Hi, I am planning a pbx with a possibly unusual set-up these days. There’ll be at least 4 BRI lines in T mode (outgoing to the PSTN in point-to-point mode (Anlagenanschluß for Germans)), 12 BRI lines in NT mode (connected to phones in point-to-multypoint setup (Mehrgeräteanschluß for Germans)), three FXS ports to connect analogue phones and last but not least a VOIP connection for occasional use.
Sicne the number of PCI slots are limeted in a PC I’ll need two 8-port BRI cards and a FXS adapter supporting at least 3 lines.
I can find numerous low cost single S0 (BRI) adaptors with the HFC chipset that can run in NT mode. They cost about 24 EUROs. However so far I have only seen 8-port cards in the 700 EURO plus range.
I noted that these modules often contain echo cancelation hardware - is this really needed for the above setup?
I will use a modern PC i.e. 1024 MB RAM and an Athlon 3000 CPU.
Thanks for any help and hints