Skype differs from other VoIP-systems by several factors:
Skype is very popular. During the first week in August of 2003, more than 60 thousand people downloaded the Skype-client. Today, Skype is available for the following operating systems: MS Windows, MacOS, IoS, PocketPC, Android and Linux.
Persia Telecom Co. is a subsidiary of IOEC (Iranian Offshore Engineering & Construction Company) in Islamic Republic of Iran that was established in 2004.
IOEC is the 1st Iranian general contractor in the Oil & Gas industry.