Electrical Industry Today

ISDN Modem Market Outlook 2024–2032: Modest Growth at 0.87% CAGR Driven by Cloud Adoption and IoT Expansion

Despite the broader industry's transition toward fiber and mobile broadband, the ISDN modem market maintains a niche but steady demand due to its dependability, compatibility, and continued use in legacy systems. The market’s growth at 0.87% CAGR from 2024 to 2032 is supported by persistent needs in industrial automation, utility sectors, and VoIP-based transitions. ISDN modems will likely continue to be phased out in many consumer environments, but their presence in mission-critical infrastructure and emerging IoT ecosystems ensures their relevance for years to come.
Published 18 June 2025

ISDN Modem Market Overview

The Integrated Services Digital Network (ISDN) modem market continues to remain relevant for several critical applications across enterprise and industrial domains. As of 2024, the market is valued at USD 5.71 billion, up slightly from USD 5.66 billion in 2023. Although modern broadband and fiber technologies dominate new installations, ISDN maintains a presence in legacy systems, remote locations, and specialized communications environments. By 2032, the market is projected to grow to USD 6.12 billion, exhibiting a compound annual growth rate (CAGR) of 0.87% during the forecast period (2024–2032).

Key Market Drivers


  • Growing Demand for High-Speed Internet - While ISDN technology is not the fastest available, it remains a reliable option in areas with limited broadband access, particularly in remote and industrial zones where stable digital connectivity is essential.
  • Rising Adoption of VoIP Services - ISDN modems still play a supporting role in legacy enterprise phone systems. Businesses transitioning gradually to VoIP often maintain hybrid setups that include ISDN modems, particularly in rural branches or call center operations.
  • Increasing Popularity of Cloud-Based Applications - Cloud-based platforms rely on uninterrupted connectivity. In specific legacy network environments, ISDN modems are leveraged to ensure secure and redundant communication paths.
  • Expansion of the Internet of Things (IoT) - The rise of IoT in smart buildings, manufacturing, and utilities brings renewed interest in ISDN modems due to their dependability and ease of integration into existing industrial networks.
  • Government Initiatives for Digital Infrastructure Development - Many governments continue to support digital transformation in underdeveloped and rural regions. In such locations, ISDN remains a viable, cost-effective alternative where fiber or cable deployment is not feasible.


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Market Segmentation


  • By Connection Type: Basic Rate Interface (BRI), Primary Rate Interface (PRI)
  • By Application: Residential, Small & Medium Enterprises (SMEs), Large Enterprises, Government, Industrial
  • By Interface: Serial, Ethernet, USB
  • By End User: Telecommunications, IT & Networking, Industrial Automation, Defense, Utilities
  • By Region:
  • North America
  • Europe
  • Asia Pacific (APAC)
  • South America
  • Middle East & Africa (MEA)


Regional Insights


  • North America continues to use ISDN modems in legacy networks, particularly in the utilities and defense sectors.
  • Europe sees moderate demand due to phased transitions to IP-based networks but retains ISDN installations in rural regions and transportation infrastructure.
  • Asia Pacific shows promising growth, especially in industrial zones and emerging smart city projects.
  • South America and MEA benefit from government-led digital connectivity programs using ISDN infrastructure in areas where newer technologies are not yet viable.


Key Opportunities


  • Collaboration and Enterprise Communication: Integration of ISDN modems in hybrid communication setups, especially where reliability and compatibility with older systems are needed.
  • Internet of Things (IoT): Low-bandwidth, mission-critical IoT applications in energy, water treatment, and remote monitoring systems.
  • Cloud-Based ISDN Solutions: Combining legacy systems with cloud-hosted ISDN gateways to create scalable, secure architectures.
  • Unified Communications as a Service (UCaaS): ISDN gateways and modems are often used to connect legacy PBXs to UCaaS platforms.


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Competitive Landscape

Key players in the ISDN modem market are focusing on reliability, backward compatibility, and industrial-grade solutions. Some of the leading companies include:

  • Cisco Systems
  • Huawei Technologies
  • Advantech
  • Allied Telesyn
  • D-Link
  • Lantronix
  • Moxa
  • Netgear
  • Nokia Siemens Networks
  • Rockwell Automation
  • Sierra Wireless
  • u-blox
  • Westermo

These companies offer a wide range of solutions tailored for industries requiring robust and consistent network performance, especially in legacy and hybrid environments.

Explore our Global Report in Regional Languages

ISDNモデム市場 | ISDN-Modem-Markt | Marché des modems RNIS | ISDN 모뎀 시장 | Isdn调制解调器市场 | Mercado de módems RDSI

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