I’m almost 100% new to asterisk, and have been reading everything I can for almost a month, and I’m finally ready to start experimenting with Asterisk. There are however some things confusing me concerning hardware selction.
At home I have a connection to the PSTN with a ISDN BRI, 2 wire U interface, being converted through a NT1 to a 4 wire S/T interface. I assume this is where I should cut the line and plug in an Asterisk server. From there, a line is passed to 4 phones on the same wire. Now here’s where I’m confused. Are the same interfaces and plug-in hardware used for T1/E1 (PRI) used to connect a BRI? In that case I’d need 1 FXO and 1 FXS, so a TDM11B is where my money should be put? Or is there anyway a cheap studen can use 2 X100P cards?
If an office with 150 ISDN phones wanted to migrate to Asterisk without the costs of buying 150 new IP phones, what is the cheapest way to do this? I mean, obviously you can’t buy a PCI interface with 150 ports, but with 1-2 FXS lines, I suppose we have 31-62 phone lines that could be used simultaneously. Is there anybody selling some sorts of E1 -> Many E0 demux/switch?