As of 2023, the number of ISDN fixed telephone lines in Germany stood at 5.95 million units. The forecasted data from 2024 to 2028 indicate a sharp decline in ISDN lines, dropping from 4.74 million in 2024 to just 0.26 million by 2028. This represents an annual decrease rate, or CAGR, of approximately -46.4% over the five-year period. Year-on-year analysis reveals significant percentage reductions, highlighting a consistent downtrend.
Future trends to watch for include the continued transition towards digital and mobile communication technologies, as traditional ISDN usage declines. Expect further innovations and investments in fiber optic and broadband networks, potentially leading to the complete phase-out of ISDN lines in the near future.
