Products of Gerdes

Gerdes: ISDN Adapters, Telecom Components & Telecommunications Technology for Business

Gerdes is a German manufacturer of ISDN adapters, telecommunications components and telecom accessories for commercial and professional use. At Lieske Elektronik, trade customers and IT specialists find Gerdes products for ISDN installations, telephone systems and communication infrastructure – available for short-notice delivery.

German Manufacturer

ISDN

ISDN Specialist

Telecom Adapters & Components

CE Compliant

Gerdes – Telecommunications Technology and ISDN Solutions for Professional Use

Gerdes is an established German manufacturer in the telecommunications technology sector, specialising in ISDN adapters, terminal adapters and telecom accessories for commercial and institutional use. Products are designed for the requirements of businesses, IT system integrators and specialist trade customers.

The Gerdes portfolio includes ISDN terminal adapters (TA) for PC connection, ISDN routers, S0 bus components, surge protection for telephone systems and various accessories for ISDN installations. Products comply with German and European telecommunications standards and are CE certified.

Lieske Elektronik supplies Gerdes telecom products to business customers. Our B2B sales team advises IT system integrators, electricians and trade customers on selecting appropriate ISDN components – price enquiries and volume quotations available on request.

Certifications & Standards

✓	CE Compliant
✓	ITU-T I.430 / I.431 (ISDN BRI/PRI)
✓	ETS 300 compatible
✓	RoHS Compliant
✓	Made in Germany

Product Lines

ISDN adapters, telecom components and accessories for professional telecommunications installations

ISDN Terminal Adapters (TA) ISDN terminal adapters for PC connection via USB or serial port – enable the use of analogue terminals (fax, modem) on the ISDN basic rate interface (BRI, S0 bus) as well as data transfer and CAPI functionality for telecommunications software under Windows and Linux.	ISDN Routers & Access Technology ISDN routers for shared internet access via ISDN multi-device connections and primary rate interfaces (PRI). Suitable for small and medium-sized businesses, site networking and backup connections. With integrated firewall and NAT.

S0 Bus Components & Connections S0 bus distributors, termination resistors, connection sockets and patch cables for ISDN installations. Compatible with all common ISDN telephone systems and terminals. For new installations and extensions to existing ISDN infrastructure.	Surge Protection & Telecom Protection Surge protection devices for ISDN S0 lines, telephone lines and telephone systems. Protect sensitive telecommunications equipment from lightning surges and induced voltage spikes – compliant with IEC 61643 and VDE 0800.

Typical Application Areas

Gerdes telecom products in professional communications environments

► SME & Office Communications	◆ IT System Integrators	★ Telecom Trade Specialists

⚡ PBX Installation	✓ Public Institutions	► Legacy Systems & Maintenance

Why Gerdes?

Quality arguments for professional telecom procurement

German Quality & CE Certification

Gerdes products are developed in Germany and comply with CE requirements and relevant telecommunications standards – important for norm-compliant installations in businesses and public institutions.

Proven ISDN Compatibility

Gerdes ISDN adapters are compatible with all common PBX systems and network operators. Reliable CAPI 2.0 support for fax software, CTI applications and telecommunications software under Windows.

Spare Parts for Legacy Systems

Gerdes products are a reliable source of replacement and expansion components for existing ISDN infrastructure – critical for businesses still reliant on ISDN technology or needing to maintain legacy telephone systems.

Fast Availability at Lieske

Lieske holds Gerdes adapters and telecom accessories in stock – for urgent replacement on system failures and short-notice project requirements. Volume pricing for system integrators and trade customers on request.

Gerdes – Products in the Shop by Category:

► ISDN Telephone Systems
► ISDN Connection Sockets
► Telecommunications

► Telecom Cables & Adapters
► Telecom Surge Protection
► Telephone Systems

Frequently Asked Questions about Gerdes

Answers for telecom specialists and IT procurement

Do Gerdes ISDN adapters still work with current Windows versions? Gerdes ISDN adapters with USB connection and CAPI 2.0 drivers function under Windows 10/11 in most use cases. For older adapters, driver availability should be verified. CAPI-compatible telecommunications software (Tobit David, ESTOS, FaxSoft) is required on the software side. For critical production environments, a preliminary test on the target platform is recommended.

Are Gerdes products suitable for use with an ISDN PBX system? Yes. Gerdes ISDN adapters and S0 bus components are designed for connection to ISDN basic rate interfaces (BRI, S0 bus) and primary rate interfaces (PRI, S2M), and are compatible with PBX systems from all common manufacturers (Auerswald, Elmeg, Agfeo, Siemens HiPath). Terminal adapters can also be operated directly on S0 ports of PBX systems.

Why are ISDN components still needed even though ISDN is being phased out? Despite the phase-out of ISDN by Deutsche Telekom (2024), ISDN adapters and components remain in demand: many businesses continue to operate ISDN-capable PBX systems via All-IP gateways, require replacement parts for legacy systems or are migrating to VoIP in stages. Gerdes products reliably supply these transitional systems.

Gerdes Telecom Products – Enquiries & Volume Pricing Our B2B sales team advises on ISDN adapters, telecom components and replacement procurement.

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Categories with products from Gerdes

IT-Equipment ➤ Networks ➤ Modem ➤ ISDN ( 29 )
IT-Equipment ➤ Networks ➤ Router ➤ Router Accessories ( 1 )
Technology ➤ Telecommunication ➤ Cables / Connectors / Adaptors ( 8 )

Gerdes 2101Gerdes PrimuX 1S2M, ISDN server controller
Gerdes AG PrimuX 1S2M is a high performance signal processor for low PC exposure and minimal delays. With 30 channels, it is well suited for mediation and fax larger companies. The product good ...

Lieske Part No.: 573614
Mfg Part No: 2101

1.884,53 EUR

≈ £1,624.46 | ≈ $2,137.06