在一些更详细的情况中...

IP telephony with existing or new phone number. to use whether at home, in work, the road or on the computer. Information, registration and/or order on www.rolcomp.ch / http://facebook.com/rolcomp - Register:
http://sip.ch.rolcomp.com (Switzerland)
http://sip.de.rolcomp.com (Germany)
http://sip.at.rolcomp.com (Austria)