When i was taking voip classes 2 years back. I was told by the instructor (as i recall but i may be wrong), that you can map any amount of numbers to a PRI. Although E1 PRI has 30 channels, i can still map 100 numbers to it. Can some one pls confirm it ? is there any doc that explains this point also ?
Pls help me out
Well - you could start be researching the PRI/ISDN protocols (http://en.wikipedia.org/wiki/Integrated_Services_Digital_Network) but there would be a LOT of reading there.
And what your local service providers can offer may vary from that - so you should probably speak to them to find out what limitations they (and any regulatory bodies) impose on assignment of numbers etc.