I used the WHFC as client software for 
Hylafax server. My server is Red Hat 6.1 and my network is pure TCP/IP. The 
problem is that when some clients first time connecting to the  Hylafax 
server, it need a long time (about 4-5 mins). After the first time connection 
success, the following connection also within 10 seconds. It doesn't seems to be 
the network loading problem. I don't know what going wrong! Is there any cache 
files in WHFC or Hylafax? Or I set something wrong in server?
 
Thank You for your 
attention!!