I am currently running a Euracom ISDN PBX on the German PSTN network. Also I have DSL.
This configuration I would like to replace by an Asterisk system, in the process getting rid completely of the expensive ISDN phoneline and using VoIP for all calls. I would however like to keep my internal ISDN bus with the existing phones as well as one analogue fax.
Can anybody give me pointers as to what kind of hardware I need for this application? I obviously would like to avoid expensive “professional hardware”.
I was currently thinking of following:
- AMD 64 2800+ running at 1GHz
- 256 MB DDR
1 AVM B1 active ISDN card (apparently supported by linux)
Following are my questions: (I am very happy to get an answer to just one of them…)
- Could I use the modem as an analogue Asterisk telephone port for the fax? Or how else can I connect the fax?
- If I wanted to connect the Asterisk box also to the existing ISDN PSTN to make sure everything is indeed running smoothly before I get rid of ISDN all together; can I just buy a second AVM B1 and use that as an external port? (I.e. any problems with two AVM B1’s?)
- How many telephone conversations can I have simultaneously in acceptable quality over a 128 KBit upstream connection?
- Are memory and processor suitable for this or are they hopelessly over-/under-scaled?
- Any other helpful pointers for somebody who is just getting started with Asterisk?
Thank you very much for your time!