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.
InfiniRoute Networks Inc. provides fully managed Voice over IP (VoIP) peering services for wireline and wireless carriers who need PSTN-quality VoIP connections to high-growth traffic regions worldwide.