Hi, I have more than 9 years of experience of linux admin with lots of flavors of posix operating system like Redhat linux, centos, debian ubuntu, suse etc and shell script too.I have about 4 years of experience of VOIP. I can do this in few hours, the actual task is not more than 2 hours buts some times , net interruption and testing takes times. I can do this asap. I will be available from 8 PM IST till 12 AM IST everyday. If interested please let me know.