On Tuesday, September 13, 2011 11:51 AM, hadi motamedi wrote: > Thank you very much for your help. I have experience with Asterisk but > on my Debian not on my centos. It is serving as DECT server for > telephony calls. It can provide sip calls as well. Do you mean it can > event provide fax over ip? You're using asterisk with telephony hardware but you cannot think that one out!? Any blinking pots line will do fax (the possible speeds will vary according to the quality of the line yes) and all you need is to find a way to interface your 'fax' with it.