partner for our clients in the field of ATM technology we have been looking into this technology since 1993.

Initial activities included:

  • Making suggestions for RACE projects together with two other partners in 1993
  • In 1994, guest scientist work of one employee in Switzerland, RACE Fellowship at ASPA in Basel

Based on our knowledge, we developed during the following years::

  • Several units for an ATM based WLL-System
  • Concepts for E3 – and STM1 – ATM uplink boards for DSLAMs
  • Functional units for a high-bit-rate ATM measurement equipment
  • APC-based ATM backplane measurement system

Projects for Subscriber Access

Just like in other areas our experience with products for the subscriber access dates back to the years before the foundation of Teleconnect GmbH. As early as in the 1980s, the Dresden branch of the former Institute for Telecommunications was responsible for the specification, realisation, test runs and maintenance of an FTTH network for analogue telephony and television distribution in the Dresden area. The network was in operation until 1995 and maintained by Teleconnect employees during that time.

Further projects/products since 1990:

  • Circuit packs for the OPAL network of the Deutsche Telekom AG
  • Specification/production re-start, tests and maintenance of network compatibility of PCAs for OPAL
  • Crossconnect units, signalling converter
  • Units for ISDN equipment (AEI adapter, ISDN Repeater)
  • xDSL – e. g. Voice Pair Gain Systems: PCM2A (with 4B3T or 2B1Q coding), PCM4A, PCM11A
  • Concept IAD
  • ISDN network termination (NTBA, intelligent NT)
  • ISDN telefons
  • CLIP box
  • Modems: SHDSL, ADSL, ADSL2/2+, VDSL(1), VDSL(2)
  • Measuring equipment: ADSL, VDSL(2)


  • Design of a graphical presentation layer for the Service-PC of a long haul transmission system (OS/2) as well as various graphical user interfaces for production tests and putting into operation of functional units
  • Specification, coding and realisation of exchange and interface functions for the SISA system
  • Implementation and application of the management interfaces QD2 and Q3
  • Programming and data base design for a graphical user terminal with maintenance and management functions for PDH and SDH network elements
  • Generation of Private-MIBs and realisation of Proxy-Agents for SNMP

Optoelectronic Modules and Systems

Development and experiences with optoelectronic modules and systems using polymer or glass fibre.

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Projects with Micro Controller and DSPs

  • Software for back-up power supplies for transmit/receive modules for mobile telephone networks
  • Conception and realization of a measurement equipment for full- and half-channel measurements
  • Development of a party line modem family
  • Software for error location in cables (DSP)
  • Solar energy driven telephone pillar for a railway company
  • Embedded webserver (also with own IP stack)
  • Ethernet/ISDN converter for TCP/IP based management connections (own IP stack)
  • ATMega based COM server and interface converter
  • Ethernet and IP on controllers with 8, 16 and 32 bit

Data Interfaces

  • Development of component parts to support X, V and I interfaces (X.21, X.25, X.51,     V.24, V.35, V.36, I.430) for application in telecommunication systems
  • RS232 traffic logger
  • RS232 interfaces for system management connections in different projects, e.g. partyline modem, QD2-F-Port (SISA)
  • RS232 modem support for remote maintenance
  • RS485 interfaces for different applications, e. g. backplane communication, partyline modem, system management connection, QD2 (SISA)
  • USB development board, application as terminal equipment and server interface
  • Bridge implementation for Fast Ethernet (10BASE-T, 100BASE-TX) networks
  • Experiences with Ethernet
    – in design, measurement, conformance statements
    – board design
    – IEEE 802.3, 10BASE-T, 100BASE-TX/FX, 1000BASE-ZX/LX/SX
    – IEEE 802.3ae, 10GBASE-LR/ER
    – Experiences with ICs from Infineon, Intel, Marvell, Realtek and Vitesse
    – Protocol Implementation Conformance Statements (PICS)
    – Switch technologies, VLAN
  • SPI-Tracer (ISA PC-card for logging of external data up to bitrates of 1 Mbps)
  • SNMP agent for monitoring of several RS232/optical connectable devices with appropriate management interfaces
  • Design of optical interfaces for
    Ethernet, Fast Ethernet, Gigabit Ethernet, FDDI und Fiber Channel
  • Back plane busses H.110 and CellBus
  • Development of an hand-held EIB bus monitor, as an auxiliary equipment for electric installers. In addition to the monitor function, the equipment offers the possibility to influence and simulate actuators.

Free Space Optics

Development of optical transmitter and receiver modules with data rates of:

  • 10 Mbps Ethernet
  •   10 Mbps transparent
  •   52 Mbps transparent
  • 155 Mbps transparent
  • 622 Mbps transparent with/without clock synchronisation
  •  1 Gbps transparent with/without clock synchronisation

Optical and electrical interfaces at the network site with management functions like:

  • PC management software
  • Remote maintenance
  • Statistic functions
  • SNMP management

Auxiliary equipment :

  • Wavelenght converter
  • E1 interface converter

On 21 July 2000, Teleconnect transfered the Optical Products Division to LightPointe Communications, Inc.

Software Projects

Teleconnect develops dedicated application software for PCs as well as control software and tools for the development, test and operation of electrical and optical modules.

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As a contribution to an initiative by Saxony’s federal government for more high-speed internet access points in rural areas, we studied a sample of twelve rural locations. Following the examination of supply and demand, suggestions were made for each location as to how and with the help of which technology the respective location could be connected to the information highway. The study was compiled by a project group consisting of TU Dresden, Tele-Kabel-Ingenieurgesellschaft mbH Chemnitz and Teleconnect GmbH.

The main focus of Teleconnect’s input was on the analyses of network access topology and technology. www.smul.sachsen.de/laendlicher_raum/1355.htm