[CentOS] fax over ip?

I did as : #yum search fax #yum search sip

---------- Forwarded message ---------- From: hadi motamedi motamedi24@gmail.com Date: Mon, 12 Sep 2011 12:51:06 +0430 Subject: fax over ip? To: CentOS mailing list centos@centos.org

Sorry to forget to mention : I installed 'efax' but it seems that it is for fax over a modem.

---------- Forwarded message ---------- From: hadi motamedi motamedi24@gmail.com Date: Mon, 12 Sep 2011 12:48:11 +0430 Subject: fax over ip? To: CentOS mailing list centos@centos.org

Dear All I have upgraded to centos 6.0 and I installed ekiga as my sip phone client for centos. What application can I install as fax over ip client for centos 6.0? Thank you