Re: Actually ISDN still is popular in Germany
ISDN is norm used for phone systems (most places i goto have 2 ISDN lines that provides 2 phone lines per ISDN box all with the same number)
been looking into FTTP lease lines (100mb fiber berar with but paying for 10/10 with option to go up in speed at any time) you can run Sip lines over it and has a 5 hour SLA agreement
only down side its about £430-500 (excluding VAT!) its £420 for 10/10 and around £500 for 100/100 (thats before you add each sip line at around £10 each) but some business places cant get FTTC (the DP box in big warehouses units is inside the unit itself)