Colin, I don't think that I'm the best person to answer this. I have an HFC ISDN card back in its box at work which I failed to get a decent connection when using it in combination with a Dell Optiplex GX240, Centos 3.4 and brstuffed Asterisk 1.0.9. The channels came up and calls would connect in and out, ableit unreliably, but the audio quality was very choppy. I suspect this was due to IRQ conflicts and it was impossible to assign a unique IRQ to the HFC card. As this was for a pilot PBX at a remote site, we went for a Multitech ISDN/VOIP Gateway. That Asterisk server just handles SIP & IAX traffic now. We have a couple of Supermicro 5014C-MFs which I will go back to with the HFC card http://www.supermicro.com/products/system/1U/5014/SYS-5014C-MF.cfm though ultimately we will need to terminate an ISDN30e connection for our main site. I'll copy this to the list where somebody else may be able to help out. I understand the Florz patch may help you (http://zaphfc.florz.dyndns.org/) and this post to the list may give you a start on how to best handle multiple HFC cards in the same box: http://www.voip-info.org/wiki-Asterisk+zaphfc+install26 Regards David Cook ________________________________ From: Colin Whittingham [mailto:colin@callXtreme.co.za] Sent: 10 November 2005 05:00 To: David Cook Subject: 4 HFC cards Hi Dave, I have a site running with 4 hfc cards installed. This is running on an AMD Processor 2800 with 512 MB ram on a standard motherboard. If there were 5 PCI slots on the motherboard I am sure that it would work too. I do however have a question. I have recently tried to install HFC cards on AAH 1.5 using bristuff-0.2.0-RC8o. The cards initialise but I cannot make calls, the "B" channels do not seem to come up. Any ideas? Regards Colin