Not just German Telekom, several other operators around the globe deployed ATM in the 90s for ISDN services. However, just after a few years, most companies sta

Not just German Telekom, several other operators around the globe deployed ATM in the 90s for ISDN services. However, just after a few years, most companies started dropping ATM in favour of IP based networks. By "it failed to see real world usage", I meant, it failed to sustain itself in real world.