Siemens Enterprise OpenStage 40 SIP IP-phone is a great solution for people working in the permanent place. This model features a large display and easy setup of various protocols such as TDM, HFA and SIP.
TalkFree provides VoIP products to make high quality, low cost communications around the world. Our products support PC, Landline, ATA, and a wide variety of Mobile phones including Nokia, iPhone, and Android