This is cinda from Zhengzhou Great Electronic Tech CO.,LTD ,we are professional VoIP phones
GT-P301, it has 5 SIP lines
GT-P302, it has 5 SIP lines and 1 PSTN line, you can exchange calls between VoIP and PSTN line.
Any interested ,pls contact with me
msn : email@example.com
Skype : cindacinda5201