ISDN was somewhat mandatory in Germany for internet access during the 90th. Carriers pushed it very hard.
The combination of both channels was a unique selling position to leave modem speed in the dust. 64kbps could be combined to 128kbps simultaneous download speed - of course, it costs you twice as much. ;)
The downside later on was, that it took a long time till the next generation was available, in Germany it was DSL.
The combination of both channels was a unique selling position to leave modem speed in the dust. 64kbps could be combined to 128kbps simultaneous download speed - of course, it costs you twice as much. ;)
The downside later on was, that it took a long time till the next generation was available, in Germany it was DSL.